CN112663162A - Antistatic bacteriostatic ultrahigh molecular weight polyethylene fiber and preparation method thereof - Google Patents
Antistatic bacteriostatic ultrahigh molecular weight polyethylene fiber and preparation method thereof Download PDFInfo
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- 238000002360 preparation method Methods 0.000 title claims description 22
- 239000000463 material Substances 0.000 claims abstract description 36
- 239000003242 anti bacterial agent Substances 0.000 claims abstract description 34
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- 235000019812 sodium carboxymethyl cellulose Nutrition 0.000 claims description 6
- 229920001027 sodium carboxymethylcellulose Polymers 0.000 claims description 6
- HVCOBJNICQPDBP-UHFFFAOYSA-N 3-[3-[3,5-dihydroxy-6-methyl-4-(3,4,5-trihydroxy-6-methyloxan-2-yl)oxyoxan-2-yl]oxydecanoyloxy]decanoic acid;hydrate Chemical compound O.OC1C(OC(CC(=O)OC(CCCCCCC)CC(O)=O)CCCCCCC)OC(C)C(O)C1OC1C(O)C(O)C(O)C(C)O1 HVCOBJNICQPDBP-UHFFFAOYSA-N 0.000 claims description 5
- KWIUHFFTVRNATP-UHFFFAOYSA-N Betaine Natural products C[N+](C)(C)CC([O-])=O KWIUHFFTVRNATP-UHFFFAOYSA-N 0.000 claims description 5
- 229930186217 Glycolipid Natural products 0.000 claims description 5
- KWIUHFFTVRNATP-UHFFFAOYSA-O N,N,N-trimethylglycinium Chemical compound C[N+](C)(C)CC(O)=O KWIUHFFTVRNATP-UHFFFAOYSA-O 0.000 claims description 5
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 5
- 239000006087 Silane Coupling Agent Substances 0.000 claims description 5
- DBMJMQXJHONAFJ-UHFFFAOYSA-M Sodium laurylsulphate Chemical compound [Na+].CCCCCCCCCCCCOS([O-])(=O)=O DBMJMQXJHONAFJ-UHFFFAOYSA-M 0.000 claims description 5
- 244000269722 Thea sinensis Species 0.000 claims description 5
- 229960003237 betaine Drugs 0.000 claims description 5
- IEJIGPNLZYLLBP-UHFFFAOYSA-N dimethyl carbonate Chemical compound COC(=O)OC IEJIGPNLZYLLBP-UHFFFAOYSA-N 0.000 claims description 5
- 229930182470 glycoside Natural products 0.000 claims description 5
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 5
- 239000001397 quillaja saponaria molina bark Substances 0.000 claims description 5
- 229930182490 saponin Natural products 0.000 claims description 5
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- 238000003756 stirring Methods 0.000 claims description 5
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- 244000281762 Chenopodium ambrosioides Species 0.000 claims description 3
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- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Natural products C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 claims description 3
- 229920001577 copolymer Polymers 0.000 claims description 3
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- 238000000605 extraction Methods 0.000 claims description 2
- 239000004584 polyacrylic acid Substances 0.000 claims description 2
- UUQHKWMIDYRWHH-UHFFFAOYSA-N Methyl beta-orcinolcarboxylate Chemical compound COC(=O)C1=C(C)C=C(O)C(C)=C1O UUQHKWMIDYRWHH-UHFFFAOYSA-N 0.000 claims 2
- 244000166124 Eucalyptus globulus Species 0.000 claims 1
- 230000000844 anti-bacterial effect Effects 0.000 abstract description 22
- 230000002035 prolonged effect Effects 0.000 abstract description 3
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- 230000000052 comparative effect Effects 0.000 description 11
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- 238000010298 pulverizing process Methods 0.000 description 6
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 239000004744 fabric Substances 0.000 description 5
- 238000005406 washing Methods 0.000 description 5
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- QPJVMBTYPHYUOC-UHFFFAOYSA-N Methyl benzoate Natural products COC(=O)C1=CC=CC=C1 QPJVMBTYPHYUOC-UHFFFAOYSA-N 0.000 description 4
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- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 4
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- 239000002245 particle Substances 0.000 description 4
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- 229920010741 Ultra High Molecular Weight Polyethylene (UHMWPE) Polymers 0.000 description 2
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- 239000011787 zinc oxide Substances 0.000 description 2
- DXZMANYCMVCPIM-UHFFFAOYSA-L zinc;diethylphosphinate Chemical compound [Zn+2].CCP([O-])(=O)CC.CCP([O-])(=O)CC DXZMANYCMVCPIM-UHFFFAOYSA-L 0.000 description 2
- BOSAWIQFTJIYIS-UHFFFAOYSA-N 1,1,1-trichloro-2,2,2-trifluoroethane Chemical compound FC(F)(F)C(Cl)(Cl)Cl BOSAWIQFTJIYIS-UHFFFAOYSA-N 0.000 description 1
- 239000004215 Carbon black (E152) Substances 0.000 description 1
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- CYTYCFOTNPOANT-UHFFFAOYSA-N Perchloroethylene Chemical group ClC(Cl)=C(Cl)Cl CYTYCFOTNPOANT-UHFFFAOYSA-N 0.000 description 1
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- Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
Abstract
The invention belongs to the technical field of ultra-high molecular weight polyethylene fibers, and particularly relates to an antistatic bacteriostatic ultra-high molecular weight polyethylene fiber which is composed of 100-200 parts by weight of ultra-high molecular weight polyethylene, 1-3 parts by weight of an antioxidant, 3-5 parts by weight of an antistatic agent, 20-50 parts by weight of an antibacterial agent, 1-10 parts by weight of a macromolecular compatilizer, 0.2-1.4 parts by weight of a coupling agent, 4-8 parts by weight of a surfactant, 0.1-1 part by weight of a synergist and 450-1000 parts by weight of a solvent. The invention selects a reasonable formula, and the components have synergistic effect, so that the overall performance of the UHMWPE fiber is effectively improved, particularly, the UHMWPE fiber has stronger antistatic and antibacterial properties, and simultaneously, the excellent mechanical properties and high stability of the material can be maintained, the service life of the UHMWPE fiber is prolonged, and the use cost is reduced.
Description
Technical Field
The invention belongs to the technical field of ultra-high molecular weight polyethylene fibers, and particularly relates to an antistatic bacteriostatic ultra-high molecular weight polyethylene fiber and a preparation method thereof.
Background
Ultra-high molecular weight polyethylene (UHMWPE) fibers have the characteristics of high strength, high modulus and high thermal conductivity, and are irreplaceable in many fields. The produced UHMWPE fiber with the antibacterial function has originality, can enrich the performance and the function of the UHMWPE fiber, and expand the application of the UHMWPE fiber in the fields of civil fabrics, medical devices and the like.
The UHMWPE fiber has low surface energy and surface tension, high crystallinity and extremely smooth surface, and is difficult to be effectively combined with common inorganic and organic antibacterial agents, so that the UHMWPE fiber and fabric treated by post-treatment modes of padding, coating the antibacterial agent and the like have poor bacteriostatic effect and short time effect. If the antibacterial agent is directly added in the production process, as the UHMWPE fiber production needs to be carried out through the processes of high-temperature dissolution, spinning (wet spinning is more than 220 ℃, dry spinning is more than 142 ℃), high-temperature hot drafting (drafting temperature is 120-155 ℃) and the like, a plurality of antibacterial agents are easy to generate chemical reaction at high temperature to cause failure; the UHMWPE fiber production needs to be subjected to hydrolysis and various solvent extraction washing (common extracting agents comprise dimethylbenzene, hydrocarbon cleaning agents, dichloromethane, tetrachloroethylene, trichlorotrifluoroethane and the like), so that a large amount of small-molecular antibacterial agents are lost in the production process, the content of the antibacterial agents is reduced, and the antibacterial effect is poor. In addition, the UHMWPE fiber has low surface energy and surface tension and high crystallinity, and even if the micromolecule antibacterial agent is added into the UHMWPE precursor before spinning by an adding mode, the micromolecule antibacterial agent in subsequent production can migrate to the surface of the fiber and be rapidly lost.
The prior art generally uses a method of adding an antistatic agent with relatively small molecular weight to improve the antistatic performance of a high molecular material. However, the low molecular antistatic agent used in this method gradually precipitates from the surface of the article with the passage of time, so that the antistatic property of the material gradually decreases until the antistatic property is lost, and the instability of the antistatic property of the article in a practical process is a potential safety hazard in production.
CN106589582A discloses a reinforced and toughened antibacterial polypropylene material and a production method thereof, wherein nano zinc oxide or titanium dioxide is adopted as an inorganic antibacterial agent, then polypropylene, ultra-high molecular weight polyethylene master batch, the inorganic antibacterial agent, grafted polypropylene and other auxiliary agents are melted, blended and extruded by a double-screw extruder to obtain the reinforced and toughened antibacterial polypropylene material, and the method is applied to the production methodWhen ultrahigh molecular weight polyethylene (UHMWPE) fiber is subjected to vitamin production, the antibacterial rate is greatly reduced, negative effects are generated on the breaking strength and the initial modulus, and in addition, TiO2The antibacterial effect is achieved only under the condition of being excited by ultraviolet light, and the antibacterial ability is not achieved under other conditions. Firstly, the antibacterial rate of the obtained material is not ideal, the application of the material in the field of medicine is limited, and the antibacterial rate of the material is further reduced because the inorganic antibacterial agent has small molecules and high migration speed of inorganic particles and is easy to lose from the material; secondly, the mechanical properties and antistatic effect of the product are not described, and the practicability of the product as a material is difficult to comment.
Disclosure of Invention
The invention aims to solve the technical problems and provide the antistatic bacteriostatic ultrahigh molecular weight polyethylene fiber.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
an antistatic bacteriostatic ultrahigh molecular weight polyethylene fiber comprises 100-200 parts by weight of ultrahigh molecular weight polyethylene, 1-3 parts by weight of antioxidant, 3-5 parts by weight of antistatic agent, 20-50 parts by weight of antibacterial agent, 1-10 parts by weight of macromolecular compatilizer, 0.2-1.4 parts by weight of coupling agent, 4-8 parts by weight of surfactant, 0.1-1 part by weight of synergist and 450-1000 parts by weight of solvent;
wherein the macromolecular compatilizer is selected from one of polyethylene grafted maleic anhydride PE-g-MAH, polyethylene grafted maleic anhydride/styrene copolymer, halogenated polyethylene and polyethylene grafted polyacrylic acid.
Preferably, the viscosity average molecular weight of the ultra-high molecular weight polyethylene is 450 to 850 ten thousand.
Preferably, the antioxidant comprises AT168 antioxidant and 412S antioxidant according to the weight ratio of 1-5: 1-2.
Preferably, the antistatic agent consists of conductive carbon black and single-walled carbon nanotubes in a weight ratio of 2-3: 1-2.
Preferably, the coupling agent is selected from one of silane coupling agents KH560, KH570 or DL 602.
Preferably, the surfactant is composed of sodium dodecyl sulfate, laurylamidopropyl betaine and fiber glycolipid according to the weight ratio of 1-2: 3-4.
Preferably, the synergist comprises tea saponin, chitosan, alkyl glycoside, polyvinyl alcohol and sodium carboxymethyl cellulose according to the weight ratio of 2-3: 1-2: 3-5.
Preferably, the solvent consists of ethanol and dimethyl carbonate according to the weight ratio of 4-5: 1-2.
Preferably, the antibacterial agent consists of chenopodium ambrosioides extract, eucalyptus robusta leaf extract, 2, 4-dihydroxy-3, 6-dimethyl methyl benzoate and sulfur powder according to the weight ratio of 3-5: 2-3: 1-2;
the preparation method of the chenopodium ambrosioides extract comprises the following steps:
crushing chenopodium ambrosioides, extracting with microwave water for 30-40 min at 50-75 ℃ and microwave power of 800W twice, combining extract, filtering, vacuum filtering, and concentrating under reduced pressure to obtain the product with relative density of 1.05-1.1 g/cm3The chenopodium ambrosioides extract of (1);
the preparation method of the eucalyptus grandiflorum leaf extract comprises the following steps:
crushing the eucalyptus robusta leaves, soaking for 6-12 hours by taking 72-84% ethanol as a solvent according to the weight ratio of the material liquid to the solvent being 1: 8-10, performing reflux extraction twice at 75-85 ℃ for 2-4 hours each time, and collecting the reflux extract to obtain the eucalyptus robusta leaf extract.
Based on a general inventive concept, another object of the present invention is to provide a method for preparing the above-mentioned antistatic bacteriostatic ultrahigh molecular weight polyethylene fiber, comprising the following steps:
s1, dispersing and mixing an antioxidant, an antistatic agent, a macromolecular compatilizer, a coupling agent, a surfactant and a 3/4 solvent for 25-45 min at a rotating speed of 300-800 r/min to prepare a mixed solution;
s2, fully stirring the antibacterial agent, the synergist and the 1/4 solvent, uniformly mixing, and carrying out mixed impregnation for 36-48 h to prepare a mixture;
s3, mixing the mixed solution obtained in the step S1, the mixture obtained in the step S2 and UHMWPE powder to prepare a mixed material;
and S4, feeding the mixed material obtained in the step S3 into a double-screw extruder, extruding and spinning, cooling, solidifying, extracting, drying and stretching in an over-doubling manner to obtain the antistatic bacteriostatic ultrahigh molecular weight polyethylene fiber.
Compared with the prior art, the chenopodium ambrosioides and the eucalyptus robusta leaves both contain effective antibacterial components and are natural antibacterial agents with excellent performance, chenopodium ambrosioides extract and the eucalyptus robusta leaf extract which are prepared by a specific process are carried with a synergist mixture which is prepared by a specific formula, so that a better antibacterial effect is synergistically endowed to UHMWPE fibers, and the weakening of the mechanical property of the UHMWPE fiber material caused by the antibacterial agent is greatly reduced, such as the breaking strength and the initial modulus; the conductive carbon black is an excellent conductive material, and the surface resistance and the volume resistance of the material can be greatly reduced by the aid of the single-walled carbon nanotubes, so that the material has antistatic, halogen-free flame retardant and high wear resistance, and meanwhile, the excellent mechanical property of the material can be maintained; by introducing the macromolecular compatilizer, the processing rheological property of the ultrahigh molecular weight polyethylene is improved, the compatibility between the ultrahigh molecular weight polyethylene and other components is improved, the interaction between the particles and an UHMWPE fiber matrix is effectively increased, the migration speed of the particles is reduced, the capability of keeping the antibacterial effect of the antibacterial UHMWPE fibers and fabrics after washing after water washing is enhanced, a multi-phase system with micro-distribution is favorably formed in the processing process, the surface charge transfer condition of the materials is obviously improved, and the excellent antistatic effect is ensured to be obtained under the condition of low consumption of conductive components.
The invention selects a reasonable formula, and the components have synergistic effect, so that the overall performance of the UHMWPE fiber is effectively improved, particularly, the UHMWPE fiber has stronger antistatic and antibacterial properties, and simultaneously, the excellent mechanical properties and high stability of the material can be maintained, the service life of the UHMWPE fiber is prolonged, and the use cost is reduced.
Detailed Description
The present invention will be further described with reference to specific embodiments for making the objects, technical solutions and advantages of the present invention more apparent, but the present invention is not limited to these examples. It should be noted that, without conflict, any combination between the embodiments or technical features described below may form a new embodiment. In the present invention, all parts and percentages are by weight, unless otherwise specified, and the equipment and materials used are commercially available or commonly used in the art. The methods in the following examples are conventional in the art unless otherwise specified.
Example 1
An antistatic bacteriostatic ultrahigh molecular weight polyethylene fiber consists of 150 parts by weight of UHMWPE powder, 2 parts by weight of antioxidant, 4 parts by weight of antistatic agent, 35 parts by weight of antibacterial agent, 6 parts by weight of macromolecular compatilizer, 0.8 part by weight of coupling agent, 6 parts by weight of surfactant, 0.5 part by weight of synergist and 750 parts by weight of solvent;
the macromolecular compatilizer is polyethylene grafted maleic anhydride PE-g-MAH, and the viscosity average molecular weight of UHMWPE powder is 650 ten thousand.
The antioxidant consists of AT168 antioxidant and 412S antioxidant in the weight ratio of 3 to 1.5; the antistatic agent consists of conductive carbon black and single-walled carbon nanotubes in a weight ratio of 2.5: 1.5; the coupling agent is a silane coupling agent KH 560; the surfactant is composed of sodium dodecyl sulfate, laurylamidopropyl betaine and fiber glycolipid according to the weight ratio of 1.5: 3.5; the synergist consists of tea saponin, chitosan, alkyl glycoside, polyvinyl alcohol and sodium carboxymethyl cellulose according to the weight ratio of 2.5: 1.5: 4; the solvent consists of ethanol and dimethyl carbonate according to the weight ratio of 4.5: 1.5.
The antibacterial agent consists of chenopodium ambrosioides extract, eucalyptus robusta leaf extract, 2, 4-dihydroxy-3, 6-dimethyl methyl benzoate and sulfur powder according to the weight ratio of 4: 2.5: 1.5;
the preparation method of the chenopodium ambrosioides extract comprises the following steps:
pulverizing herba Chenopodii, extracting with microwave water for 35min at 62 deg.C under 800W for two times, mixing extractive solutions, filtering, vacuum filtering, and concentrating under reduced pressure to obtain extract with relative density of 1.06g/cm3The chenopodium ambrosioides extract of (1);
the preparation method of the eucalyptus grandiflorum leaf extract comprises the following steps:
pulverizing folium Eucalypti Robustae, soaking in 78% ethanol at a material-liquid weight ratio of 1: 9 for 9 hr, reflux-extracting at 80 deg.C for 3 hr twice, and collecting reflux extractive solution to obtain folium Eucalypti Robustae extract.
The preparation method of the antistatic bacteriostatic ultrahigh molecular weight polyethylene fiber comprises the following steps:
s1, dispersing and mixing an antioxidant, an antistatic agent, a macromolecular compatilizer, a coupling agent, a surfactant and a solvent 3/4 for 35min at a rotating speed of 650r/min to prepare a mixed solution;
s2, fully stirring the antibacterial agent, the synergist and the 1/4 solvent, uniformly mixing, and mixing and soaking for 42 hours to prepare a mixture;
s3, mixing the mixed solution obtained in the step S1, the mixture obtained in the step S2 and UHMWPE powder to prepare a mixed material;
and S4, feeding the mixed material obtained in the step S3 into a double-screw extruder, extruding and spinning, cooling, solidifying, extracting, drying and stretching in an over-doubling manner to obtain the antistatic bacteriostatic ultrahigh molecular weight polyethylene fiber.
Example 2
An antistatic bacteriostatic ultrahigh molecular weight polyethylene fiber consists of 200 parts by weight of UHMWPE powder, 1 part by weight of antioxidant, 5 parts by weight of antistatic agent, 20 parts by weight of antibacterial agent, 10 parts by weight of macromolecular compatilizer, 0.2 part by weight of coupling agent, 8 parts by weight of surfactant, 0.1 part by weight of synergist and 1000 parts by weight of solvent;
the macromolecular compatilizer is polyethylene grafted maleic anhydride/styrene copolymer, and the viscosity average molecular weight of UHMWPE powder is 850 ten thousand.
The antioxidant consists of AT168 antioxidant and 412S antioxidant in the weight ratio of 5 to 1; the antistatic agent consists of conductive carbon black and single-walled carbon nanotubes in a weight ratio of 3: 1; the coupling agent is a silane coupling agent KH 570; the surfactant is composed of sodium dodecyl sulfate, laurylamidopropyl betaine and fiber glycolipid according to the weight ratio of 2: 1: 4; the synergist is prepared from tea saponin, chitosan, alkyl glycoside, polyvinyl alcohol and sodium carboxymethylcellulose according to the weight ratio of 3: 1: 2: 1: 5; the solvent consists of ethanol and dimethyl carbonate according to the weight ratio of 5: 1.
The antibacterial agent consists of chenopodium ambrosioides extract, eucalyptus robusta leaf extract, 2, 4-dihydroxy-3, 6-dimethyl methyl benzoate and sulfur powder according to the weight ratio of 5: 2: 1;
the preparation method of the chenopodium ambrosioides extract comprises the following steps:
pulverizing herba Chenopodii, extracting with microwave water for 40min at 50 deg.C under 800W for two times, mixing extractive solutions, filtering, vacuum filtering, and concentrating under reduced pressure to obtain extract with relative density of 1.1g/cm3The chenopodium ambrosioides extract of (1);
the preparation method of the eucalyptus grandiflorum leaf extract comprises the following steps:
pulverizing folium Eucalypti Robustae, soaking in 84% ethanol at a weight ratio of 1: 8 for 12 hr, reflux-extracting at 75 deg.C for 4 hr twice, and collecting the reflux extractive solution to obtain folium Eucalypti Robustae extract.
The preparation method of the antistatic bacteriostatic ultrahigh molecular weight polyethylene fiber comprises the following steps:
s1, dispersing and mixing an antioxidant, an antistatic agent, a macromolecular compatilizer, a coupling agent, a surfactant and a solvent 3/4 for 25min at the rotating speed of 800r/min to prepare a mixed solution;
s2, fully stirring the antibacterial agent, the synergist and the 1/4 solvent, uniformly mixing, and carrying out mixed impregnation for 48 hours to prepare a mixture;
s3, mixing the mixed solution obtained in the step S1, the mixture obtained in the step S2 and UHMWPE powder to prepare a mixed material;
and S4, feeding the mixed material obtained in the step S3 into a double-screw extruder, extruding and spinning, cooling, solidifying, extracting, drying and stretching in an over-doubling manner to obtain the antistatic bacteriostatic ultrahigh molecular weight polyethylene fiber.
Example 3
An antistatic bacteriostatic ultrahigh molecular weight polyethylene fiber consists of 100 parts by weight of UHMWPE powder, 3 parts by weight of antioxidant, 3 parts by weight of antistatic agent, 50 parts by weight of antibacterial agent, 1 part by weight of macromolecular compatilizer, 1.4 parts by weight of coupling agent, 4 parts by weight of surfactant, 1 part by weight of synergist and 450 parts by weight of solvent;
the macromolecular compatilizer is polyethylene grafted maleic anhydride PE-g-MAH, and the viscosity average molecular weight of UHMWPE powder is 450 ten thousand.
The antioxidant consists of AT168 antioxidant and 412S antioxidant in the weight ratio of 1 to 2; the antistatic agent consists of conductive carbon black and single-walled carbon nanotubes in a weight ratio of 2: 2; the coupling agent is selected from a silane coupling agent DL 602; the surfactant is composed of sodium dodecyl sulfate, laurylamidopropyl betaine and fiber glycolipid according to the weight ratio of 1: 2: 3; the synergist is prepared from tea saponin, chitosan, alkyl glycoside, polyvinyl alcohol and sodium carboxymethylcellulose according to the weight ratio of 2: 1: 2: 3; the solvent consists of ethanol and dimethyl carbonate according to the weight ratio of 4: 2.
The antibacterial agent consists of chenopodium ambrosioides extract, eucalyptus robusta leaf extract, 2, 4-dihydroxy-3, 6-dimethyl methyl benzoate and sulfur powder according to the weight ratio of 3: 1: 2;
the preparation method of the chenopodium ambrosioides extract comprises the following steps:
pulverizing herba Chenopodii, extracting with microwave water for 30min at 75 deg.C under 800W for two times, mixing extractive solutions, filtering, vacuum filtering, and concentrating under reduced pressure to obtain extract with relative density of 1.05g/cm3The chenopodium ambrosioides extract of (1);
the preparation method of the eucalyptus grandiflorum leaf extract comprises the following steps:
pulverizing folium Eucalypti Robustae, soaking in 72% ethanol at a material-liquid weight ratio of 1: 8 for 6 hr, reflux-extracting at 85 deg.C for 2 hr twice, and collecting the reflux extractive solution to obtain folium Eucalypti Robustae extract.
The preparation method of the antistatic bacteriostatic ultrahigh molecular weight polyethylene fiber comprises the following steps:
s1, dispersing and mixing an antioxidant, an antistatic agent, a macromolecular compatilizer, a coupling agent, a surfactant and a solvent 3/4 for 25min at a rotating speed of 300-800 r/min to prepare a mixed solution;
s2, fully stirring the antibacterial agent, the synergist and the 1/4 solvent, uniformly mixing, and carrying out mixed impregnation for 48 hours to prepare a mixture;
s3, mixing the mixed solution obtained in the step S1, the mixture obtained in the step S2 and UHMWPE powder to prepare a mixed material;
and S4, feeding the mixed material obtained in the step S3 into a double-screw extruder, extruding and spinning, cooling, solidifying, extracting, drying and stretching in an over-doubling manner to obtain the antistatic bacteriostatic ultrahigh molecular weight polyethylene fiber.
Comparative example 1
Using anatase type nano TiO2Nano ZnO, AgNO3And nano Ag in a weight ratio of 2.5: 3 were used in place of the antibacterial agent in example 1, and the other components and preparation method were the same as in example 1.
Comparative example 2
The antibacterial agent in example 1 was replaced by a mixture of chenopodium ambrosioides extract, eucalyptus robusta leaf extract and sulphur powder in a weight ratio of 4: 2, and the other ingredients and preparation method were the same as in example 1.
Comparative example 3
The mixture of the extract of the eucalyptus robusta leaves and the sulfur powder according to the weight ratio of 5: 3 is used for replacing the antibacterial agent in the example 1, and other components and the preparation method are the same as the example 1.
Comparative example 4
The antistatic agent in example 1 was replaced with single-component conductive carbon black, and the other components and preparation method were the same as in example 1.
Comparative example 5
The synergist in example 1 was replaced by a mixture of chitosan and sodium carboxymethylcellulose at a weight ratio of 2: 5, and the other ingredients and preparation method were the same as in example 1.
Comparative example 6
All ingredients and proportions were the same as in example 1, and the preparation was as follows:
s1, dispersing and mixing an antioxidant, an antistatic agent, a macromolecular compatilizer, a coupling agent, a surfactant, an antibacterial agent, a synergist and a solvent for 45min at a rotating speed of 650r/min to prepare a mixed solution;
s2, mixing the mixed liquor obtained in the step S1 with UHMWPE powder to prepare a mixed material;
and S3, feeding the mixed material obtained in the step S2 into a double-screw extruder, extruding and spinning, cooling, solidifying, extracting, drying and stretching in an over-doubling manner to obtain the antistatic bacteriostatic ultrahigh molecular weight polyethylene fiber.
Test example 1
The results of performance tests on the fibers prepared in examples 1 to 3 and comparative examples 1 to 6 are shown in the following table 1, wherein the antibacterial effect test method comprises the following steps: AATCC 100-: evaluation method of Antibacterial textiles (Antibacterial fabrics on Textile Materials: Association of Fulltext Information)
The calculation formula of the antibacterial rate is as follows:
R(％)＝(A-B)/A×100％；
r: the antibacterial rate;
a: average recovery bacteria number of UHMWPE fibers;
b: adding bacteriostatic agent UHMWPE fiber to average recovery bacteria number.
TABLE 1 results of various performance tests on fibers prepared in examples 1 to 3 and comparative examples 1 to 6
As can be seen from the above table 1, the examples 1 to 3 and the comparative examples 1 to 3 show that the chenopodium ambrosioides extract and the eucalyptus robusta leaf extract prepared by a specific process are carried with the synergist mixture prepared by a specific formula, so that the better bacteriostasis effect is synergistically provided for UHMWPE fibers, and the weakening of the mechanical property of the UHMWPE fiber material by the antibacterial agent is greatly reduced; the conductive carbon black is an excellent conductive material, and the examples 1-3 and the comparative example 4 show that the surface resistance and the volume resistance of the material can be greatly reduced by assisting the single-walled carbon nanotube, so that the material has the performances of antistatic, halogen-free flame retardation and high wear resistance, and the excellent mechanical properties of the material can be maintained; by introducing the macromolecular compatilizer, the processing rheological property of the ultrahigh molecular weight polyethylene is improved, the compatibility between the ultrahigh molecular weight polyethylene and other components is improved, the interaction between the particles and an UHMWPE fiber matrix is effectively increased, the migration speed of the particles is reduced, the capability of keeping the antibacterial effect of the antibacterial UHMWPE fibers and fabrics after washing after water washing is enhanced, a multi-phase system with micro-distribution is favorably formed in the processing process, the surface charge transfer condition of the material is obviously improved, and the excellent antistatic effect is ensured to be obtained under the condition of low consumption of conductive components; through the examples 1-3 and the comparative examples 5-6, the reasonable formula and the specific process are selected, and all the components have synergistic effect, so that the overall performance of the UHMWPE fiber is effectively improved, particularly, the UHMWPE fiber has stronger antistatic and bacteriostatic properties, and meanwhile, the excellent mechanical properties and high stability of the material can be maintained, the service life of the UHMWPE fiber is prolonged, and the use cost is reduced.
The above embodiments are merely preferred embodiments of the present invention, and any simple modification, modification and substitution changes made to the above embodiments according to the technical spirit of the present invention are within the scope of the technical solution of the present invention.
Claims (10)
1. An antistatic bacteriostatic ultrahigh molecular weight polyethylene fiber is characterized by comprising 100-200 parts by weight of ultrahigh molecular weight polyethylene, 1-3 parts by weight of antioxidant, 3-5 parts by weight of antistatic agent, 20-50 parts by weight of antibacterial agent, 1-10 parts by weight of macromolecular compatilizer, 0.2-1.4 parts by weight of coupling agent, 4-8 parts by weight of surfactant, 0.1-1 part by weight of synergist and 450-1000 parts by weight of solvent;
wherein the macromolecular compatilizer is selected from one of polyethylene grafted maleic anhydride PE-g-MAH, polyethylene grafted maleic anhydride/styrene copolymer, halogenated polyethylene and polyethylene grafted polyacrylic acid.
2. The antistatic bacteriostatic ultrahigh molecular weight polyethylene fiber according to claim 1, wherein the viscosity average molecular weight of the ultrahigh molecular weight polyethylene is 450 to 850 ten thousand.
3. The antistatic bacteriostatic ultrahigh molecular weight polyethylene fiber as claimed in claim 1, wherein the antioxidant comprises AT168 antioxidant and 412S antioxidant in a weight ratio of 1-5: 1-2.
4. The antistatic bacteriostatic ultrahigh molecular weight polyethylene fiber according to claim 1, wherein the antistatic agent consists of conductive carbon black and single-walled carbon nanotubes in a weight ratio of 2-3: 1-2.
5. The antistatic bacteriostatic ultrahigh molecular weight polyethylene fiber as claimed in claim 1, wherein the coupling agent is selected from one of silane coupling agents KH560, KH570 or DL 602.
6. The antistatic bacteriostatic ultrahigh molecular weight polyethylene fiber as claimed in claim 1, wherein the surfactant comprises sodium dodecyl sulfate, laurylamidopropyl betaine and fiber glycolipid in a weight ratio of 1-2: 3-4.
7. The antistatic bacteriostatic ultrahigh molecular weight polyethylene fiber of claim 1, wherein the synergist comprises tea saponin, chitosan, alkyl glycoside, polyvinyl alcohol and sodium carboxymethylcellulose in a weight ratio of 2-3: 1-2: 3-5.
8. The ultra-high molecular weight polyethylene fiber with antistatic and bacteriostatic effects as claimed in claim 1, wherein the solvent comprises ethanol and dimethyl carbonate in a weight ratio of 4-5: 1-2.
9. The antistatic bacteriostatic ultrahigh molecular weight polyethylene fiber according to any one of claims 1 to 8, wherein the antibacterial agent consists of chenopodium ambrosioides extract, eucalyptus robusta leaf extract, methyl 2, 4-dihydroxy-3, 6-dimethylbenzoate and sulfur powder in a weight ratio of 3-5: 2-3: 1-2;
the preparation method of the chenopodium ambrosioides extract comprises the following steps:
crushing chenopodium ambrosioides, extracting with microwave water for 30-40 min at 50-75 ℃ and microwave power of 800W twice, combining extract, filtering, vacuum filtering, and concentrating under reduced pressure to obtain the product with relative density of 1.05-1.1 g/cm3The chenopodium ambrosioides extract of (1);
the preparation method of the eucalyptus grandiflorum leaf extract comprises the following steps:
crushing the eucalyptus robusta leaves, soaking for 6-12 hours by taking 72-84% ethanol as a solvent according to the weight ratio of the material liquid to the solvent being 1: 8-10, performing reflux extraction twice at 75-85 ℃ for 2-4 hours each time, and collecting the reflux extract to obtain the eucalyptus robusta leaf extract.
10. The method for preparing the antistatic bacteriostatic ultrahigh molecular weight polyethylene fiber of claim 9, which is characterized by comprising the following steps:
s1, dispersing and mixing an antioxidant, an antistatic agent, a macromolecular compatilizer, a coupling agent, a surfactant and a 3/4 solvent for 25-45 min at a rotating speed of 300-800 r/min to prepare a mixed solution;
s2, fully stirring the antibacterial agent, the synergist and the 1/4 solvent, uniformly mixing, and carrying out mixed impregnation for 36-48 h to prepare a mixture;
s3, mixing the mixed solution obtained in the step S1, the mixture obtained in the step S2 and UHMWPE powder to prepare a mixed material;
and S4, feeding the mixed material obtained in the step S3 into a double-screw extruder, extruding and spinning, cooling, solidifying, extracting, drying and stretching in an over-doubling manner to obtain the antistatic bacteriostatic ultrahigh molecular weight polyethylene fiber.
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| EP4137105A1 (en) * | 2021-08-18 | 2023-02-22 | Xun, Wei | Rubber strip compression garment fabric and preparation method thereof |
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Application publication date: 20210416 |