WO2021200704A1 - 導電性組成物、生体電極及び生体センサ - Google Patents
導電性組成物、生体電極及び生体センサ Download PDFInfo
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- WO2021200704A1 WO2021200704A1 PCT/JP2021/013016 JP2021013016W WO2021200704A1 WO 2021200704 A1 WO2021200704 A1 WO 2021200704A1 JP 2021013016 W JP2021013016 W JP 2021013016W WO 2021200704 A1 WO2021200704 A1 WO 2021200704A1
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L101/00—Compositions of unspecified macromolecular compounds
- C08L101/12—Compositions of unspecified macromolecular compounds characterised by physical features, e.g. anisotropy, viscosity or electrical conductivity
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/24—Detecting, measuring or recording bioelectric or biomagnetic signals of the body or parts thereof
- A61B5/25—Bioelectric electrodes therefor
- A61B5/263—Bioelectric electrodes therefor characterised by the electrode materials
- A61B5/268—Bioelectric electrodes therefor characterised by the electrode materials containing conductive polymers, e.g. PEDOT:PSS polymers
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L65/00—Compositions of macromolecular compounds obtained by reactions forming a carbon-to-carbon link in the main chain; Compositions of derivatives of such polymers
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D129/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an alcohol, ether, aldehydo, ketonic, acetal, or ketal radical; Coating compositions based on hydrolysed polymers of esters of unsaturated alcohols with saturated carboxylic acids; Coating compositions based on derivatives of such polymers
- C09D129/02—Homopolymers or copolymers of unsaturated alcohols
- C09D129/04—Polyvinyl alcohol; Partially hydrolysed homopolymers or copolymers of esters of unsaturated alcohols with saturated carboxylic acids
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D165/00—Coating compositions based on macromolecular compounds obtained by reactions forming a carbon-to-carbon link in the main chain; Coating compositions based on derivatives of such polymers
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/62—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
- G01N21/63—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light optically excited
- G01N21/65—Raman scattering
- G01N21/658—Raman scattering enhancement Raman, e.g. surface plasmons
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
- H01B1/06—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors mainly consisting of other non-metallic substances
- H01B1/12—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors mainly consisting of other non-metallic substances organic substances
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G2261/00—Macromolecular compounds obtained by reactions forming a carbon-to-carbon link in the main chain of the macromolecule
- C08G2261/10—Definition of the polymer structure
- C08G2261/14—Side-groups
- C08G2261/142—Side-chains containing oxygen
- C08G2261/1424—Side-chains containing oxygen containing ether groups, including alkoxy
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G2261/00—Macromolecular compounds obtained by reactions forming a carbon-to-carbon link in the main chain of the macromolecule
- C08G2261/30—Monomer units or repeat units incorporating structural elements in the main chain
- C08G2261/32—Monomer units or repeat units incorporating structural elements in the main chain incorporating heteroaromatic structural elements in the main chain
- C08G2261/322—Monomer units or repeat units incorporating structural elements in the main chain incorporating heteroaromatic structural elements in the main chain non-condensed
- C08G2261/3223—Monomer units or repeat units incorporating structural elements in the main chain incorporating heteroaromatic structural elements in the main chain non-condensed containing one or more sulfur atoms as the only heteroatom, e.g. thiophene
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G2261/00—Macromolecular compounds obtained by reactions forming a carbon-to-carbon link in the main chain of the macromolecule
- C08G2261/70—Post-treatment
- C08G2261/79—Post-treatment doping
- C08G2261/794—Post-treatment doping with polymeric dopants
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G2261/00—Macromolecular compounds obtained by reactions forming a carbon-to-carbon link in the main chain of the macromolecule
- C08G2261/90—Applications
- C08G2261/94—Applications in sensors, e.g. biosensors
Definitions
- the present invention relates to conductive compositions, bioelectrodes and biosensors.
- biosensors that measure biometric information such as electrocardiogram, pulse wave, electroencephalogram, and myoelectricity are used.
- the biosensor includes a bioelectrode that comes into contact with the living body and acquires biometric information of the subject.
- a biosensor is attached to the subject's skin and the bioelectrode is brought into contact with the subject's skin. Biometric information is measured by acquiring electrical signals related to biometric information with bioelectrodes.
- an electrode body formed by using a conductive polymer and a polymer gel covering at least a part of the electrode body are provided, and the electrode body and the height are provided from the surface side of the skin.
- a body surface-mounted electrode in which molecular gels are laminated in this order is disclosed (see, for example, Patent Document 1).
- the biological signal is detected by bringing the electrode body into direct contact with the surface of the skin.
- One aspect of the present invention is to provide a conductive composition capable of improving conductivity and suppressing rough skin when used as an electrode.
- One aspect of the conductive composition according to the present invention comprises a binder resin and a conductive polymer, and the conductive polymer has a quinoid structure and a benzoid structure, and in the Raman spectrum obtained by Raman spectroscopy, the above-mentioned
- the ratio of the half-value width of the peak intensity corresponding to the benzoid structure to the half-value width of the peak intensity corresponding to the quinoid structure is 0.5 to 12.
- One aspect of the conductive composition according to the present invention can improve conductivity and suppress rough skin when used as an electrode.
- the tilde "-" indicating a numerical range means that the numerical values described before and after the tilde are included as the lower limit value and the upper limit value unless otherwise specified.
- the conductive composition according to the embodiment of the present invention contains a conductive polymer and a binder resin, and the conductive polymer is contained in a state of being dispersed in the binder resin.
- Examples of the conductive polymer include polythiophene-based conductive polymer, polyaniline-based conductive polymer, polyacetylene-based conductive polymer, polypyrrole-based conductive polymer, polyphenylene-based conductive polymer and derivatives thereof, and these. Complex and the like can be used. These may be used alone or in combination of two or more.
- polythiophene-based conductive polymer examples include polythiophene, poly (3-methylthiophene), poly (3-ethylthiophene), poly (3-propylthiophene), poly (3-butylthiophene), and poly (3-hexylthiophene).
- Polyaniline-based conductive polymers include polyaniline; polystyrene sulfonic acid (also called PSS), polyvinyl sulfonic acid, polyallyl sulfonic acid, polyacrylic sulfonic acid, polymethacrylsulfonic acid, and poly (2-acrylamide-2-methylpropanesulfon).
- PSS polystyrene sulfonic acid
- polyvinyl sulfonic acid also called PSS
- polyallyl sulfonic acid polyacrylic sulfonic acid
- polymethacrylsulfonic acid polymethacrylsulfonic acid
- poly (2-acrylamide-2-methylpropanesulfon poly (2-acrylamide-2-methylpropanesulfon
- Polymers with sulfonic acid groups such as acid), polyisoprene sulfonic acid, polysulfoethyl methacrylate, poly (4-sulfobutyl methacrylate), polymethacryloxybenzene sulfonic acid, polyvinylcarboxylic acid, polystyrene carboxylic acid, polyallylcarboxylic Examples thereof include polymers having a carboxylic acid group such as acid, polyacrylic carboxylic acid, polymethacrylcarboxylic acid, poly (2-acrylamide-2-methylpropanecarboxylic acid), polyisoprenecarboxylic acid, and polyacrylic acid.
- carboxylic acid group such as acid, polyacrylic carboxylic acid, polymethacrylcarboxylic acid, poly (2-acrylamide-2-methylpropanecarboxylic acid), polyisoprenecarboxylic acid, and polyacrylic acid.
- These may be used as a homopolymer obtained by polymerizing one kind alone, or may be used as a copolymer of two or more kinds.
- a polymer having a sulfonic acid group is preferable, and polystyrene sulfonic acid is more preferable, because the conductivity can be made higher.
- polyacetylene-based conductive polymer examples include polyacetylene monoester having an ester at the para-position of phenylacetylene and polyacetylene having a polar group such as polyphenylacetylene monoamide having an amide at the para-position of phenylacetylene.
- Polypyrrole-based conductive polymers include polypyrrole, poly (N-methylpyrrole), poly (3-methylpyrrole), poly (3-ethylpyrrole), poly (3-n-propylpyrrole), and poly (3-butyl).
- Pyrrole poly (3-octylpyrrole), poly (3-decylpyrrole), poly (3-dodecylpyrrole), poly (3,4-dimethylpyrrole), poly (3,4-dibutylpyrrole), poly (3) -Carboxypyrrole), poly (3-methyl-4-carboxypyrrole), poly (3-methyl-4-carboxyethylpyrrole), poly (3-methyl-4-carboxybutylpyrrole), poly (3-hydroxypyrrole) , Poly (3-methoxypyrrole), poly (3-ethoxypyrrole), poly (3-butoxypyrrole), poly (3-hexyloxypyrrole), poly (3-methyl-4-hexyloxypyrrole) and the like. ..
- polyphenylene conductive polymer examples include polyphenylene vinylene and the like.
- complexes examples include a complex obtained by doping polythiophene with polyaniline as a dopant.
- polythiophene and polyaniline examples include PEDOT / PSS or the like in which PEDOT is doped with PSS can be used.
- the conductive polymer a composite obtained by doping polythiophene with polyaniline as a dopant is preferable.
- PEDOT / PSS obtained by doping PEDOT with PSS is more preferable because the contact impedance with the living body is lower and the conductivity is high.
- the content of the conductive polymer is preferably 0.20 parts by mass to 20 parts by mass, and more preferably 2.5 parts by mass to 15 parts by mass with respect to 100 parts by mass of the conductive composition. , 3.0 parts by mass to 12 parts by mass is more preferable.
- the conductive composition can have excellent conductivity, toughness and flexibility as long as the content is within the above-mentioned preferable range with respect to the conductive composition.
- the conductive polymer may be used as an aqueous solution dissolved in a solvent.
- a solvent an organic solvent and an aqueous solvent can be used.
- the organic solvent include ketones such as acetone and methyl ethyl ketone (MEK); esters such as ethyl acetate; ethers such as propylene glycol monomethyl ether; and amides such as N, N-dimethylformamide.
- the aqueous solvent include water; alcohols such as methanol, ethanol, propanol and isopropanol. Among these, it is preferable to use an aqueous solvent.
- the conductive polymer has a molecular structure including a quinoid structure and a benzoide structure.
- the conductive polymer constitutes a state in which polymer sites exhibiting electrical conductivity are efficiently arranged with each other, the conductive polymer is quinoidized and has a quinoid structure.
- the conductive polymer is PEDOT
- the PEDOT has a quinoid structure as described below in a state where the polymer sites in which PEDOT exhibits electrical conductivity are efficiently arranged.
- a cross-linking agent is added to PEDOT and replaced with cations contained in the cross-linking agent, PEDOT is converted from a quinoid structure to a benzoid structure.
- PEDOT has a quinoid structure or a benzoid structure
- Raman shift of the Raman spectrum obtained by Raman spectroscopy Specifically, by measuring the Raman scattered light using a Raman spectroscope, as shown in FIG. 1, the expansion and contraction vibration of the 5-membered ring is shifted, and the pulse width (half width of the peak) of the Raman excitation light is increased. By widening the bandwidth, it can be confirmed that the quinoid structure is changed to the benzoid structure.
- the ratio of the half width of the peak intensity corresponding to the quinoid structure to the half width of the peak intensity corresponding to the benzoid structure (hereinafter, simply "the peak half width of the benzoid structure / the peak of the quinoid structure”.
- the “half width”) is 0.5 to 12, preferably 0.6 to 10, and more preferably 0.7 to 10.
- the inventor of the present application adjusts the content of the cross-linking agent and the like to adjust the ratio of the quinoid structure and the benzoide structure constituting the conductive polymer. Focused on the fact that can be changed. Then, the inventor of the present application, as a ratio of the quinoid structure to the benzoid structure, is the ratio of the half width of the peak intensity corresponding to the benzoid structure to the half width of the peak intensity corresponding to the quinoid structure in the Raman spectrum obtained by Raman spectroscopy. It has been found that when the value is 0.5 to 12, the resistance of the cured product made of the conductive composition is reduced and the decrease in pH is suppressed.
- the ratio of the quinoid structure to the benzoid structure constituting the conductive polymer can be adjusted, for example, by adding a cross-linking agent, but the conductive polymer is cross-linked in order to increase the ratio of the quinoid structure.
- the amount of the agent added is increased, the pH of the cured product containing the conductive polymer tends to be too low.
- the addition amount of the cross-linking agent is reduced or not added in order to increase the proportion of the benzoid structure in the conductive polymer, it is possible to suppress the decrease in the pH of the cured product containing the conductive polymer, but it is conductive.
- the proportion of the benzoid structure in the polymer increases, the resistance of the cured product containing the conductive polymer tends to increase, and the conductivity tends to be difficult to increase.
- the ratio of the quinoid structure to the benzoid structure constituting the conductive polymer can be adjusted, for example, by adding a cross-linking agent.
- the conductive polymer is PEDOT / PSS or PEDOT
- sodium glyoxylate or the like when sodium glyoxylate or the like is added as a cross-linking agent, the Na ion of sodium glyoxylate is replaced with the hydrogen ion of PEDOT / PSS, or PEDOT is used.
- the quinoid structure constituting the conductive polymer becomes a benzoide structure in a large proportion. Therefore, the conductive polymer tends to contain a relatively large amount of benzoide structure as compared with quinoid structure.
- the proportions of the quinoid structure and the benzoid structure constituting the conductive polymer are the half width of the peak intensity corresponding to the quinoid structure and the half width of the peak intensity corresponding to the benzoid structure in the Raman spectrum obtained by Raman spectroscopy, respectively. It is related to the size and can be specified from the size of the half width of these peak intensities.
- the conductive polymer contains a relatively large amount of the quinoid structure as compared with the benzoide structure. Therefore, the conductivity of the cured product containing the conductive polymer can be increased, but the pH of the cured product containing the conductive polymer becomes too low and tends to become a strong acid.
- the conductive polymer contains a relatively large amount of the benzoide structure as compared with the quinoid structure. Therefore, the pH can be set to be good for the living body, but the conductivity of the cured product containing the conductive polymer tends to be too low.
- the conductive composition according to the present embodiment is conductive by setting the ratio of the half width of the peak intensity corresponding to the benzoid structure to the half width of the peak intensity corresponding to the quinoid structure after curing to be 0.5 to 12.
- the cured product of the conductive composition according to the present embodiment can improve the conductivity, suppress the burden on the skin, and suppress the rough skin.
- the position of the peak corresponding to quinoid structure constituting the conductive polymer Raman shift is in the range of 1200 cm -1 ⁇ 1480 cm -1, corresponding to benzoid structures position of the peaks is preferably Raman shift is in a range of 1485cm -1 ⁇ 1650cm -1. Peaks corresponding to the quinoid structure is more preferably a Raman shift in the range of 1250 cm -1 ⁇ 1450 cm -1, more preferably in the range of 1350cm -1 ⁇ 1435cm -1.
- Peaks corresponding to benzoid structures more preferably Raman shift in the range of 1500 cm -1 ⁇ 1550 cm -1, more preferably in the range of 1510cm -1 ⁇ 1535cm -1.
- the peak positions of these Raman spectra are likely to fluctuate depending on the proportion of the quinoid structure and the proportion of the benzoid structure contained in the conductive composition.
- the position of each peak corresponding to the quinoid structure and the benzoid structure is within the above-mentioned preferable range, it corresponds to the benzoid structure with respect to the half width of the peak intensity corresponding to the quinoid structure contained in the conductive composition.
- the ratio of the half width of the peak intensity to be adjusted can be easily adjusted within the range of 0.5 to 12.
- a water-soluble polymer As the binder resin, a water-soluble polymer, a water-insoluble polymer, or the like can be used.
- the binder resin it is preferable to use a water-soluble polymer from the viewpoint of compatibility with other components contained in the conductive composition.
- the water-soluble polymer may contain a polymer having hydrophilicity (hydrophilic polymer), which is not completely soluble in water.
- a hydroxyl group-containing polymer or the like can be used as the water-soluble polymer.
- a hydroxyl group-containing polymer saccharides such as agarose, polyvinyl alcohol (PVA), modified polyvinyl alcohol, a copolymer of acrylic acid and sodium acrylate, and the like can be used. These may be used alone or in combination of two or more. Among these, polyvinyl alcohol or modified polyvinyl alcohol is preferable, and modified polyvinyl alcohol is more preferable.
- modified polyvinyl alcohol examples include acetacetyl group-containing polyvinyl alcohol and diacetone acrylamide modified polyvinyl alcohol.
- diacetone acrylamide-modified polyvinyl alcohol for example, a diacetone acrylamide-modified polyvinyl alcohol-based resin (DA-modified PVA-based resin) described in JP-A-2016-166436 can be used.
- the content of the binder resin is preferably 5 parts by mass to 140 parts by mass, more preferably 10 parts by mass to 100 parts by mass, and 20 parts by mass to 70 parts by mass with respect to 100 parts by mass of the conductive composition. It is more preferably parts by mass. If the content is within the above-mentioned preferable range with respect to the conductive composition, the cured product obtained by using the conductive composition can have excellent conductivity, toughness and flexibility. ..
- the binder resin may be used as an aqueous solution dissolved in a solvent.
- a solvent the same solvent as in the case of the above-mentioned conductive polymer can be used.
- the conductive composition preferably further contains at least one of a cross-linking agent and a plasticizer.
- the cross-linking agent and the plasticizer have a function of imparting toughness and flexibility to the cured product obtained by using the conductive composition.
- toughness is a property that achieves both excellent strength and elongation.
- the toughness does not include the property that one of the strength and the elongation is remarkably excellent, but the other is remarkably low, and includes the property that the balance of both strength and the elongation is excellent.
- Flexibility is a property that can suppress the occurrence of damage such as breakage at the bent portion after bending the cured product containing the conductive composition.
- the cross-linking agent has a function of cross-linking the binder resin.
- the cross-linking agent preferably has reactivity with a hydroxyl group. If the cross-linking agent has reactivity with a hydroxyl group, the cross-linking agent can react with the hydroxyl group of the hydroxyl group-containing polymer when the binder resin is a hydroxyl group-containing polymer.
- cross-linking agent examples include zirconium compounds such as zirconium salts; titanium compounds such as titanium salts; boron compounds such as boric acid; isocyanate compounds such as blocked isocyanate; aldehyde compounds such as sodium glyoxylate, formaldehyde, acetaldehyde, glyoxal and glutaraldehyde; Examples thereof include an alkoxyl group-containing compound and a methylol group-containing compound. These may be used alone or in combination of two or more.
- the binder resin is porvinyl alcohol
- glyoxylic acid is easy to maintain the performance of the cured product obtained by using the conductive composition.
- Sodium acid is preferred.
- the cross-linking agent is an optional component, it does not necessarily have to be contained in the conductive composition, and the content of the cross-linking agent may be 0 parts by mass.
- the content of the cross-linking agent is preferably 1.5 parts by mass or less, more preferably 0.01 parts by mass to 1.5 parts by mass, and 0. 2 parts by mass to 1.2 parts by mass is more preferable, and 0.4 parts by mass to 1.0 part by mass is most preferable.
- the content of the cross-linking agent is 1.5 parts by mass or less, the conductive polymer contained in the cured product obtained by using the conductive composition has a benzoid structure with respect to the half width of the peak intensity corresponding to the quinoid structure.
- the ratio of the half width of the peak intensity corresponding to the above can be optimally prepared in the range of 0.5 to 12. Further, if the content of the cross-linking agent is within the above-mentioned more preferable range, the conductive polymer contained in the cured product of the conductive composition corresponds to the benzoid structure with respect to the half width of the peak intensity corresponding to the quinoid structure. The ratio of the half width of the peak intensity to be formed can be more reliably prepared within the range of 0.5 to 12, and the cured product of the conductive composition can have excellent toughness and flexibility.
- the cross-linking agent may be used as an aqueous solution dissolved in a solvent.
- a solvent the same solvent as in the case of the above-mentioned conductive polymer can be used.
- the plasticizer has a function of improving the conductivity of the cured product obtained by using the conductive composition and improving the tensile elongation and flexibility.
- the plasticizer include glycerin, ethylene glycol, propylene glycol, sorbitol, and polyol compounds such as N-methylpyrrolidone (NMP), dimethylformaldehyde (DMF), NN'-dimethylacetamide (DMAc), and dimethyl sulfoxide.
- NMP N-methylpyrrolidone
- DMF dimethylformaldehyde
- DMAc NN'-dimethylacetamide
- dimethyl sulfoxide examples thereof include aprotonic compounds such as (DMSO). These may be used alone or in combination of two or more. Among these, glycerin is preferable from the viewpoint of compatibility with other components.
- the content of the plasticizer is preferably 0.2 part by mass to 150 parts by mass, more preferably 1.0 part by mass to 90 parts by mass, with respect to 100 parts by mass of the conductive composition. It is more preferably parts by mass to 70 parts by mass. If the content is within the above-mentioned preferable range, the cured product obtained by using the conductive composition can have excellent toughness and flexibility.
- the conductive composition contains at least one of a cross-linking agent and a thermoplastic agent, so that the conductive polymer contained in the conductive composition has a peak intensity corresponding to the benzoid structure with respect to the half width of the peak intensity corresponding to the quinoid structure.
- the half width ratio of can be adjusted in the range of 0.5 to 12, and the cured product obtained by using the conductive composition can improve toughness and flexibility.
- the conductive polymer contained in the cured product obtained by using the conductive composition is a benzoide with respect to the half width of the peak intensity corresponding to the quinoid structure.
- the ratio of the half width of the peak intensity corresponding to the structure can be adjusted in the range of 0.5 to 12.
- the cured product obtained by using the conductive composition can further improve toughness, that is, both tensile strength and tensile elongation, and can also improve flexibility.
- the conductive composition contains a plasticizer but does not contain a cross-linking agent
- the tensile elongation of the cured product obtained by using the conductive composition can be improved. Therefore, the conductive composition is used as a whole.
- the obtained cured product can improve toughness. In addition, the flexibility of the cured product obtained by using the conductive composition can be improved.
- the conductive composition preferably contains both a cross-linking agent and a plasticizer.
- the cured product obtained by using the conductive composition can have even better toughness.
- the conductive composition may contain a surfactant, a softener, a stabilizer, a leveling agent, an antioxidant, an antioxidant, a leavening agent, a thickener, a colorant, or a colorant, if necessary.
- a surfactant include silicone-based surfactants.
- the conductive composition is prepared by mixing each of the above components in the above ratio.
- the conductive composition can appropriately contain a solvent in an arbitrary ratio, if necessary. As a result, an aqueous solution of the conductive composition (an aqueous solution of the conductive composition) is prepared.
- an organic solvent or an aqueous solvent can be used.
- the organic solvent include ketones such as acetone and methyl ethyl ketone (MEK); esters such as ethyl acetate; ethers such as propylene glycol monomethyl ether; and amides such as N, N-dimethylformamide.
- the aqueous solvent include water; alcohols such as methanol, ethanol, propanol and isopropanol. Among these, it is preferable to use an aqueous solvent.
- the cured product obtained by using the conductive composition according to the present embodiment preferably has a pH of 1 to 10, more preferably 1 to 8, and even more preferably 1 to 6.
- a known method can be used for measuring the pH of the cured product, for example, a method in which a lithomas test paper is brought into contact with the cured product, or a method in which a solution of a conductive composition dissolved in a solvent is brought into contact with the lithomas test paper. Etc. can be used.
- a conductive composition containing the conductive polymer and the binder resin is prepared.
- the conductive composition may further contain at least one of a cross-linking agent and a plasticizer in the above proportions.
- the conductive polymer, the binder resin and the cross-linking agent may be used as an aqueous solution dissolved in a solvent.
- the conductive composition contains, if necessary, a solvent containing a conductive polymer, a binder resin and a cross-linking agent in an appropriate ratio, and an aqueous solution of the conductive composition (aqueous solution of the conductive composition). ) May be used.
- a solvent the same solvent as the above-mentioned solvent can be used.
- the conductive composition After applying the conductive composition to the surface of the release base material, the conductive composition is heated to promote the cross-linking reaction of the binder resin contained in the conductive composition, and the binder resin is cured to make the conductive composition conductive. A cured product of the sex composition is obtained. The obtained cured product is hardened while forming one or more through holes on the surface of the cured product by punching (pressing) the surface of the cured product using a press or the like, if necessary. The outer shape of the object is molded into a predetermined shape. As a result, a bioelectrode, that is, an electrode 30, which is a molded body having one or more through holes on the surface and having an outer shape having a predetermined shape, can be obtained.
- the molding may be performed by a laser processing machine instead of the press machine.
- the obtained cured product may have only one or more through holes formed on its surface, or may have only its outer shape formed into a predetermined shape.
- the cured product when the cured product can be used as a bioelectrode as it is, the cured product may be used as a bioelectrode without molding or the like.
- Each component of the conductive polymer, the binder resin, the cross-linking agent, and the plasticizer contained in the bioelectrode has a content equivalent to the amount added at the time of producing the conductive composition. Further, the ratio of the quinoid structure and the benzoid structure of the conductive polymer contained in the bioelectrode is the same as that of the conductive composition, and the peak intensity corresponding to the benzoid structure is half of the half width of the peak intensity corresponding to the quinoid structure. The price range ratio is in the range of 0.5-12.
- a separator As the peeling base material, a separator, a core material, or the like can be used.
- a resin film such as polyethylene terephthalate (PET) film, polyethylene (PE) film, polypropylene (PP) film, polyamide (PA) film, polyimide (PI) film, or fluororesin film can be used.
- the core material use a resin film such as PET film or PI film; a ceramic sheet; a metal film such as aluminum foil; a resin substrate reinforced with glass fiber or plastic non-woven fiber; a silicone substrate or a glass substrate or the like. Can be done.
- a method of applying the conductive composition on the peeling substrate a method by roll coating, screen coating, gravure coating, spin coating, reverse coating, bar coating, blade coating, air knife coating, dipping, dispensing, etc., a small amount
- a method of hanging the conductive composition of the above on a base material and stretching it with a doctor blade or the like can be used.
- the conductive composition is uniformly coated on the release base material.
- dryers such as a drying oven, a vacuum oven, an air circulation type oven, a hot air dryer, a far infrared dryer, a microwave vacuum dryer, and a high frequency dryer can be used. ..
- the heating conditions may be any conditions as long as the cross-linking agent contained in the conductive composition can react.
- the heating temperature of the conductive composition is a temperature at which curing of the binder resin contained in the conductive composition can proceed.
- the heating temperature is preferably 100 ° C. to 200 ° C.
- the conductive composition contains a cross-linking agent, if the heating temperature is in the range of 100 ° C. to 200 ° C., the reaction of the cross-linking agent is likely to proceed, and the curing of the binder resin can be promoted.
- the heating time of the conductive composition is preferably 0.5 minutes to 300 minutes, more preferably 5 minutes to 120 minutes. If the heating time is within the range of 0.5 minutes to 300 minutes, the binder resin can be sufficiently cured.
- the conductive polymer contains a quinoid structure and a benzoide structure, and has a half width of the peak intensity corresponding to the benzoid structure with respect to the half width of the peak intensity corresponding to the quinoid structure.
- the ratio is 0.5 to 12.
- the contact impedance is lower, stable and accurate measurement can be performed, and when the contact impedance is, for example, 500 ⁇ or less, the electrocardiogram can be stably measured as biometric information.
- the position of the peak corresponding to the quinoid structure Raman shift is in a range of 1200 cm -1 ⁇ 1480 cm -1, the position of the peak corresponding to the benzoid structures
- the Raman shift can be in the range of 1485 cm -1 to 1650 cm -1. If the positions of the peaks corresponding to the quinoid structure and the benzoid structure are within a predetermined range, the peak intensity corresponding to the benzoid structure is half of the half width of the peak intensity corresponding to the quinoid structure contained in the conductive composition. It becomes easy to adjust the ratio of the price range within the range of 0.5 to 12.
- each peak corresponding to the quinoid structure and the benzoid structure is within a predetermined range, it corresponds to the benzoid structure with respect to the half width of the peak intensity corresponding to the quinoid structure contained in the conductive composition. It is possible to easily identify that the ratio of the half width of the peak intensity is in the range of 0.5 to 12.
- the conductive composition according to the present embodiment has, as the conductive polymer, a polythiophene-based conductive polymer, a polyaniline-based conductive polymer, a polyacetylene-based conductive polymer, derivatives thereof, and a composite thereof.
- a polythiophene-based conductive polymer a polythiophene-based conductive polymer
- a polyaniline-based conductive polymer a polyaniline-based conductive polymer
- a polyacetylene-based conductive polymer derivatives thereof
- a composite thereof a composite thereof.
- One or more components selected from the group consisting of can be used. Since these conductive polymers can contain a quinoid structure and a benzoide structure, the resistance and pH of the cured product obtained by using the conductive composition can be adjusted. Therefore, it is possible to easily reduce the resistance of the cured product and to suppress the decrease in pH of the cured product.
- the conductive composition according to the present embodiment can contain 0.01 parts by mass to 1.5 parts by mass of a cross-linking agent.
- the conductive composition has a ratio of the half width of the peak intensity corresponding to the benzoid structure to the half width of the peak intensity corresponding to the quinoid structure in the molecular structure of the quinoid structure and the benzoid structure contained in the conductive polymer. It can be easily prepared so as to be in the range of 0.5 to 12. Therefore, when a cured product containing the conductive composition is molded and used as a bioelectrode, the conductivity can be improved more stably and the effect of suppressing rough skin can be enhanced.
- the conductive composition according to the present embodiment can contain 0.2 parts by mass to 150 parts by mass of a plasticizer. As a result, when the cured product of the conductive composition is used as the bioelectrode, the conductivity can be further improved and the rough skin can be suppressed.
- the conductive composition according to the present embodiment has the above-mentioned characteristics, it is effectively used as a bioelectrode by containing a cured product of the conductive composition as a material for a biosensor electrode (bioelectrode). be able to.
- the bioelectrode can have any shape such as a sheet shape.
- the bioelectrode formed by using the conductive composition according to the present embodiment has high conductivity and can reduce irritation to the skin, it is attached to a biosensor, particularly the skin of a living body, and has high conductivity. It can be suitably used as a bioelectrode of a stick-type biosensor that requires sex and skin safety.
- the concentration of the modified polyvinyl alcohol in the aqueous solution containing the modified polyvinyl alcohol is 10%
- the content of the modified polyvinyl alcohol in the aqueous solution of the conductive composition is 1.00 parts by mass.
- the balance is the solvent in the aqueous solution of the conductive composition.
- a part of the PEDOT / PSS pellets may be dissolved in water (solvent) within a range that does not cause a large variation in the content of each component with respect to the conductive composition.
- the contents of the conductive polymer, the binder resin and the plasticizer with respect to 100.00 parts by mass of the conductive composition were 11.24 parts by mass, 29.59 parts by mass and 59.17 parts by mass, respectively.
- the prepared aqueous solution of the conductive composition was applied onto a polyethylene terephthalate (PET) film using an applicator. Then, the PET film coated with the aqueous solution of the conductive composition is conveyed to a drying oven (SPHH-201, manufactured by ESPEC), and the aqueous solution of the conductive composition is heated and dried at 120 ° C. for 10 minutes to obtain a conductive composition. A cured product of the product was prepared. The cured product was pressed into a sheet to form an electrode sheet (bioelectrode) as a molded body.
- SPHH-201 drying oven
- the obtained electrode sheet was sectioned to prepare a measurement sample.
- the cross section of the measurement sample was spectroscopically analyzed by a Raman spectrum under the following measurement conditions, and a peak derived from the quinoid structure and a peak derived from the benzoid structure were confirmed.
- the peak half width derived from the quinoid structure is about 53.4 cm -1
- the peak half width derived from the benzoid structure is about 233.4 cm -1, which is relative to the half width of the peak intensity corresponding to the quinoid structure.
- the ratio of the half width of the peak intensity corresponding to the benzoid structure was 4.40.
- the measurement result of the Raman spectrum is shown in FIG. ((Measurement condition)) Point analysis conditions Measuring device: "LabRAM HR-800", Jobin Yvon S.A. A. Excitation wavelength manufactured by S company: 633 nm Wavenumber range: 1200 cm -1 to 1600 cm -1 Detector: CCD
- the resistance value of the obtained electrode sheet was measured, and the conductivity was evaluated according to the following criteria. If the resistance value is 50 ⁇ or less, it is judged to be excellent (indicated as A in Table 1), and if the resistance value is more than 50 ⁇ and 100 ⁇ or less, it is judged to be good (indicated as B in Table 1). However, if the resistance value exceeds 100 ⁇ and is 500 ⁇ or less, it is judged to be good (denoted as C in Table 1), and if the resistance value exceeds 500 ⁇ , it is judged to be defective (denoted as D in Table 1). bottom. ((Measurement condition)) A: Resistance value is 50 ⁇ or less B: Resistance value is more than 50 ⁇ and 100 ⁇ or less C: Resistance value is more than 100 ⁇ and 500 ⁇ or less D: Resistance value is more than 500 ⁇
- Example 2 In Example 1, the same as in Example 1 except that 0.20 parts by mass of sodium glyoxylate (“Safelink SPM-01”, manufactured by Mitsubishi Chemical Corporation) was added to the conductive composition as a cross-linking agent. went.
- 0.20 parts by mass of sodium glyoxylate (“Safelink SPM-01”, manufactured by Mitsubishi Chemical Corporation) was added to the conductive composition as a cross-linking agent. went.
- each component (conductive polymer, binder resin, cross-linking agent and plasticizer) contained in the conductive composition produced in this example is 100.00 parts by mass of the conductive composition, respectively. It was 10.61 parts by mass, 27.93 parts by mass, 5.59 parts by mass and 55.87 parts by mass.
- the peak width at half maximum derived from the quinoid structure of the conductive polymer contained in the obtained electrode sheet is about 27.8 cm -1
- the peak width at half maximum derived from the benzoid structure is about 25.3 cm -1 .
- the ratio of the half-value width of the peak intensity corresponding to the benzoid structure to the half-value width of the peak intensity corresponding to the quinoid structure was 0.91.
- the measurement result of the Raman spectrum is shown in FIG.
- Example 3 In Example 1, the same as in Example 1 except that 1.00 parts by mass of sodium glyoxylate (“Safelink SPM-01”, manufactured by Mitsubishi Chemical Corporation) was added to the conductive composition as a cross-linking agent. went.
- 1.00 parts by mass of sodium glyoxylate (“Safelink SPM-01”, manufactured by Mitsubishi Chemical Corporation) was added to the conductive composition as a cross-linking agent. went.
- each component (conductive polymer, binder resin, cross-linking agent and plasticizer) contained in the conductive composition produced in this example is 100.00 parts by mass of the conductive composition, respectively. It was 8.68 parts by mass, 22.83 parts by mass, 22.83 parts by mass and 45.66 parts by mass.
- the ratio of the half-value width of the peak intensity corresponding to the benzoid structure to the half-value width of the peak intensity corresponding to the quinoid structure of the conductive polymer contained in the obtained electrode sheet was 0.70.
- Example 4 In Example 1, the ratio of the half-value width of the peak intensity corresponding to the benzoid structure to the half-value width of the peak intensity corresponding to the quinoid structure of the conductive polymer contained in the obtained electrode sheet was changed to 10.00. Then, the same procedure as in Example 1 was carried out except that the pH of the aqueous conductive composition solution was changed to 1.5 or less. The ratio of the half width of the peak intensity corresponding to the benzoid structure to the half width of the peak intensity corresponding to the quinoid structure was adjusted to 10.00.
- Example 5 the ratio of the half-value width of the peak intensity corresponding to the benzoid structure to the half-value width of the peak intensity corresponding to the quinoid structure of the conductive polymer contained in the obtained electrode sheet is 3.00.
- the procedure was carried out in the same manner as in Example 1 except that the pH of the aqueous conductive composition solution was changed to 7.0.
- the ratio of the half-value width of the peak intensity corresponding to the benzoid structure to the half-value width of the peak intensity corresponding to the quinoid structure was the same as in Example 1 above.
- Example 6 the ratio of the half width of the peak intensity corresponding to the benzoid structure to the half width of the peak intensity corresponding to the quinoid structure of the conductive polymer contained in the obtained electrode sheet is 2.00.
- the procedure was carried out in the same manner as in Example 1 except that the pH of the aqueous conductive composition solution was changed to 9.0.
- the ratio of the half-value width of the peak intensity corresponding to the benzoid structure to the half-value width of the peak intensity corresponding to the quinoid structure was the same as in Example 1 above.
- Example 7 In Example 1, 0.20 parts by mass of sodium glyoxylate (“Safelink SPM-01”, manufactured by Mitsubishi Chemical Corporation) was added to the conductive composition as a cross-linking agent. Then, the ratio of the half-value width of the peak intensity corresponding to the benzoid structure to the half-value width of the peak intensity corresponding to the quinoid structure of the conductive polymer contained in the obtained electrode sheet was changed to 1.00. The pH of the aqueous conductive composition solution was changed to 7.0. Other than that, it was carried out in the same manner as in Example 1. The ratio of the half-value width of the peak intensity corresponding to the benzoid structure to the half-value width of the peak intensity corresponding to the quinoid structure was the same as in Example 1 above.
- each component (conductive polymer, binder resin, cross-linking agent and plasticizer) contained in the conductive composition produced in this example is 100.00 parts by mass of the conductive composition, respectively. It was 10.61 parts by mass, 27.93 parts by mass, 5.59 parts by mass and 55.87 parts by mass.
- Example 8> In Example 1, the conductive polymer was changed to polyaniline (“polyaniline (emeraldine salt)” manufactured by Sigma-Aldrich). Then, the ratio of the half-value width of the peak intensity corresponding to the benzoid structure to the half-value width of the peak intensity corresponding to the quinoid structure of the conductive polymer contained in the obtained electrode sheet was changed to 3.20. The pH of the aqueous conductive composition solution was changed to 4.0. Other than that, it was carried out in the same manner as in Example 1. The ratio of the half-value width of the peak intensity corresponding to the benzoid structure to the half-value width of the peak intensity corresponding to the quinoid structure was the same as in Example 1 above.
- Example 9 In Example 1, the conductive polymer was changed to polyacetylene. Then, the ratio of the half-value width of the peak intensity corresponding to the benzoid structure to the half-value width of the peak intensity corresponding to the quinoid structure of the conductive polymer contained in the obtained electrode sheet was changed to 3.80. The pH of the aqueous conductive composition solution was changed to 4.0. Other than that, it was carried out in the same manner as in Example 1. The ratio of the half-value width of the peak intensity corresponding to the benzoid structure to the half-value width of the peak intensity corresponding to the quinoid structure was the same as in Example 1 above.
- polyacetylene was produced by using a tigranata catalyst and acetylene gas as raw materials.
- a tigranata catalyst tetrabutoxycitane and chiliethylaluminum dissolved in toluene were used.
- Example 1 In Example 1, the same as in Example 1 except that 2.00 parts by mass of sodium glyoxylate (“Safelink SPM-01”, manufactured by Mitsubishi Chemical Corporation) was added to the conductive composition as a cross-linking agent. went.
- 2.00 parts by mass of sodium glyoxylate (“Safelink SPM-01”, manufactured by Mitsubishi Chemical Corporation) was added to the conductive composition as a cross-linking agent. went.
- each component (conductive polymer, binder resin, cross-linking agent and plasticizer) contained in the conductive composition produced in this example is 100.00 parts by mass of the conductive composition, respectively. It was 7.06 parts by mass, 18.59 parts by mass, 37.17 parts by mass and 37.17 parts by mass.
- the ratio of the half-value width of the peak intensity corresponding to the benzoid structure to the half-value width of the peak intensity corresponding to the quinoid structure of the conductive polymer contained in the obtained electrode sheet was 0.40.
- Example 2 the ratio of the half-value width of the peak intensity corresponding to the benzoid structure to the half-value width of the peak intensity corresponding to the quinoid structure of the conductive polymer contained in the obtained electrode sheet is 15.00.
- the procedure was carried out in the same manner as in Example 1 except that the pH of the aqueous conductive composition solution was changed to 1.0 or less.
- the ratio of the half-value width of the peak intensity corresponding to the benzoid structure to the half-value width of the peak intensity corresponding to the quinoid structure was the same as in Example 1 above.
- Example 3 the ratio of the half width of the peak intensity corresponding to the benzoid structure to the half width of the peak intensity corresponding to the quinoid structure of the conductive polymer contained in the obtained electrode sheet was changed to 0.40. However, the procedure was the same as in Example 1 except that the pH of the aqueous conductive composition solution was changed to 12.0. The ratio of the half-value width of the peak intensity corresponding to the benzoid structure to the half-value width of the peak intensity corresponding to the quinoid structure was the same as in Example 1 above.
- Table 1 shows the measurement results of (value range) and pH, and the evaluation results of the conductivity and the effect on the skin of the obtained electrode sheet.
- the parentheses of each component in Table 1 are the weights when the total mass of the components excluding the solvent from the aqueous solution of the conductive composition is 100.00 parts by mass.
- the conductive composition aqueous solutions of Examples 1 to 9 include a quinoid structure and a benzoid structure as the molecular structure of the conductive polymer in the electrode sheet, and Raman spectroscopy.
- the ratio of the half width of the peak intensity corresponding to the quinoid structure to the half width of the peak intensity corresponding to the benzoid structure is set to 0.70 to 10.00 to enhance the conductivity and the conductivity.
- the effect on the skin could be suppressed. Therefore, when the conductive composition according to the present embodiment is used as a bioelectrode, the conductivity can be improved and rough skin can be suppressed. Therefore, it can be said that the biosensor can be effectively used to bring the biosensor into close contact with the skin of the subject and continuously measure the electrocardiogram for a long time (for example, 24 hours).
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Abstract
Description
本発明の実施形態に係る導電性組成物について説明する。本実施形態に係る導電性組成物は、導電性高分子及びバインダー樹脂を含み、導電性高分子はバインダー樹脂中に分散した状態で含まれている。
[電極シートの作製]
(導電性組成物の作製)
導電性高分子としてPEDOT/PSSのペレット(「Orgacon DRY」、日本アグフアマテリアルズ社製)0.38質量部と、バインダー樹脂として変性ポリビニルアルコールを含む水溶液(変性ポリビニルアルコール濃度:10%、「ゴーセネックスZ-410」、日本合成化学社製)10.00質量部と、可塑剤としてグリセリン(和光純薬社製)2.00質量部とを超音波浴に添加した。そして、これらの成分を含む水溶液を超音波浴で30分間混合し、均一な導電性組成物水溶液を調整した。
調整した導電性組成物水溶液をポリエチレンテレフタレート(PET)フィルム上にアプリケータを用いて塗工した。その後、導電性組成物水溶液が塗布されたPETフィルムを乾燥オーブン(SPHH-201、ESPEC社製)に搬送して、導電性組成物水溶液を120℃、10分間加熱乾燥することで、導電性組成物の硬化物を作製した。硬化物をプレスしてシート状に成形し、成形体として電極シート(生体電極)を作製した。
得られた電極シートの、キノイド構造に対応するピーク強度の半値幅に対するベンゾイド構造に対応するピーク強度の半値幅の比(ベンゾイド構造のピーク半値幅/キノイド構造のピーク半値幅)、pH、導電性及び肌への影響について評価した。
得られた電極シートを切片化して測定試料を準備した。測定試料の断面を以下の測定条件によりラマンスペクトルによる分光分析を行い、キノイド構造に由来するピーク及びベンゾイド構造に由来するピークを確認した。その結果、キノイド構造に由来するピーク半値幅が約53.4cm-1であり、ベンゾイド構造に由来するピーク半値幅が約233.4cm-1であり、キノイド構造に対応するピーク強度の半値幅に対するベンゾイド構造に対応するピーク強度の半値幅の比(ベンゾイド構造のピーク半値幅/キノイド構造のピーク半値幅)は、4.40であった。ラマンスペクトルの測定結果を図2に示す。
((測定条件))
点分析条件
測定装置:「LabRAM HR-800」、Jobin Yvon S.A.S社製
励起波長:633nm
測定波数範囲:1200cm-1~1600cm-1
検出器:CCD
得られた電極シートにリトマス試験紙を付けて、電極シートのpHを測定した。
得られた電極シートの抵抗値を測定し、導電性を下記基準で評価した。抵抗値が50Ω以下であった場合は、優良(表1では、Aと表記)と判断し、抵抗値が50Ω超え100Ω以下であった場合は、良好(表1では、Bと表記)と判断し、抵抗値が100Ω超え500Ω以下であった場合は、良(表1では、Cと表記)と判断し、抵抗値が500Ω超えた場合は、不良(表1では、Dと表記)と判断した。
((測定条件))
A:抵抗値が50Ω以下
B:抵抗値が50Ω超え100Ω以下
C:抵抗値が100Ω超え500Ω以下
D:抵抗値が500Ω超えた
得られた電極シートを被験者の肌に24時間貼り付けた後、電極シートを剥がし、電極シートが貼り付けられていた箇所の皮膚の肌荒れを目視で観察し、肌への影響を下記評価基準で評価した。肌荒れがなかった場合は、優良(表1では、Aと表記)と判断し、貼付部に少し赤みがあったが直ぐに消えた場合は、良好(表1では、Bと表記)と判断し、貼付部に赤みがあったが、痛みの生じない程度であった場合は、良(表1では、Cと表記)と判断し、貼付部に赤みが見られ、肌荒れが観察された場合は、不良(表1では、Dと表記)と判断した。
((測定条件))
A:肌荒れ無し
B:貼付部に生じた赤みが直ぐに消えた
C:貼付部に痛みの生じない赤みが発生
D:貼付部に生じた肌荒れが残った
実施例1において、導電性組成物に、架橋剤としてグリオキシル酸ナトリウム(「セーフリンクSPM-01」、三菱ケミカル社製)0.20質量部を添加したこと以外は、実施例1と同様にして行った。
実施例1において、導電性組成物に、架橋剤としてグリオキシル酸ナトリウム(「セーフリンクSPM-01」、三菱ケミカル社製)1.00質量部を添加したこと以外は、実施例1と同様にして行った。
実施例1において、得られた電極シートに含まれる導電性高分子のキノイド構造に対応するピーク強度の半値幅に対するベンゾイド構造に対応するピーク強度の半値幅の比が10.00となるように変更し、導電性組成物水溶液のpHが1.5以下となるように変更したこと以外は、実施例1と同様にして行った。キノイド構造に対応するピーク強度の半値幅に対するベンゾイド構造に対応するピーク強度の半値幅の比は、10.00に調製した。
実施例1において、得られた電極シートに含まれる導電性高分子の、キノイド構造に対応するピーク強度の半値幅に対するベンゾイド構造に対応するピーク強度の半値幅の比が3.00となるように変更し、導電性組成物水溶液のpHが7.0となるように変更したこと以外は、実施例1と同様にして行った。キノイド構造に対応するピーク強度の半値幅に対するベンゾイド構造に対応するピーク強度の半値幅の比は、上記の実施例1と同様にして行った。
実施例1において、得られた電極シートに含まれる導電性高分子の、キノイド構造に対応するピーク強度の半値幅に対するベンゾイド構造に対応するピーク強度の半値幅の比が2.00となるように変更し、導電性組成物水溶液のpHが9.0となるように変更したこと以外は、実施例1と同様にして行った。キノイド構造に対応するピーク強度の半値幅に対するベンゾイド構造に対応するピーク強度の半値幅の比は、上記の実施例1と同様にして行った。
実施例1において、導電性組成物に、架橋剤としてグリオキシル酸ナトリウム(「セーフリンクSPM-01」、三菱ケミカル社製)0.20質量部を添加した。そして、得られた電極シートに含まれる導電性高分子の、キノイド構造に対応するピーク強度の半値幅に対するベンゾイド構造に対応するピーク強度の半値幅の比が1.00となるように変更し、導電性組成物水溶液のpHが7.0となるように変更した。それ以外は、実施例1と同様にして行った。キノイド構造に対応するピーク強度の半値幅に対するベンゾイド構造に対応するピーク強度の半値幅の比は、上記の実施例1と同様にして行った。
実施例1において、導電性高分子をポリアニリン(「ポリアリニン(エメラルジン塩)」シグマアルドリッチ社製)に変更した。そして、得られた電極シートに含まれる導電性高分子の、キノイド構造に対応するピーク強度の半値幅に対するベンゾイド構造に対応するピーク強度の半値幅の比が3.20となるように変更し、導電性組成物水溶液のpHが4.0となるように変更した。それ以外は、実施例1と同様にして行った。キノイド構造に対応するピーク強度の半値幅に対するベンゾイド構造に対応するピーク強度の半値幅の比は、上記の実施例1と同様にして行った。
実施例1において、導電性高分子をポリアセチレンに変更した。そして、得られた電極シートに含まれる導電性高分子の、キノイド構造に対応するピーク強度の半値幅に対するベンゾイド構造に対応するピーク強度の半値幅の比が3.80となるように変更し、導電性組成物水溶液のpHが4.0となるように変更した。それ以外は、実施例1と同様にして行った。キノイド構造に対応するピーク強度の半値幅に対するベンゾイド構造に対応するピーク強度の半値幅の比は、上記の実施例1と同様にして行った。なお、ポリアセチレンは、原材料として、チグラーナッタ触媒とアセチレンガスを用いて生成した。チグラーナッタ触媒は、テトラブトキシシタンとチリエチルアルミニウムをトルエンに溶解させたものを用いた。
実施例1において、導電性組成物に、架橋剤としてグリオキシル酸ナトリウム(「セーフリンクSPM-01」、三菱ケミカル社製)2.00質量部を添加したこと以外は、実施例1と同様にして行った。
実施例1において、得られた電極シートに含まれる導電性高分子の、キノイド構造に対応するピーク強度の半値幅に対するベンゾイド構造に対応するピーク強度の半値幅の比が15.00となるように変更し、導電性組成物水溶液のpHが1.0以下となるように変更したこと以外は、実施例1と同様にして行った。キノイド構造に対応するピーク強度の半値幅に対するベンゾイド構造に対応するピーク強度の半値幅の比は、上記の実施例1と同様にして行った。
実施例1において、得られた電極シートに含まれる導電性高分子のキノイド構造に対応するピーク強度の半値幅に対するベンゾイド構造に対応するピーク強度の半値幅の比が0.40となるように変更し、導電性組成物水溶液のpHが12.0となるように変更したこと以外は、実施例1と同様にして行った。キノイド構造に対応するピーク強度の半値幅に対するベンゾイド構造に対応するピーク強度の半値幅の比は、上記の実施例1と同様にして行った。
Claims (7)
- バインダー樹脂及び導電性高分子を備え、
前記導電性高分子は、キノイド構造及びベンゾイド構造を有し、
ラマン分光法により得られるラマンスペクトルにおいて、前記キノイド構造に対応するピーク強度の半値幅に対する前記ベンゾイド構造に対応するピーク強度の半値幅の比が、0.5~12である導電性組成物。 - 前記ラマンスペクトルにおける、前記キノイド構造に対応するピークが1200cm-1~1480cm-1の範囲内であり、前記ベンゾイド構造に対応するピークが1485cm-1~1650cm-1の範囲内である請求項1に記載の導電性組成物。
- 前記導電性高分子は、ポリチオフェン系導電性高分子、ポリアニリン系導電性高分子、ポリアセチレン系導電性高分子、及びこれらの誘導体、並びにこれらの複合体からなる群から選択される一種以上の成分である請求項1又は2に記載の導電性組成物。
- 架橋剤を1.5質量部以下含む請求項1~3の何れか一項に記載の導電性組成物。
- 可塑剤を0.2質量部~150質量部含む請求項1~3の何れか一項に記載の導電性組成物。
- 請求項1~5の何れか一項に記載の導電性組成物の硬化物を備える生体電極。
- 請求項6に記載の生体電極を備える生体センサ。
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009283410A (ja) * | 2008-05-26 | 2009-12-03 | Alps Electric Co Ltd | 有機透明導電膜付き基材及びその製造方法 |
| JP2016000363A (ja) | 2015-10-05 | 2016-01-07 | 日本電信電話株式会社 | 体表面設置型電極、生体信号の測定方法、及び生体信号測定装置 |
| JP2016166436A (ja) | 2015-03-10 | 2016-09-15 | 日本合成化学工業株式会社 | 積層体、感熱記録媒体及びインクジェット記録媒体 |
| JP2019048945A (ja) * | 2017-09-11 | 2019-03-28 | 日東電工株式会社 | 導電性組成物および生体センサ |
| JP2020059652A (ja) | 2016-12-26 | 2020-04-16 | 参天製薬株式会社 | タフルプロストとクエン酸エステルとを含有するデポ剤 |
| JP2020192637A (ja) | 2019-05-28 | 2020-12-03 | 昭武 橋立 | 主軸の工具クランプ装置 |
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| JP5690833B2 (ja) | 2010-09-30 | 2015-03-25 | リンテック株式会社 | 電子デバイス及び電子デバイスの製造方法 |
| JP5760003B2 (ja) * | 2010-10-29 | 2015-08-05 | リンテック株式会社 | 透明導電性フィルム、電子デバイス及び電子デバイスの製造方法 |
| WO2012067490A1 (en) | 2010-11-15 | 2012-05-24 | Mimos Berhad | Ion selective electrode |
| CN103289617B (zh) * | 2012-02-29 | 2016-03-16 | Jsr株式会社 | 电极用粘结剂组合物、电极用浆料、电极和蓄电设备 |
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009283410A (ja) * | 2008-05-26 | 2009-12-03 | Alps Electric Co Ltd | 有機透明導電膜付き基材及びその製造方法 |
| JP2016166436A (ja) | 2015-03-10 | 2016-09-15 | 日本合成化学工業株式会社 | 積層体、感熱記録媒体及びインクジェット記録媒体 |
| JP2016000363A (ja) | 2015-10-05 | 2016-01-07 | 日本電信電話株式会社 | 体表面設置型電極、生体信号の測定方法、及び生体信号測定装置 |
| JP2020059652A (ja) | 2016-12-26 | 2020-04-16 | 参天製薬株式会社 | タフルプロストとクエン酸エステルとを含有するデポ剤 |
| JP2019048945A (ja) * | 2017-09-11 | 2019-03-28 | 日東電工株式会社 | 導電性組成物および生体センサ |
| JP2020192637A (ja) | 2019-05-28 | 2020-12-03 | 昭武 橋立 | 主軸の工具クランプ装置 |
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|---|
| See also references of EP4130161A4 |
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| US12527506B2 (en) | 2026-01-20 |
| EP4130161A1 (en) | 2023-02-08 |
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