WO2023182037A1 - 構造体 - Google Patents
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- WO2023182037A1 WO2023182037A1 PCT/JP2023/009554 JP2023009554W WO2023182037A1 WO 2023182037 A1 WO2023182037 A1 WO 2023182037A1 JP 2023009554 W JP2023009554 W JP 2023009554W WO 2023182037 A1 WO2023182037 A1 WO 2023182037A1
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- C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
- C09C3/00—Treatment in general of inorganic materials, other than fibrous fillers, to enhance their pigmenting or filling properties
- C09C3/12—Treatment with organosilicon compounds
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- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
- B01J20/28002—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their physical properties
- B01J20/28004—Sorbent size or size distribution, e.g. particle size
- B01J20/28007—Sorbent size or size distribution, e.g. particle size with size in the range 1-100 nanometers, e.g. nanosized particles, nanofibers, nanotubes, nanowires or the like
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/06—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising oxides or hydroxides of metals not provided for in group B01J20/04
- B01J20/08—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising oxides or hydroxides of metals not provided for in group B01J20/04 comprising aluminium oxide or hydroxide; comprising bauxite
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- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/10—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising silica or silicate
- B01J20/103—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising silica or silicate comprising silica
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/30—Processes for preparing, regenerating, or reactivating
- B01J20/32—Impregnating or coating ; Solid sorbent compositions obtained from processes involving impregnating or coating
- B01J20/3231—Impregnating or coating ; Solid sorbent compositions obtained from processes involving impregnating or coating characterised by the coating or impregnating layer
- B01J20/3242—Layers with a functional group, e.g. an affinity material, a ligand, a reactant or a complexing group
- B01J20/3244—Non-macromolecular compounds
- B01J20/3246—Non-macromolecular compounds having a well defined chemical structure
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/30—Processes for preparing, regenerating, or reactivating
- B01J20/32—Impregnating or coating ; Solid sorbent compositions obtained from processes involving impregnating or coating
- B01J20/3291—Characterised by the shape of the carrier, the coating or the obtained coated product
- B01J20/3293—Coatings on a core, the core being particle or fiber shaped, e.g. encapsulated particles, coated fibers
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- C09C1/00—Treatment of specific inorganic materials other than fibrous fillers; Preparation of carbon black
- C09C1/04—Compounds of zinc
- C09C1/043—Zinc oxide
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- C09C1/00—Treatment of specific inorganic materials other than fibrous fillers; Preparation of carbon black
- C09C1/28—Compounds of silicon
- C09C1/30—Silicic acid
- C09C1/3045—Treatment with inorganic compounds
- C09C1/3054—Coating
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- C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
- C09C1/00—Treatment of specific inorganic materials other than fibrous fillers; Preparation of carbon black
- C09C1/28—Compounds of silicon
- C09C1/30—Silicic acid
- C09C1/3081—Treatment with organo-silicon compounds
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- C09C1/00—Treatment of specific inorganic materials other than fibrous fillers; Preparation of carbon black
- C09C1/36—Compounds of titanium
- C09C1/3607—Titanium dioxide
- C09C1/3653—Treatment with inorganic compounds
- C09C1/3661—Coating
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- C09C1/00—Treatment of specific inorganic materials other than fibrous fillers; Preparation of carbon black
- C09C1/36—Compounds of titanium
- C09C1/3607—Titanium dioxide
- C09C1/3684—Treatment with organo-silicon compounds
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- C09C1/00—Treatment of specific inorganic materials other than fibrous fillers; Preparation of carbon black
- C09C1/40—Compounds of aluminium
- C09C1/407—Aluminium oxides or hydroxides
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- C09C3/00—Treatment in general of inorganic materials, other than fibrous fillers, to enhance their pigmenting or filling properties
- C09C3/06—Treatment with inorganic compounds
- C09C3/063—Coating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y20/00—Nanooptics, e.g. quantum optics or photonic crystals
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y30/00—Nanotechnology for materials or surface science, e.g. nanocomposites
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/60—Particles characterised by their size
- C01P2004/64—Nanometer sized, i.e. from 1-100 nanometer
Definitions
- the present disclosure relates to, for example, a structure using nanoparticles.
- Patent Document 1 discloses a nanocomposite resin composition containing a thermosetting resin or a thermoplastic resin, a silane coupling agent, and two types of inorganic fillers having different particle sizes or lengths.
- One of the two types of inorganic fillers is an inorganic particle made of one or more of Al 2 O 3 , MgO, TiO 2 and AlN, and forms a SiO 2 coating on its surface. This improves adhesion with resin, improves mechanical properties and thermal conductivity, and ensures long-term reliability as an insulating material.
- high light transmittance is desired for glass materials constituting optical components, glass substrates, and the like.
- a structure according to an embodiment of the present disclosure has a core portion and a surface modification portion covalently bonded to the core portion, and a distance between a radius a of the core portion and a length b of the surface modification portion is 0 ⁇ a/b. It is formed by stacking a plurality of nanoparticles satisfying the relationship of ⁇ 2.73.
- a structure according to an embodiment of the present disclosure has a core portion and a surface modification portion covalently bonded to the core portion, and a distance between the radius a of the core portion and the length b of the surface modification portion is 0 ⁇ a/b.
- a plurality of nanoparticles satisfying the relationship of ⁇ 2.73 were used to form the nanoparticles. As a result, a nonporous body without voids G between the plurality of nanoparticles 10 can be obtained.
- FIG. 1 is a schematic diagram showing an example of a schematic configuration of a structure according to an embodiment of the present disclosure.
- 2 is a diagram illustrating an example of the structure of nanoparticles shown in FIG. 1.
- FIG. FIG. 2 is a diagram illustrating another example of the structure of nanoparticles shown in FIG. 1.
- FIG. FIG. 2 is a diagram illustrating the basis of the relationship between the radius of the core portion of a nanoparticle and the length of a surface modification portion.
- FIG. 2 is a diagram illustrating the basis of the relationship between the radius of the core portion of a nanoparticle and the length of a surface modification portion.
- FIG. 2 is a diagram illustrating the basis of the relationship between the radius of the core portion of a nanoparticle and the length of a surface modification portion.
- FIG. 2 is a diagram illustrating the basis of the relationship between the radius of the core portion of a nanoparticle and the length of a surface modification portion.
- FIG. 1 is a schematic diagram showing an example of
- FIG. 2 is a diagram illustrating the basis of the relationship between the radius of the core portion of a nanoparticle and the length of a surface modification portion.
- FIG. 2 is a characteristic diagram showing the relationship between the ratio of the radius of the core portion of the nanoparticle to the length of the surface modification portion and the ratio of the core portion to the nanocomposite.
- FIG. 3 is a characteristic diagram showing the relationship between the particle diameter and transmittance in terms of the ratio of the radius of the core portion of each nanoparticle to the length of the surface modification portion. It is an image diagram when the structure of this embodiment is photographed using a transmission electron microscope.
- FIG. 3 is a characteristic diagram showing the relationship between the diameter of the core portion and the number of surface-modified molecules.
- FIG. 2 is a flowchart illustrating an example of a manufacturing process for the structure shown in FIG. 1.
- FIG. It is an image diagram when the structure of this embodiment is photographed using a transmission electron microscope.
- FIG. 1 is a schematic diagram showing an example of a schematic configuration of a nanocomposite formed using a general method.
- FIG. 2 is a schematic diagram showing another example of the schematic structure of a nanocomposite formed using a general method.
- Embodiments of the present technology will be described in detail below with reference to the drawings.
- the following description is a specific example of the present disclosure, and the present disclosure is not limited to the following embodiments. Further, the present disclosure is not limited to the arrangement, dimensions, dimensional ratio, etc. of each component shown in each figure.
- the order of explanation is as follows. 1.
- Embodiment (Example of a structure formed by stacking a plurality of nanoparticles each having a core portion having a predetermined radius and a surface modification portion having a predetermined length) 1-1.
- Action/Effect 2 Examples of using structures
- FIG. 1 schematically represents an example of a schematic configuration of a structure (structure 1) according to an embodiment of the present disclosure.
- FIG. 2 is a diagram illustrating an example of the structure of the nanoparticle 10 shown in FIG. 1.
- FIG. 3 is a diagram illustrating another example of the structure of the nanoparticle 10 shown in FIG. 1.
- the structure 1 is, for example, a nanocomposite that can be used as a substitute material for a glass substrate or a light-transmitting plastic.
- the structure 1 of the present embodiment has a core part 11 and a surface modification part 12 covalently bonded to the core part 11, and the distance between the radius a of the core part 11 and the length b of the surface modification part 12 is 0 ⁇ It is a non-porous body formed by stacking a plurality of nanoparticles 10 satisfying the relationship of a/b ⁇ 2.73, and exhibits a type II adsorption/desorption isotherm according to IUPAC classification with respect to a predetermined substrate.
- the adsorption/desorption isotherm can be measured according to JIS standard Z8831-1:2010.
- the plurality of nanoparticles 10 are composed of the core part 11 and the surface modification part 12.
- the core portion 11 is a composite oxide of metal atoms that has oxidation resistance. Specifically, it is an oxide of zirconium (Zr), titanium (Ti), tin (Sn), silicon (Si), aluminum (Al), or zinc (Zn) that has optical transparency. Furthermore, oxides of tungsten (W) or yttrium (Y) that are colored but have optical transparency can also be used. Among the metal oxides mentioned above, it is preferable to use Si oxide or Al oxide, which have a low refractive index and particularly high light transmittance, for the core portion 11 .
- the surface modification portions 12 are for filling the gaps G between a plurality of adjacent nanoparticles 10 when forming the structure 1. Further, the surface modification portion 12 is for covering the surface of the core portion 11 to prevent aggregation of the plurality of core portions 11.
- the surface modification portion 12 is configured to include, for example, a plurality of organic silane molecules 121.
- the organic silane molecule 121 include those that form a covalent bond with the core portion 11 and have a reactive functional group.
- the nanoparticles 10 are covalently bonded to each other via the reactive functional groups of the respective organic silane molecules 121, and the mechanical strength of the structure 1 is improved.
- the reactive functional group include a vinyl group, a methacrylic group, an acrylic group, a glycidyl group, a mercapto group, an amino group, a hydrosilyl group, a hydroxyl group, a carboxyl group, a cyano group, an amino group, and a cyano group.
- Examples of the organic silane molecule 121 having the above-mentioned reactive functional group include an organic silane compound represented by the following general formula (1) or general formula (2).
- [Chemical formula 1] R 1 X Si(OR 2 ) 4-X ...(1) R 1 X SiCl 4-X ...(2)
- R 1 is a hydrogen atom, a vinyl group, an acryloxy group, a methacryloxy group, an aminopropyl group, a glycidoxypropyl group, or a mercaptopropyl group.
- R 2 is a methyl group, an ethyl group, a propyl group, or an isopropyl group.
- (X is an integer of 3 or less.)
- the surface modification portion 12 is configured to include, for example, an organometallic molecule 122 that does not have a reactive functional group. As a result, the structure 1 can be redissolved in a predetermined solvent, making recycling and manufacturing repair possible.
- organometallic molecule 122 without a reactive functional group include organometallic compounds represented by the following general formula (3) or general formula (4).
- R 3 is any one of a methyl group, an ethyl group, a propyl group, an isopropyl group, a butyl group, a pentyl group, a hexyl group, a heptyl group, an octyl group, a decyl group, a dodecyl group, a hexadecyl group, a vinyl group, and a phenyl group.
- R4 is any one of a methyl group, an ethyl group, a propyl group, and an isopropyl group.
- M is any one of Si, Al, Ti, Sn, and Zn.
- X is an integer of 3 or less .
- organosilane molecules 121 and organometallic molecules 122 covering the surface of the core part 11 and the mode of bonding between the core part 11 and the organosilane molecules 121 or organometallic molecules 122 can be determined by, for example, component analysis or composition analysis. It can be confirmed by Component analysis and compositional analysis are performed using Fourier transform infrared spectroscopy (FT-IR), gas chromatography (GC), X-ray photoelectron spectroscopy (XPS), nuclear magnetic resonance spectroscopy (NMR), and energy dispersive X-ray analysis (EDX).
- FT-IR Fourier transform infrared spectroscopy
- GC gas chromatography
- XPS X-ray photoelectron spectroscopy
- NMR nuclear magnetic resonance spectroscopy
- EDX energy dispersive X-ray analysis
- the presence or absence of the organosilane molecules 121 and organometallic molecules 122 covering the surface of the core part 11 and the bonding mode between the core part 11 and the organosilane molecules 121 or the organometallic molecules 122 can be determined using one of the above analysis methods or Can be analyzed using multiple techniques.
- the length b of the surface modification portion 12 with respect to the radius a of the core portion 11 is such that a relationship of 0 ⁇ a/b ⁇ 2.73 holds true.
- FIG. 4A to 5B explain the basis of the relationship between the radius a of the core portion 11 of the nanoparticle 10 and the length b of the surface modification portion 12.
- a plurality of nanoparticles 10 dispersed in an organic solvent in the manufacturing process of the structure 1 described later may be separated from the surface modification portion 12 as shown in FIG. 4A.
- the surfaces of the nanoparticles 10 are in contact with each other, and the nanoparticles 10 are dispersed with gaps G between them.
- FIG. 4B shows that as packing progresses due to the volatilization of the organic solvent after coating on the substrate, as shown in FIG. 4B.
- the surface modified portions 12 overlap each other to form a close-packed structure, and the voids G between adjacent nanoparticles 10 are filled (non-porous material).
- the surface modification part 12 is shorter than the core part 11, as shown in FIG. 5A, the plurality of nanoparticles 10 dispersed in an organic solvent have the surfaces of the surface modification parts 12 mutually similar to FIG. 4A.
- the nanoparticles 10 are in contact with each other and are dispersed with gaps G between them, even if packing progresses due to the volatilization of the organic solvent after coating on a substrate etc., the gap between the nanoparticles 10 and the adjacent nanoparticles 10 remains A gap G remains as shown in FIG. 5B.
- This void G causes a decrease in the transparency of the structure 1.
- the length b of the surface modification part 12 with respect to the radius a of the core part 11 is calculated as a/b.
- FIG. 6 shows the relationship between the ratio of the radius a of the core portion 11 of the nanoparticle 10 to the length b of the surface modification portion 12 and the ratio of the core portion 11 in the nanocomposite.
- the optical characteristics and temperature characteristics of the structure 1 can be controlled by adjusting the a/b ratio. At that time, there is no limit to the lower limit value and it becomes 0. Furthermore, when adjusting the strength and thermal properties of the structure 1, it is effective to add 1% or more of nanoparticles to a general nanocomposite. becomes 0.2. Therefore, the ratio between the radius a of the core portion 11 and the length b of the surface modification portion 12 is preferably 0 ⁇ a/b ⁇ 2.73, more preferably 0.2 ⁇ a/b ⁇ 2. It becomes .73.
- the structure 1 When the structure 1 is used as an optical member, it is preferable that the structure 1 has a predetermined light transmittance.
- the structure 1 has a transmittance of 70% or more, for example, and can be used as an antireflection film for automobile window glass and the like.
- the structure 1 can be used, for example, as a window glass of a building, a glass substrate, or a substitute material for plastics, by having a transmittance of 90% or more.
- a structure 1 with a thickness of 1 mm is formed, and the refractive index of the core portion 11 is set to 2.2.
- the particle diameter here refers to the diameter (2a) of the core portion 11.
- the primary particle diameter (diameter of the core portion 11) of the nanoparticles 10 is determined as follows.
- the structure 1 to be measured is processed into a thin section by the FIB method or the like.
- a carbon film and a tungsten thin film are formed as a protective film as a pretreatment for observing a TEM image of a cross section, which will be described later.
- the carbon film is formed on the surface of the structure 1 by a vapor deposition method.
- the tungsten thin film is formed on the surface of the structure 1 by a vapor deposition method or a sputtering method.
- the cross section of the structure 1 is formed by thinning.
- the cross section of the obtained thin sample was observed using a transmission electron microscope (Tecnai G2 manufactured by FEI) at an accelerating voltage of 200 kV so that a plurality of nanoparticles 10 could be observed in a field of view of 50 nm x 50 nm, and a TEM photograph was taken. Take a photo. Note that the imaging position is randomly selected from the thin section sample.
- FIG. 8 is an image diagram of a TEM photograph taken of the structure 1 using a transmission electron microscope. For example, in FIG. 8, nanoparticles A and B are selected whose diameters can be clearly seen. On the other hand, for example, nanoparticles C and nanoparticles D are not suitable as measurement targets because the nanoparticles 10 overlap in the depth direction of observation and their shapes cannot be confirmed. The maximum diameter of each of the 50 selected nanoparticles 10 is measured.
- the maximum diameter is the maximum distance between two parallel lines drawn from any angle so as to touch the contour of the nanoparticle 10 (so-called maximum Feret diameter).
- maximum Feret diameter the diameter of the particle portion excluding the alkoxy group or reactive functional group modified on the surface of the nanoparticle 10 is measured.
- the median value of the 50 maximum diameters (maximum Feret diameter) thus determined, the primary particle diameter (average particle diameter) of the nanoparticles 10 can be obtained.
- FIG. 9 shows the relationship between the diameter (2a) of the core portion 11 and the number of surface modification molecules (organosilane molecules 121 or organometallic molecules 122).
- the surface modification portions 12 are for filling the gaps G between the nanoparticles 10 and preventing the nanoparticles 10 from aggregating with each other. For this reason, it is desirable that the surface of the core part 11 be sufficiently covered with the surface modification part 12.
- Figure 9 shows the number of surface-modifying molecules required per gram of particles with particle size d (nm) when the particle density is 4.3 g/cm 3 and the exclusive area covered by one molecule is 0.16 nm 2 . It represents M (mol), and by reacting molecules of the same or higher size, the surface of the particles can be sufficiently modified. Note that if sufficient surface modification is not performed, the particles will aggregate and voids will be formed between the particles. Expressing this mathematically, M>0.015/d.
- FIG. 10 shows a flow as an example of the manufacturing process of the structure 1. As shown in FIG.
- the core portion 11 of the nanoparticle 10 is synthesized using a liquid phase method (step S101).
- a liquid phase method In general, methods for producing nanoparticles are roughly divided into two types: gas phase method and liquid phase method.
- the minute core part 11 with a diameter of 10 nm or less can be isolated without agglomeration by using the liquid phase method. can do.
- a metal alkoxide molecule represented by the following general formula (5) that can form a three-dimensional metal oxide skeleton (M-O-M) through a hydrolysis reaction and a polycondensation reaction is used. You can choose.
- the metal alkoxide molecule may be a molecule in which some of the alkoxy groups are substituted with non-hydrolyzable functional groups, and there is no problem in forming the metal oxide skeleton.
- R 5 is a methyl group, an ethyl group, a propyl group, an isopropyl group, a butyl group, a pentyl group, a hexyl group, a heptyl group, an octyl group, a decyl group, a dodecyl group, a hexadecyl group, a vinyl group, a phenyl group, an acryloxy group, It is either a methacryloxy group, an aminopropyl group, a glycidoxypropyl group, or a mercaptopropyl group.
- R 6 is a hydrogen atom, a methyl group, an ethyl group, a propyl group, or an isopropyl group.
- M is Si , Al, Ti, Sn, and Zn.
- Z is 0 or an integer of 2 or less.
- the surface of the formed core portion 11 may be coated with amphiphilic molecules such as surfactant molecules, amino acid molecules, and polymer molecules. Thereby, in the next step of surface modification of the core portions 11, aggregation of the plurality of core portions 11 in the dispersion liquid can be prevented.
- the method is not limited to the above manufacturing method as long as the diameter of the final nanoparticles 10 is 7 nm or less.
- Examples of references are listed below.
- Document 1 A. A. Burns et al. Nano Lett. 2009, 9, 1, 442-448
- Literature 2 S. Sakamoto et al. Langmuir 2018, 34, 1711-1717
- nanoparticles By coating the particle surface with surfactant molecules, nanoparticles can be isolated without agglomeration.
- various changes may be made to the above manufacturing method.
- the drying method described in Reference 1 or Reference 2 may be replaced with a drying process using a vacuum concentration device such as a rotary evaporator. Thereby, mass productivity can be improved.
- step S102 surface modification is performed by dispersing the plurality of core parts 11 in a solvent (step S102).
- An organic silane compound represented by the above general formula (1) or general formula (2) is added to a dispersion liquid in which a plurality of core parts 11 are dispersed. After adding the organic silane compound, heating is performed as necessary. Thereby, the core part 11 and the organic silane compound react to form a covalent bond, and the surface modification part 12 is formed around the core part 11.
- the amphipathic molecules are removed from the surface of the core part 11 by heating after adding the organosilane compound, and the surface of the core part 11 is coated with the amphiphilic molecules.
- the organic silane molecules 121 are covalently bonded to the silane molecules.
- the plurality of nanoparticles 10 do not necessarily need to be connected to each other, and an organometallic compound having no reactive functional group represented by the above general formula (3) or general formula (4) may be added to the dispersion.
- the surface modification portion 12 may be formed of an organometallic compound.
- step S104 the solvent component is evaporated to obtain the structure 1 (step S104).
- methods for volatilizing the solvent include raising the temperature at normal pressure and drying under reduced pressure.
- a strong Structure 1 can be obtained.
- the structure 1 integrated film
- the crosslinking reaction is an organic reaction such as radical polymerization, cationic polymerization, or anionic polymerization
- a suitable reaction initiator may be added to the integrated film.
- the aspect of the structure 1 can be confirmed, for example, by using the following method.
- the structure 1 is divided into insoluble samples and dissolved samples depending on whether it dissolves in the following solvents.
- a solvent alcohols (selected from methanol, ethanol, 1-propanol, 2-propanol, 1-decanol, benzyl alcohol, ethylene glycol), ketones (selected from acetone, methyl ethyl ketone, methyl isobutyl ketone), ethers (diethyl (selected from ether, diphenyl ether, tetrahydrofuran) or hydrocarbons (selected from hexane, octane, decane, dodecane, cyclohexane).
- the radius a of the nanoparticle 10 (core part 11) and the length b of the surface modification part can both be calculated from the TEM image.
- the radius a of the nanoparticle 10 (core part 11) can be calculated from the TEM image, and the length b of the surface modification part can be calculated from the NMR analysis result.
- FIG. 11 is an image diagram of a TEM photograph.
- the radius a of the nanoparticle 10 (core portion 11) can be obtained by using the method for measuring the primary particle diameter (diameter of the core portion 11) of the nanoparticle 10 described above.
- the length b of the surface modification portion is defined as the portion of the line segment connecting the center of the nanoparticle and the center of the nanoparticle closest to the nanoparticle that is not connected to both particles. For example, as shown in FIG. 11, the distance F between the nanoparticle E and the nearest nanoparticle is counted, and the distances (for example, the distance G) with other nanoparticles are not counted.
- Select 50 arbitrary nanoparticles measure the 50 points, and calculate the average value.
- the following measurement method is used.
- NMR nuclear magnetic resonance apparatus
- JNM-ECZ 500 manufactured by JEOL Ltd. is used as the nuclear magnetic resonance apparatus.
- 100 mg of a sample is dissolved in 600 ⁇ L of chloroform or tetrahydrofuran containing deuterium, and then 10 mg of acelylacetone chromium is added and placed in a dedicated 5 mm glass tube. This is measured at resonance frequencies of 495 MHz, 125.76 MHz and 99.36 MHz and relaxation times of 4 seconds, 2 seconds and 10 seconds for the nuclides 1H, 13C and 29Si.
- Tetramethylsilane is set at 0 ppm as an internal standard.
- the number of atoms constituting the longest main chain is set as X
- the structure 1 of this embodiment has a core part 11 and a surface modification part 12 covalently bonded to the core part 11, and the distance between the radius a of the core part 11 and the length b of the surface modification part 12 is 0 ⁇
- a plurality of nanoparticles 10 satisfying the relationship a/b ⁇ 2.73 were used to form the nanoparticles. This will be explained below.
- Glass has characteristics such as high transparency, durability, mechanical strength, hardness, and stability, and is widely used in industrial fields, not only in window glass, mirrors, lenses, and tableware, but also in optical components and substrates. .
- Glass is a composite oxide of various metal atoms, and generally metal atoms (M) form a three-dimensional covalent bond network with oxygen atoms (O) through M-OM bonds. .
- M metal atoms
- O oxygen atoms
- a problem in manufacturing such as melting the raw material at a high temperature of 1000° C. or higher, which imposes a large environmental burden.
- Another problem with common glass materials is that they cannot be composited with organic substances or metals.
- common glass materials have a problem in that they have a poor degree of freedom in shape.
- a method for producing glass at low temperatures has been developed, for example, by using a metal alkoxide or a sodium salt as a precursor and subjecting it to hydrolysis and condensation polymerization.
- a metal alkoxide or a sodium salt as a precursor
- hydrolysis and condensation polymerization even when the above method is used, there is a risk that the characteristics of glass may be lost due to opacity due to shrinkage during polycondensation, generation of cracks, etc. Therefore, plastic is used as an alternative material because it is easier to mold at lower temperatures, although it is inferior to glass in terms of durability and strength.
- a nanocomposite is an organic-inorganic composite compound material in which inorganic particles are dispersed in a polymer resin in which an organic compound is polymerized.
- a nanocomposite using a curable resin as a polymer resin as shown in FIG.
- the nanoparticles 110 have a structure in which they are not connected to each other.
- a plurality of nanoparticles 110 and a resin 120 and a plurality of nanoparticles 110 have a structure in which they are not connected to each other.
- These common nanocomposites have properties similar to glass and can be manufactured at low temperatures.
- the present embodiment has a core portion 11 and a surface modification portion 12 covalently bonded to the core portion 11, and the distance between the radius a of the core portion 11 and the length b of the surface modification portion 12 is 0 ⁇
- a plurality of nanoparticles 10 satisfying the relationship a/b ⁇ 2.73 were used to form the nanoparticles. As a result, a nonporous body without voids G between the plurality of nanoparticles 10 can be obtained.
- the structure 1 of the present embodiment it is possible to provide a nanocomposite having high light transmittance without phase separation or voids, which can be used as a substitute material for glass materials, for example. Become.
- the surface modification portion 12 by forming the surface modification portion 12 using an organic metal molecule 122 that does not have a reactive functional group, it becomes possible to redissolve it in a predetermined solvent. Therefore, even if foreign matter is mixed in due to equipment malfunction during manufacturing, recycling or manufacturing repair is possible, and production yield can be improved.
- the structure 1 according to the embodiment described above can be used not only for window glass, mirrors, lenses, and tableware, but also for various cases as described below.
- the structure 1 can be used as glass for building materials, automobiles, displays, ornaments, home appliances, etc.
- building materials it can be used for window glass, design glass, interior glass, and glass coating.
- automobiles it can be used in windshields, display cover glasses, and privacy glass.
- displays it can be used for glass substrates for flat panel displays and cover glasses for touch panels.
- decorative items it can be used for tableware, vases, and tiles.
- home appliances it can be used as a constituent material for lighting and small home appliances.
- the structure 1 can be used as a substitute material for plastic resins used in electronic device housings, space/aerospace/automotive applications, building materials, housing equipment, decorations, food and beverage containers, coatings, etc. can.
- plastic resins used in electronic device housings, space/aerospace/automotive applications, building materials, housing equipment, decorations, food and beverage containers, coatings, etc. can.
- it can be used for exterior parts such as bumpers and radiator grills.
- As a building material it can be used for interior/exterior materials, insulation materials, piping materials, and civil engineering materials.
- decorative items it can be used for tableware, vases, lighting, and small home appliances.
- the structure 1 can be molded or spun to produce clothing, fabrics, sporting goods, construction materials, housing materials, industrial materials, reinforcing cloths, fiber-reinforced plastics for space and aviation applications, automotive applications, and communications. It can be used as an alternative material for fibers used in commercial cables, etc.
- plastic alternative materials have a lower plastic content than conventional nanocomposite materials and plastic materials, and the main raw materials are biocompatible and hydrolyzable, so even if they leak into the ocean, they will not be harmful to living organisms. The risk of becoming waste is reduced. Furthermore, since the main ingredient generated when incinerated is water vapor, it is expected that the greenhouse gas emitted will be smaller than that of plastic materials, so it can contribute to preventing ocean pollution and global warming.
- the present technology can also have the following configuration.
- [3] The structure according to [1] or [2], wherein the plurality of nanoparticles have a primary particle diameter of 7 nm or less.
- R 3 is any one of a methyl group, an ethyl group, a propyl group, an isopropyl group, a butyl group, a pentyl group, a hexyl group, a heptyl group, an octyl group, a decyl group, a dodecyl group, a hexadecyl group, a vinyl group, and a phenyl group.
- R4 is any one of a methyl group, an ethyl group, a propyl group, and an isopropyl group.
- M is any one of Si, Al, Ti, Sn, and Zn.
- X is an integer of 3 or less .
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Abstract
Description
1.実施の形態(所定の半径を有するコア部および所定の長さを有する表面修飾部を有する複数のナノ粒子が積層してなる構造体の例)
1-1.構造体の構成
1-2.構造体の製造方法
1-3.作用・効果
2.構造体の使用例
図1は、本開示の一実施の形態に係る構造体(構造体1)の概略構成の一例を模式的に表したものである。図2は、図1に示したナノ粒子10の構造の一例を説明する図である。図3は、図1に示したナノ粒子10の構造の他の例を説明する図である。構造体1は、例えば、ガラス基板や光透過性を有するプラスチックの代替材料として用いることができるナノコンポジットである。
本実施の形態の構造体1は、コア部11およびコア部11と共有結合した表面修飾部12を有し、コア部11の半径aと表面修飾部12の長さbとの間に0<a/b≦2.73の関係が成り立つ複数のナノ粒子10が積層してなる無孔質体であり、所定の基体に対して、IUPAC分類におけるII型の吸脱着等温線を示す。吸脱着等温線は、JIS規格Z8831-1:2010にならって測定することができる。
[化1]
R1 XSi(OR2)4-X・・・(1)
R1 XSiCl4-X・・・(2)
(R1は、水素原子、ビニル基、アクリロキシ基、メタアクリロキシ基、アミノプロピル基、グリシドキシプロピル基およびメルカプトプロピル基のいずれかである。R2は、メチル基、エチル基、プロピル基およびイソプロピル基のいずれかである。Xは3以下の整数である。)
[化2]
R3 XM(OR4)4-X・・・(3)
R3 XMCl4-X・・・(4)
(R3は、メチル基、エチル基、プロピル基、イソプロピル基、ブチル基、ペンチル基、ヘキシル基、ヘプチル基、オクチル基、デシル基、ドデシル基、ヘキサデシル基、ビニル基およびフェニル基のいずれかである。R4は、メチル基、エチル基、プロピル基およびイソプロピル基のいずれかである。Mは、Si,Al,Ti,SnおよびZnのいずれかである。Xは、3以下の整数である。)
図10は、構造体1の製造工程の一例としての流れを表したものである。
[化3]
R5 ZM(OR6)4-Z・・・(5)
(R5は、メチル基、エチル基、プロピル基、イソプロピル基、ブチル基、ペンチル基、ヘキシル基、ヘプチル基、オクチル基、デシル基、ドデシル基、ヘキサデシル基、ビニル基、フェニル基、アクリロキシ基、メタアクリロキシ基、アミノプロピル基、グリシドキシプロピル基およびメルカプトプロピル基のいずれかである。R6は、水素原子、メチル基、エチル基、プロピル基およびイソプロピル基のいずれかである。Mは、Si,Al,Ti,SnおよびZnのいずれかである。Zは、0または2以下の整数である。)
[数1]
b=0.15+0.1265*X・・・(1)
本実施の形態の構造体1では、コア部11およびコア部11と共有結合した表面修飾部12を有し、コア部11の半径aと表面修飾部12の長さbとの間に0<a/b≦2.73の関係が成り立つ複数のナノ粒子10を用いて形成するようにした。以下、これについて説明する。
上記実施の形態に係る構造体1は、例えば、窓ガラスや鏡、レンズ、食器に限らず、以下のような様々はケースに使用することができる。
[1]
コア部および前記コア部と共有結合した表面修飾部を有し、前記コア部の半径aと前記表面修飾部の長さbとの間に0<a/b≦2.73の関係が成り立つ複数のナノ粒子が積層してなる
構造体。
[2]
IUPAC分類においてII型の吸脱着等温線を示す、前記[1]に記載の構造体。
[3]
前記複数のナノ粒子の一次粒子径は7nm以下である、前記[1]または[2]に記載の構造体。
[4]
前記複数のナノ粒子の一次粒子径は5nm以下である、前記[1]または[2]に記載の構造体。
[5]
前記複数のナノ粒子のそれぞれの前記コア部は金属酸化物である、前記[1]乃至[4]のうちのいずれか1つに記載の構造体。
[6]
前記複数のナノ粒子のそれぞれの前記コア部は、ジルコニウム、チタン、スズ、シリコン、アルミニウムまたは亜鉛の酸化物である、前記[1]乃至[5]のうちのいずれか1つに記載の構造体。
[7]
前記複数のナノ粒子のそれぞれの前記コア部は、シリコンまたはアルミニウムの酸化物である、前記[1]乃至[5]のうちのいずれか1つに記載の構造体。
[8]
前記表面修飾部は反応性官能基を含む、前記[1]乃至[7]のうちのいずれか1つに記載の構造体。
[9]
前記反応性官能基を有する前記表面修飾部は、下記一般式(1)または(2)で表される有機シラン化合物からなる、前記[8]に記載の構造体。
[化1]
R1 XSi(OR2)4-X・・・(1)
R1 XSiCl4-X・・・(2)
(R1は、水素原子、ビニル基、アクリロキシ基、メタアクリロキシ基、アミノプロピル基、グリシドキシプロピル基およびメルカプトプロピル基のいずれかである。R2は、メチル基、エチル基、プロピル基およびイソプロピル基のいずれかである。Xは3以下の整数である。)
[10]
前記表面修飾部は反応性官能基を含まない、前記[1]乃至[7]のうちのいずれか1つに記載の構造体。
[11]
前記反応性官能基を含まない前記表面修飾部は、下記一般式(3)または(4)で表される、反応性官能基を持たない有機金属化合物である、前記[10]に記載の構造体。
[化2]
R3 XM(OR4)4-X・・・(3)
R3 XMCl4-X・・・(4)
(R3は、メチル基、エチル基、プロピル基、イソプロピル基、ブチル基、ペンチル基、ヘキシル基、ヘプチル基、オクチル基、デシル基、ドデシル基、ヘキサデシル基、ビニル基およびフェニル基のいずれかである。R4は、メチル基、エチル基、プロピル基およびイソプロピル基のいずれかである。Mは、Si,Al,Ti,SnおよびZnのいずれかである。Xは、3以下の整数である。)
Claims (11)
- コア部および前記コア部と共有結合した表面修飾部を有し、前記コア部の半径aと前記表面修飾部の長さbとの間に0<a/b≦2.73の関係が成り立つ複数のナノ粒子が積層してなる
構造体。 - IUPAC分類においてII型の吸脱着等温線を示す、請求項1に記載の構造体。
- 前記複数のナノ粒子の一次粒子径は7nm以下である、請求項1に記載の構造体。
- 前記複数のナノ粒子の一次粒子径は5nm以下である、請求項1に記載の構造体。
- 前記複数のナノ粒子のそれぞれの前記コア部は金属酸化物である、請求項1に記載の構造体。
- 前記複数のナノ粒子のそれぞれの前記コア部は、ジルコニウム、チタン、スズ、シリコン、アルミニウムまたは亜鉛の酸化物である、請求項1に記載の構造体。
- 前記複数のナノ粒子のそれぞれの前記コア部は、シリコンまたはアルミニウムの酸化物である、請求項1に記載の構造体。
- 前記表面修飾部は反応性官能基を含む、請求項1に記載の構造体。
- 前記反応性官能基を有する前記表面修飾部は、下記一般式(1)または(2)で表される有機シラン化合物からなる、請求項8に記載の構造体。
[化1]
R1 XSi(OR2)4-X・・・(1)
R1 XSiCl4-X・・・(2)
(R1は、水素原子、ビニル基、アクリロキシ基、メタアクリロキシ基、アミノプロピル基、グリシドキシプロピル基およびメルカプトプロピル基のいずれかである。R2は、メチル基、エチル基、プロピル基およびイソプロピル基のいずれかである。Xは3以下の整数である。) - 前記表面修飾部は反応性官能基を含まない、請求項1に記載の構造体。
- 前記反応性官能基を含まない前記表面修飾部は、下記一般式(3)または(4)で表される、反応性官能基を持たない有機金属化合物である、請求項10に記載の構造体。
[化2]
R3 XM(OR4)4-X・・・(3)
R3 XMCl4-X・・・(4)
(R3は、メチル基、エチル基、プロピル基、イソプロピル基、ブチル基、ペンチル基、ヘキシル基、ヘプチル基、オクチル基、デシル基、ドデシル基、ヘキサデシル基、ビニル基およびフェニル基のいずれかである。R4は、メチル基、エチル基、プロピル基およびイソプロピル基のいずれかである。Mは、Si,Al,Ti,SnおよびZnのいずれかである。Xは、3以下の整数である。)
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP23774634.2A EP4497725A4 (en) | 2022-03-23 | 2023-03-13 | STRUCTURE |
| US18/843,475 US20250196099A1 (en) | 2022-03-23 | 2023-03-13 | Structure |
| JP2024510026A JPWO2023182037A1 (ja) | 2022-03-23 | 2023-03-13 |
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| JP2022046569 | 2022-03-23 | ||
| JP2022-046569 | 2022-03-23 |
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| PCT/JP2023/009554 Ceased WO2023182037A1 (ja) | 2022-03-23 | 2023-03-13 | 構造体 |
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| US (1) | US20250196099A1 (ja) |
| EP (1) | EP4497725A4 (ja) |
| JP (1) | JPWO2023182037A1 (ja) |
| WO (1) | WO2023182037A1 (ja) |
Citations (5)
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| JP2004520456A (ja) * | 2000-11-29 | 2004-07-08 | ナノフェイズ テクノロジーズ コーポレイション | 表面処理されたナノ結晶粒子を含む、実質的に透明な耐摩耗性フィルム |
| JP2004303870A (ja) * | 2003-03-31 | 2004-10-28 | Toshiba Corp | 微細パターン形成方法 |
| WO2013094679A1 (ja) | 2011-12-21 | 2013-06-27 | 富士電機株式会社 | ナノコンポジット樹脂組成物 |
| US20140343233A1 (en) * | 2011-11-21 | 2014-11-20 | University Of South Carolina | Silicone Based Nanocomposites Including Inorganic Nanoparticles and Their Methods of Manufacture and Use |
| JP2022046569A (ja) | 2015-01-20 | 2022-03-23 | シトムクス セラピューティクス,インコーポレイティド | マトリックスメタロプロテアーゼ切断可能及びセリンプロテアーゼ切断可能な基質並びにそれらの使用方法 |
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| KR101108654B1 (ko) * | 2009-07-31 | 2012-01-31 | 서강대학교산학협력단 | 금속 산화물 코어/쉘 구형 구조체 및 그의 제조 방법 |
| JP5273744B2 (ja) * | 2010-07-16 | 2013-08-28 | 住友大阪セメント株式会社 | 無機酸化物粒子とシリコーン樹脂との複合組成物の製造方法 |
| JP6048392B2 (ja) * | 2013-12-20 | 2016-12-21 | コニカミノルタ株式会社 | 有機無機複合材料の製造方法および光学材料の製造方法 |
-
2023
- 2023-03-13 WO PCT/JP2023/009554 patent/WO2023182037A1/ja not_active Ceased
- 2023-03-13 EP EP23774634.2A patent/EP4497725A4/en not_active Withdrawn
- 2023-03-13 JP JP2024510026A patent/JPWO2023182037A1/ja active Pending
- 2023-03-13 US US18/843,475 patent/US20250196099A1/en active Pending
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Also Published As
| Publication number | Publication date |
|---|---|
| US20250196099A1 (en) | 2025-06-19 |
| EP4497725A4 (en) | 2025-10-22 |
| EP4497725A1 (en) | 2025-01-29 |
| JPWO2023182037A1 (ja) | 2023-09-28 |
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