CN113417144B - Polythiophene composite nylon conductive fiber and preparation method thereof - Google Patents
Polythiophene composite nylon conductive fiber and preparation method thereof Download PDFInfo
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- CN113417144B CN113417144B CN202110603925.5A CN202110603925A CN113417144B CN 113417144 B CN113417144 B CN 113417144B CN 202110603925 A CN202110603925 A CN 202110603925A CN 113417144 B CN113417144 B CN 113417144B
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- 239000000835 fiber Substances 0.000 title claims abstract description 135
- 229920001778 nylon Polymers 0.000 title claims abstract description 92
- 229920000123 polythiophene Polymers 0.000 title claims abstract description 37
- 239000004677 Nylon Substances 0.000 title claims abstract description 31
- 239000002131 composite material Substances 0.000 title claims abstract description 25
- 238000002360 preparation method Methods 0.000 title abstract description 15
- 235000013824 polyphenols Nutrition 0.000 claims abstract description 43
- 150000008442 polyphenolic compounds Chemical class 0.000 claims abstract description 34
- 238000000034 method Methods 0.000 claims abstract description 33
- 238000006243 chemical reaction Methods 0.000 claims abstract description 23
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 23
- 238000002791 soaking Methods 0.000 claims abstract description 19
- 239000007800 oxidant agent Substances 0.000 claims abstract description 15
- -1 polyphenol compound Chemical class 0.000 claims abstract description 15
- 230000001590 oxidative effect Effects 0.000 claims abstract description 14
- 150000003839 salts Chemical class 0.000 claims abstract description 11
- 239000002270 dispersing agent Substances 0.000 claims abstract description 10
- 150000003577 thiophenes Chemical class 0.000 claims abstract description 7
- 229920006118 nylon 56 Polymers 0.000 claims description 31
- 238000004140 cleaning Methods 0.000 claims description 26
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 24
- 239000000243 solution Substances 0.000 claims description 23
- 229920001467 poly(styrenesulfonates) Polymers 0.000 claims description 16
- 229940006186 sodium polystyrene sulfonate Drugs 0.000 claims description 16
- 239000007864 aqueous solution Substances 0.000 claims description 14
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 claims description 12
- RRAFCDWBNXTKKO-UHFFFAOYSA-N eugenol Chemical compound COC1=CC(CC=C)=CC=C1O RRAFCDWBNXTKKO-UHFFFAOYSA-N 0.000 claims description 10
- GKWLILHTTGWKLQ-UHFFFAOYSA-N 2,3-dihydrothieno[3,4-b][1,4]dioxine Chemical compound O1CCOC2=CSC=C21 GKWLILHTTGWKLQ-UHFFFAOYSA-N 0.000 claims description 9
- 238000001035 drying Methods 0.000 claims description 9
- 229920002292 Nylon 6 Polymers 0.000 claims description 8
- 229920002302 Nylon 6,6 Polymers 0.000 claims description 8
- 229960001922 sodium perborate Drugs 0.000 claims description 7
- YKLJGMBLPUQQOI-UHFFFAOYSA-M sodium;oxidooxy(oxo)borane Chemical compound [Na+].[O-]OB=O YKLJGMBLPUQQOI-UHFFFAOYSA-M 0.000 claims description 7
- TUSDEZXZIZRFGC-UHFFFAOYSA-N 1-O-galloyl-3,6-(R)-HHDP-beta-D-glucose Natural products OC1C(O2)COC(=O)C3=CC(O)=C(O)C(O)=C3C3=C(O)C(O)=C(O)C=C3C(=O)OC1C(O)C2OC(=O)C1=CC(O)=C(O)C(O)=C1 TUSDEZXZIZRFGC-UHFFFAOYSA-N 0.000 claims description 6
- 239000001263 FEMA 3042 Substances 0.000 claims description 6
- LRBQNJMCXXYXIU-PPKXGCFTSA-N Penta-digallate-beta-D-glucose Natural products OC1=C(O)C(O)=CC(C(=O)OC=2C(=C(O)C=C(C=2)C(=O)OC[C@@H]2[C@H]([C@H](OC(=O)C=3C=C(OC(=O)C=4C=C(O)C(O)=C(O)C=4)C(O)=C(O)C=3)[C@@H](OC(=O)C=3C=C(OC(=O)C=4C=C(O)C(O)=C(O)C=4)C(O)=C(O)C=3)[C@H](OC(=O)C=3C=C(OC(=O)C=4C=C(O)C(O)=C(O)C=4)C(O)=C(O)C=3)O2)OC(=O)C=2C=C(OC(=O)C=3C=C(O)C(O)=C(O)C=3)C(O)=C(O)C=2)O)=C1 LRBQNJMCXXYXIU-PPKXGCFTSA-N 0.000 claims description 6
- LRBQNJMCXXYXIU-NRMVVENXSA-N tannic acid Chemical compound OC1=C(O)C(O)=CC(C(=O)OC=2C(=C(O)C=C(C=2)C(=O)OC[C@@H]2[C@H]([C@H](OC(=O)C=3C=C(OC(=O)C=4C=C(O)C(O)=C(O)C=4)C(O)=C(O)C=3)[C@@H](OC(=O)C=3C=C(OC(=O)C=4C=C(O)C(O)=C(O)C=4)C(O)=C(O)C=3)[C@@H](OC(=O)C=3C=C(OC(=O)C=4C=C(O)C(O)=C(O)C=4)C(O)=C(O)C=3)O2)OC(=O)C=2C=C(OC(=O)C=3C=C(O)C(O)=C(O)C=3)C(O)=C(O)C=2)O)=C1 LRBQNJMCXXYXIU-NRMVVENXSA-N 0.000 claims description 6
- 229940033123 tannic acid Drugs 0.000 claims description 6
- 235000015523 tannic acid Nutrition 0.000 claims description 6
- 229920002258 tannic acid Polymers 0.000 claims description 6
- NPBVQXIMTZKSBA-UHFFFAOYSA-N Chavibetol Natural products COC1=CC=C(CC=C)C=C1O NPBVQXIMTZKSBA-UHFFFAOYSA-N 0.000 claims description 5
- 239000005770 Eugenol Substances 0.000 claims description 5
- UVMRYBDEERADNV-UHFFFAOYSA-N Pseudoeugenol Natural products COC1=CC(C(C)=C)=CC=C1O UVMRYBDEERADNV-UHFFFAOYSA-N 0.000 claims description 5
- 229960002217 eugenol Drugs 0.000 claims description 5
- LCPVQAHEFVXVKT-UHFFFAOYSA-N 2-(2,4-difluorophenoxy)pyridin-3-amine Chemical compound NC1=CC=CN=C1OC1=CC=C(F)C=C1F LCPVQAHEFVXVKT-UHFFFAOYSA-N 0.000 claims description 4
- CWVRJTMFETXNAD-FWCWNIRPSA-N 3-O-Caffeoylquinic acid Natural products O[C@H]1[C@@H](O)C[C@@](O)(C(O)=O)C[C@H]1OC(=O)\C=C\C1=CC=C(O)C(O)=C1 CWVRJTMFETXNAD-FWCWNIRPSA-N 0.000 claims description 4
- PZIRUHCJZBGLDY-UHFFFAOYSA-N Caffeoylquinic acid Natural products CC(CCC(=O)C(C)C1C(=O)CC2C3CC(O)C4CC(O)CCC4(C)C3CCC12C)C(=O)O PZIRUHCJZBGLDY-UHFFFAOYSA-N 0.000 claims description 4
- CWVRJTMFETXNAD-KLZCAUPSSA-N Neochlorogenin-saeure Natural products O[C@H]1C[C@@](O)(C[C@@H](OC(=O)C=Cc2ccc(O)c(O)c2)[C@@H]1O)C(=O)O CWVRJTMFETXNAD-KLZCAUPSSA-N 0.000 claims description 4
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 claims description 4
- CWVRJTMFETXNAD-JUHZACGLSA-N chlorogenic acid Chemical compound O[C@@H]1[C@H](O)C[C@@](O)(C(O)=O)C[C@H]1OC(=O)\C=C\C1=CC=C(O)C(O)=C1 CWVRJTMFETXNAD-JUHZACGLSA-N 0.000 claims description 4
- 235000001368 chlorogenic acid Nutrition 0.000 claims description 4
- 229940074393 chlorogenic acid Drugs 0.000 claims description 4
- FFQSDFBBSXGVKF-KHSQJDLVSA-N chlorogenic acid Natural products O[C@@H]1C[C@](O)(C[C@@H](CC(=O)C=Cc2ccc(O)c(O)c2)[C@@H]1O)C(=O)O FFQSDFBBSXGVKF-KHSQJDLVSA-N 0.000 claims description 4
- BMRSEYFENKXDIS-KLZCAUPSSA-N cis-3-O-p-coumaroylquinic acid Natural products O[C@H]1C[C@@](O)(C[C@@H](OC(=O)C=Cc2ccc(O)cc2)[C@@H]1O)C(=O)O BMRSEYFENKXDIS-KLZCAUPSSA-N 0.000 claims description 4
- 229910052700 potassium Inorganic materials 0.000 claims description 4
- 239000011591 potassium Substances 0.000 claims description 4
- CHQMHPLRPQMAMX-UHFFFAOYSA-L sodium persulfate Substances [Na+].[Na+].[O-]S(=O)(=O)OOS([O-])(=O)=O CHQMHPLRPQMAMX-UHFFFAOYSA-L 0.000 claims description 4
- KSEBMYQBYZTDHS-HWKANZROSA-M (E)-Ferulic acid Natural products COC1=CC(\C=C\C([O-])=O)=CC=C1O KSEBMYQBYZTDHS-HWKANZROSA-M 0.000 claims description 3
- 235000001785 ferulic acid Nutrition 0.000 claims description 3
- KSEBMYQBYZTDHS-HWKANZROSA-N ferulic acid Chemical compound COC1=CC(\C=C\C(O)=O)=CC=C1O KSEBMYQBYZTDHS-HWKANZROSA-N 0.000 claims description 3
- 229940114124 ferulic acid Drugs 0.000 claims description 3
- KSEBMYQBYZTDHS-UHFFFAOYSA-N ferulic acid Natural products COC1=CC(C=CC(O)=O)=CC=C1O KSEBMYQBYZTDHS-UHFFFAOYSA-N 0.000 claims description 3
- RUTXIHLAWFEWGM-UHFFFAOYSA-H iron(3+) sulfate Chemical compound [Fe+3].[Fe+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O RUTXIHLAWFEWGM-UHFFFAOYSA-H 0.000 claims description 3
- 229910000360 iron(III) sulfate Inorganic materials 0.000 claims description 3
- QURCVMIEKCOAJU-UHFFFAOYSA-N trans-isoferulic acid Natural products COC1=CC=C(C=CC(O)=O)C=C1O QURCVMIEKCOAJU-UHFFFAOYSA-N 0.000 claims description 3
- 229910001385 heavy metal Inorganic materials 0.000 abstract description 8
- 230000008901 benefit Effects 0.000 abstract description 7
- 238000005265 energy consumption Methods 0.000 abstract description 3
- YTPLMLYBLZKORZ-UHFFFAOYSA-N Thiophene Chemical compound C=1C=CSC=1 YTPLMLYBLZKORZ-UHFFFAOYSA-N 0.000 description 32
- 229930192474 thiophene Natural products 0.000 description 16
- 239000008367 deionised water Substances 0.000 description 14
- 229910021641 deionized water Inorganic materials 0.000 description 14
- 238000006116 polymerization reaction Methods 0.000 description 14
- 238000005406 washing Methods 0.000 description 13
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 12
- 238000003756 stirring Methods 0.000 description 11
- 230000008569 process Effects 0.000 description 7
- 229920001609 Poly(3,4-ethylenedioxythiophene) Polymers 0.000 description 6
- 239000002253 acid Substances 0.000 description 6
- 239000003599 detergent Substances 0.000 description 6
- 238000001878 scanning electron micrograph Methods 0.000 description 6
- 239000000126 substance Substances 0.000 description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 5
- 229910052742 iron Inorganic materials 0.000 description 5
- 229910052709 silver Inorganic materials 0.000 description 5
- 239000004332 silver Substances 0.000 description 5
- TXUICONDJPYNPY-UHFFFAOYSA-N (1,10,13-trimethyl-3-oxo-4,5,6,7,8,9,11,12,14,15,16,17-dodecahydrocyclopenta[a]phenanthren-17-yl) heptanoate Chemical compound C1CC2CC(=O)C=C(C)C2(C)C2C1C1CCC(OC(=O)CCCCCC)C1(C)CC2 TXUICONDJPYNPY-UHFFFAOYSA-N 0.000 description 4
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 4
- 229910021626 Tin(II) chloride Inorganic materials 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
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- 239000001119 stannous chloride Substances 0.000 description 4
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- 241001122767 Theaceae Species 0.000 description 3
- 239000012295 chemical reaction liquid Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
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- 230000000379 polymerizing effect Effects 0.000 description 3
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- 241000237536 Mytilus edulis Species 0.000 description 2
- 230000000844 anti-bacterial effect Effects 0.000 description 2
- YCIMNLLNPGFGHC-UHFFFAOYSA-N catechol Chemical group OC1=CC=CC=C1O YCIMNLLNPGFGHC-UHFFFAOYSA-N 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
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- 235000020638 mussel Nutrition 0.000 description 2
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- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
- D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
- D06M15/37—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
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- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
- D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
- D06M15/37—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- D06M15/53—Polyethers
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- D06M16/00—Biochemical treatment of fibres, threads, yarns, fabrics, or fibrous goods made from such materials, e.g. enzymatic
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- D06M2101/00—Chemical constitution of the fibres, threads, yarns, fabrics or fibrous goods made from such materials, to be treated
- D06M2101/16—Synthetic fibres, other than mineral fibres
- D06M2101/30—Synthetic polymers consisting of macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- D06M2101/34—Polyamides
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Abstract
The invention provides a method for preparing polythiophene composite nylon conductive fiber, which comprises the following steps: soaking nylon fiber in water solution containing polyphenol compound at 60-70 deg.c to react, adding water soluble oxidant into the water solution, and further reaction at 70-80 deg.c to obtain polyphenol polymerized nylon fiber; soaking the nylon fiber polymerized by polyphenol into a reaction solution containing trivalent ferric salt, a macromolecular dispersant and a thiophene derivative to react under the conditions of 20-30 ℃ and pH of 0.5-3 to obtain the polythiophene composite nylon conductive fiber. The preparation method of the polythiophene composite nylon conductive fiber provided by the invention does not need a heavy metal sensitizer and heavy metal main salt, and is green and environment-friendly; the pretreatment of the nylon fiber by a strong oxidant is not needed, and the strength of the nylon fiber is reserved; the strong binding force between the conductive layer and the nylon fiber can be obtained; the method has the advantages of low energy consumption, short reaction period, simple operation and high energy utilization rate.
Description
Technical Field
The invention relates to the technical field of fiber modification preparation, in particular to a polythiophene composite nylon conductive fiber and a preparation method thereof.
Background
Along with the development of industry, the variety and the quantity of various household appliances and electronic equipment are increasing day by day, people also have higher and higher attention to antistatic fiber, and along with the improvement of people's living standard and the enhancement of consciousness on self health protection, the popularization and use of civilian conductive fiber inevitably becomes a trend. Therefore, the technology for preparing conductive fibers is also continuously developed, wherein a main part of the technology is to prepare conductive fibers by using a chemical silvering method, and among a plurality of fibers, nylon fibers have a smooth surface and complete structure and few active reaction groups, so that the technology is one of the main problems to be overcome by antistatic fibers for improving the conductivity of the nylon fibers.
Bionic mussel chemistry represented by polyphenol oxidative autopolymerization is greatly concerned in material field due to high utilization rate, excellent effect and environmental protection, and is widely applied to material surface interface modification and functional treatment, wherein an invention patent with application number 201811166015.x discloses a novel natural environment-friendly textile dye prepared by tea polyphenol oxidative autopolymerization; the invention patent of application No. 202011158029.4 discloses a tea fiber rich in tea polyphenol and capable of protecting skin and resisting bacteria and a preparation method thereof; the invention patent application No. 202010492930.9 discloses a method for preparing a filter membrane by utilizing polydopamine modified nanofiber coating base.
Conductive polymers are considered as new materials in the 21 st century because of their excellent thermal and chemical stability, high charge storage capacity, good electrochemical properties and gas separation performance. Polythiophene has attracted great interest to researchers due to the characteristics of excellent electrical performance, easy preparation, good thermal stability, high use value after being compounded with other general polymers, and the like.
The application of the silver-plated nylon conductive fiber is very wide, the surface of the nylon fiber is metalized by mainly adopting a chemical silver plating method at present, and the invention patent of application number 201011373886.3 discloses a method for preparing the silver-plated conductive nylon fiber by sensitizing the nylon fiber by utilizing stannous chloride; application No.: the invention patent of 201910343930.x discloses an antioxidant silver-plated nylon fiber with a protective film; application No. 201410148781.9 discloses a method for manufacturing a silver-plated electromagnetic shielding lining cloth by using silver-plated nylon.
The common defects of the existing chemical silver plating process are that a sensitizer stannous chloride and a solution containing silver ions adopted in the chemical silver plating process belong to heavy metals, the toxicity is high, and respiratory tract infection, skin diseases and other problems are easily caused in the production and processing processes, so that the requirements on production workshops, production equipment and worker protection are extremely high; in addition, the nylon has smooth surface and few reactive groups, and the strength of the nylon fiber is greatly reduced by the pretreatment of a strong oxidant; if the pretreatment of the strong oxidant is not carried out, the silver coating and the nylon fiber are not firmly combined and are easy to fall off; therefore, a heavy metal sensitizer and main salt are not used, and the environment is protected; strong oxidant pretreatment is not needed, and the strength of the nylon fiber is kept; the preparation method of the nylon conductive fiber with the conductive layer firmly combined with the nylon fiber is very important for the development of the fields of static resistance, electromagnetic shielding, composite materials and the like.
Disclosure of Invention
The invention aims to provide a polythiophene composite nylon conductive fiber and a preparation method thereof.
The purpose of the invention is realized by the following technical scheme:
the invention provides a method for preparing polythiophene composite nylon conductive fiber, which comprises the following steps:
(1) soaking nylon fiber in water solution containing polyphenol compound at 60-70 deg.c, adding water soluble oxidant to the solution to obtain reaction liquid, and further reaction at 70-80 deg.c to obtain polyphenol polymerized nylon fiber; the polyphenol compound is a polyphenol compound containing catechol groups, preferably the reaction time is 20-100min, and further preferably the water-soluble oxidizing agent comprises sodium perborate, sodium persulfate and potassium perborate;
(2) and (2) soaking the polyphenol polymerized nylon fiber obtained in the step (1) into a reaction solution containing a trivalent ferric salt, a polymeric dispersant and a thiophene derivative at the temperature of 20-30 ℃ and the pH value of 0.5-3 to react to obtain the polythiophene composite nylon conductive fiber.
Further, before the step (1), the method also comprises a step (1 a): soaking nylon fiber in 20-100mL/L sulfuric acid at 40-60 deg.c for 20-120 min, washing and dewatering. This step can roughen the surface of the fiber, providing more reaction sites.
Further, in the step (2), the ferric salt comprises ferric trichloride and/or ferric sulfate, and the concentration of the ferric salt in the reaction solution is 0.006-0.02 mol/L.
Further, in the step (2), the polymeric dispersant comprises sodium polystyrene sulfonate, and the concentration of the polymeric dispersant in the reaction solution is 0.5-2 g/L.
Further, the thiophene derivative comprises 3, 4-ethylenedioxythiophene, and the concentration of the thiophene derivative in the reaction liquid is 0.0007-0.02 mol/L.
Further, in the step (1), the polyphenol compound is selected from one or more of eugenol, tannic acid, ferulic acid and chlorogenic acid; the concentration of the aqueous solution of the polyphenol compound is 1g/L-5 g/L; the water-soluble oxidizing agent comprises sodium perborate, sodium persulfate and potassium perborate, and the concentration of the water-soluble oxidizing agent in the reaction liquid is 1g/L-3 g/L.
Further, in step (2), the pH of the reaction solution is adjusted by adding sulfuric acid.
Further, the nylon fiber comprises one or more of nylon 56, nylon 66 and nylon 6 fiber which are stranded. Further, after the step (3), the method also comprises a step (4): and cleaning and dehydrating the silver-plated nylon conductive fibers, and drying at 90-140 ℃ for 2-10 min.
Further, after the step (3), the method also comprises a step (4): and (3) cleaning and dehydrating the polythiophene composite nylon conductive fiber, and drying at 80-110 ℃ for 5-30 min.
The bionic mussel chemical represented by polyphenol oxidative autopolymerization is natural polyphenol, replaces a sensitizing agent stannous chloride in the traditional process, is green and environment-friendly, ensures that the fiber strength is hardly influenced, ensures that polymerized polyphenol has strong adhesion, can be deposited on various materials to serve as a secondary reaction platform, and solves the problem of low fastness of subsequent polythiophene. Compared with the traditional preparation method of the conductive fiber, the thiophene does not contain heavy metal components, is green and environment-friendly, has higher utilization rate and low cost, and provides a new idea for preparing the novel conductive nylon fiber.
The invention also aims to provide a polythiophene composite nylon conductive fiber prepared by any one of the preparation methods.
Furthermore, the polythiophene composite nylon conductive fiber comprises a nylon fiber body, wherein a polyphenol layer and a conductive layer are sequentially arranged on the surface of the nylon fiber body from inside to outside, and the conductive layer comprises a plurality of polythiophene macromolecular chains.
Further, the thickness of the conductive layer is 50-400 nm.
Further, the thickness of the polyphenol polymer layer is 1.5nm-2.2 μm.
The principle of the preparation method provided by the invention is as follows:
firstly, the surface of the fiber can be selectively roughened by sulfuric acid, and the roughening of the sulfuric acid can degrade part of polyamide and expose more carboxyl and amino in the fiber to form a reactive site. Then the polyphenol is easily oxidized and self-polymerized under the condition of an oxidant and alkali, catechol groups in the polyphenol are induced to be oxidized into quinones, Michael addition and Schiff reaction (the related reaction formula is shown in figure 2) are carried out, covalent cross-linking grafting is formed on the surface of the fiber, and an inert surface is converted into a high-activity polyphenol surface; secondly, after the iron ions are added, the polyphenol is combined with the iron ions through specific coordination to construct an effective iron ion adsorption layer; the iron ions play a role in catalyzing, oxidizing and polymerizing in the process of polymerizing the thiophene, so that the thiophene is polymerized on the surface of the fiber, and the iron ions further play a role in doping the conductivity of the polythiophene after the thiophene is polymerized, so that the conductivity of the polythiophene is improved. In addition, a polymer dispersant is added in the process of polymerizing thiophene, and the polymer dispersant is also used as a dispersant during doping, so that a stable water dispersion system is provided, thiophene is promoted to form a stable suspension, the thiophene is further uniformly polymerized on the surface of nylon fibers, and the conductive capacity of the fibers is improved.
By the scheme, the invention at least has the following advantages:
the preparation method of the polythiophene composite nylon conductive fiber provided by the invention does not need to use a heavy metal sensitizer, such as stannous chloride, or heavy metal main salt, and the preparation process is nontoxic and environment-friendly; the nylon fiber is not required to be subjected to strong oxidant pretreatment, the strength of the nylon fiber is maintained, and meanwhile, the polyphenol on the surface of the fiber has strong adhesion, can be used as a reaction platform of polythiophene, and can obtain strong bonding force between a conductive layer and the nylon fiber; the method has the advantages of low energy consumption, short reaction period, simple operation and high energy utilization rate, and can enlarge the use value of the nylon fiber and increase the added value of the product.
The polythiophene composite nylon conductive fiber provided by the invention has the advantages of high fiber strength, firm combination of the conductive layers and difficulty in falling off, and meanwhile, the polyphenol has good biocompatibility, and has the natural antibacterial and anti-mite performances, and the prepared conductive nylon fiber integrates multiple functions.
The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical solutions of the present invention more clearly understood and to implement them in accordance with the contents of the description, the following description is made with reference to the preferred embodiments of the present invention and the accompanying detailed drawings.
Drawings
FIG. 1 is SEM images of the surfaces of nylon fibers before (a) finishing in example one, after (b) finishing in example one, after (c) finishing in example one, after (d) finishing in example two, and after (e) finishing in example three.
FIG. 2(a) is a Michael addition reaction formula and FIG. 2(b) is a Schiff reaction formula.
Detailed Description
The following describes in detail a specific embodiment of the present invention with reference to the drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
Example one
a) Cleaning of nylon 56 fiber: cleaning with detergent to remove oil and dirt on the surface of the nylon fiber for later use;
b) coarsening of nylon 56 fiber: soaking clean nylon 56 fiber in 20mL/L sulfuric acid at 40 deg.C, washing and dewatering after 60 min;
c) polymerization of polyphenols on the fiber surface: soaking the coarsened nylon 56 fiber obtained in the step b) in an aqueous solution containing 2g/L of tannic acid, oscillating for 30min at the temperature of 60 ℃, adding sodium perborate until the concentration of the aqueous solution is 3g/L, oscillating for 20min at the temperature of 70 ℃ to polymerize polyphenol on the surface of the fiber, and taking out the fiber, cleaning and dehydrating;
d) polymerization of thiophene on the surface of nylon fiber: sequentially adding anhydrous ferric trichloride into deionized water to enable the concentration of the ferric trichloride to be 3g/L, sodium polystyrene sulfonate to enable the concentration of the sodium polystyrene sulfonate to be 0.5g/L, 3, 4-ethylenedioxythiophene to enable the concentration of the sodium polystyrene sulfonate to be 0.1g/L, uniformly stirring, putting the nylon fiber treated in the step c under the strong acid condition of 20 ℃, and stirring for 7 hours;
e) cleaning and curing: and after the fibers are taken out, repeatedly washing the fibers by using ethanol and deionized water until the solution is clear, and quickly drying the fibers at the high temperature of 100 ℃ for 20 minutes to obtain the conductive nylon 56 fibers coated with the poly (3, 4-ethylenedioxythiophene).
FIG. 1(a) is an SEM image of the surface of the nylon 56 fiber before finishing in step a) of the present example; FIG. 1(b) is a SEM image (low magnification) of the surface of the nylon 56 fiber after finishing in example one; FIG. 1(c) is an SEM image (high magnification) of the surface of the fiber of nylon 56 after finishing in example one; the surface of the nylon 56 fiber is smooth before finishing, and the surface of the nylon 56 fiber is coated with dense polythiophene and is rough after finishing;
in the first table, the strength of the fiber at each stage is changed in the treatment process of preparing the polythiophene conductive nylon fiber after polymerization of polyphenol by tannic acid in the first embodiment, and it can be seen that the strength of the fiber after polymerization of tannin is almost unchanged, which has great advantage in the aspect of fiber strength.
Example two
a) Cleaning of nylon 56 fiber: cleaning with detergent to remove oil and dirt on the surface of the nylon fiber for later use;
b) coarsening of nylon 56 fiber: soaking clean nylon 56 fiber with 30mL/L sulfuric acid at 40 ℃, washing and dehydrating after 60 minutes;
c) polymerization of polyphenols on the fiber surface: soaking the coarsened nylon fiber obtained in the step b) in an aqueous solution containing 2g/L of ferulic acid, oscillating for 40min at 60 ℃, adding sodium perborate until the concentration of the aqueous solution is 3g/L, oscillating for 20min at 70 ℃ to polymerize polyphenol on the surface of the fiber, taking out the fiber, cleaning and dehydrating;
d) polymerization of thiophene on the surface of nylon fiber: adding anhydrous ferric trichloride into deionized water in sequence to make the concentration of the anhydrous ferric trichloride be 3g/L, adding sodium polystyrene sulfonate into the deionized water in sequence to make the concentration of the sodium polystyrene sulfonate be 0.5g/L, adding 3, 4-ethylenedioxythiophene into the deionized water in sequence to make the concentration of the 3, 4-ethylenedioxythiophene be 0.3g/L, and uniformly stirring. And c, placing the nylon fiber treated in the step c under a strong acid condition of 30 ℃, and stirring for 8 hours.
e) And after the fibers are taken out, repeatedly washing the fibers by using ethanol and deionized water until the solution is clear, and quickly drying the fibers at the high temperature of 90 ℃ for 30 minutes to obtain the conductive nylon 56 fibers coated with the poly (3, 4-ethylenedioxythiophene).
FIG. 1(d) is an SEM image of the surface of the nylon 56 fiber finished by the second example, wherein the surface of the nylon 56 fiber is coated with dense polythiophene and has rough surface;
the second table shows that the polythiophene composite nylon conductive fiber prepared by the second embodiment has better conductive performance.
EXAMPLE III
a) Cleaning of nylon 56 fiber: cleaning with detergent to remove oil and dirt on the surface of the nylon fiber for later use;
b) coarsening of nylon 56 fiber: soaking clean nylon 56 fiber in 20mL/L sulfuric acid at 40 deg.C, washing and dewatering after 60 min;
c) polymerization of polyphenols on the fiber surface: soaking the coarsened nylon fiber obtained in the step b) in an aqueous solution containing 2g/L of eugenol, oscillating for 20min at 70 ℃, adding potassium perborate until the concentration of the aqueous solution is 2g/L, oscillating for 30min at 70 ℃ to polymerize polyphenol on the surface of the fiber, taking out the fiber, cleaning and dehydrating;
d) polymerization of thiophene on the surface of nylon fiber: adding anhydrous ferric trichloride into deionized water in sequence to make the concentration of the ferric trichloride be 3g/L, adding sodium polystyrene sulfonate to make the concentration of the sodium polystyrene sulfonate be 0.5g/L, adding 3, 4-ethylenedioxythiophene to make the concentration of the sodium polystyrene sulfonate be 0.5g/L, and uniformly stirring. C, under the strong acid condition of 20 ℃, putting the nylon fiber treated in the step c, and stirring for 7 hours;
e) cleaning and curing: and after the fibers are taken out, repeatedly washing the fibers by using ethanol and deionized water until the solution is clear, and quickly drying the fibers at the high temperature of 90 ℃ for 30 minutes to obtain the conductive nylon 56 fibers coated with the poly (3, 4-ethylenedioxythiophene).
FIG. 1(e) is an SEM image of the nylon 56 fiber finished by the method, and the surface of the nylon 56 fiber finished is coated with dense polythiophene and has rough surface.
The second table shows that the polythiophene composite nylon conductive fiber prepared by the third embodiment has better conductive performance.
Example four
a) Cleaning of nylon 56 fiber: cleaning with detergent to remove oil and dirt on the surface of the nylon 56 fiber for later use;
b) coarsening of nylon 56 fiber: soaking clean nylon 56 fiber with 30mL/L sulfuric acid at 40 ℃, washing and dehydrating after 60 minutes;
c) polymerization of polyphenols on the fiber surface: b, soaking the coarsened nylon fiber in the step b into an aqueous solution containing 2g/L chlorogenic acid, oscillating for 20min at 75 ℃, adding sodium persulfate till the concentration of the aqueous solution is 3g/L, oscillating for 30min at 75 ℃ to polymerize polyphenol on the surface of the fiber, taking out the fiber, cleaning and dehydrating;
d) polymerization of thiophene on the surface of nylon fiber: ferric sulfate with the concentration of 3g/L, sodium polystyrene sulfonate with the concentration of 0.5g/L and 3, 4-ethylenedioxythiophene with the concentration of 2g/L are sequentially added into deionized water, and the mixture is uniformly stirred. C, under the strong acid condition of 25 ℃, putting the nylon 56 fiber treated in the step c, and stirring for 8 hours;
e) cleaning and curing: and after the fibers are taken out, repeatedly washing the fibers by using ethanol and deionized water until the solution is clear, and quickly drying the fibers at the high temperature of 100 ℃ for 20 minutes to obtain the conductive nylon 56 fibers coated with the poly (3, 4-ethylenedioxythiophene).
The surface of the nylon 56 fiber is coated with compact polythiophene after being finished by chlorogenic acid and thiophene, and the fiber has rough surface and certain fastness, strength and conductivity.
EXAMPLE five
a) Cleaning of nylon 66 fiber: cleaning with detergent to remove oil and dirt on the surface of the nylon 66 fiber for later use;
b) coarsening of nylon 66 fiber: soaking clean nylon 66 fiber by using sulfuric acid with the concentration of 30mL/L at the temperature of 40 ℃, and washing and dehydrating after 60 minutes;
c) polymerization of polyphenols on the fiber surface: b, soaking the nylon fiber coarsened in the step b in an aqueous solution containing 2g/L of tannic acid, oscillating for 20min at 75 ℃, adding sodium perborate until the concentration of the aqueous solution is 3g/L, oscillating for 30min at 75 ℃ to polymerize polyphenol on the surface of the fiber, and taking out the fiber, cleaning and dehydrating;
d) polymerization of thiophene on the surface of nylon fiber: adding anhydrous ferric trichloride into deionized water in sequence to make the concentration of the ferric trichloride be 3g/L, adding sodium polystyrene sulfonate to make the concentration of the sodium polystyrene sulfonate be 0.5g/L, adding 3, 4-ethylenedioxythiophene to make the concentration of the sodium polystyrene sulfonate be 2g/L, and uniformly stirring. C, under the strong acid condition of 25 ℃, putting the nylon fiber treated in the step c, and stirring for 8 hours;
e) cleaning and curing: and after the fibers are taken out, repeatedly washing the fibers by using ethanol and deionized water until the solution is clear, and quickly drying the fibers at a high temperature of 90 ℃ for 25 minutes to obtain the conductive nylon 66 fibers coated with the poly (3, 4-ethylenedioxythiophene).
The surface of the nylon 66 fiber finished by the tannic acid and the thiophene is coated with the compact polythiophene, the surface of the fiber is rough and has certain fastness and strength, and the polythiophene composite nylon conductive fiber prepared by the method provided by the embodiment has good conductivity by combining the table II;
EXAMPLE six
a) Cleaning of nylon 6 fiber: cleaning with detergent to remove oil and dirt on the surface of the nylon fiber for later use;
b) coarsening the nylon 6 fiber: soaking clean nylon fiber with 40mL/L sulfuric acid at 40 ℃, washing and dehydrating after 60 minutes;
c) polymerization of polyphenols on the fiber surface: b, soaking the coarsened nylon 6 fiber in an aqueous solution containing 2g/L of eugenol, oscillating for 30min at 70 ℃, adding sodium perborate until the concentration of the aqueous solution is 3g/L, oscillating for 30min at 75 ℃ to polymerize polyphenol on the surface of the fiber, taking out the fiber, cleaning and dehydrating;
d) polymerization of thiophene on the surface of nylon fiber: adding anhydrous ferric trichloride into deionized water in sequence to make the concentration of the ferric trichloride be 3g/L, adding sodium polystyrene sulfonate to make the concentration of the sodium polystyrene sulfonate be 0.5g/L, and making the concentration of the 3, 4-ethylenedioxythiophene be 2g/L, and uniformly stirring them. C, under the strong acid condition of 25 ℃, putting the nylon 6 fiber treated in the step c, and stirring for 8 hours;
e) cleaning and curing: and after the fiber is taken out, repeatedly washing the fiber by using ethanol and deionized water until the solution is clear, and quickly drying the fiber at the high temperature of 80 ℃ for 30 minutes to obtain the conductive nylon 6 fiber with the surface coated with the poly (3, 4-ethylenedioxythiophene).
The nylon 6 fiber surface finished by the eugenol and the thiophene is coated with the compact polythiophene, the fiber surface is rough and has certain fastness and strength, and the polythiophene composite nylon conductive fiber prepared by the method provided by the embodiment has good conductivity by combining the table II;
and (3) performance testing:
the conductive fibers prepared in the above examples were subjected to fiber mechanics (according to GBT14337-2008), electrical property testing (according to FZ/T52032-.
TABLE I EXAMPLE I Strength of the resulting product at various stages
TABLE II conductivity of the nylon conductive fibers prepared in the different examples
TABLE III soaping fastness of the Nylon conductive fiber prepared in EXAMPLE I
| Number of soaping | 1 | 2 | 3 | 4 | 5 |
| Conductivity S/cm | 37.35 | 45.22 | 46.30 | 47.02 | 47.56 |
| Number of soaping | 6 | 7 | 8 | 9 | 10 |
| Conductivity S/cm | 47.88 | 48.02 | 48.07 | 48.18 | 48.22 |
Through the above embodiments, it is clear that the preparation method of the polythiophene composite nylon conductive fiber provided by the invention is environment-friendly without using a heavy metal sensitizer and a main salt; the pretreatment of the nylon fiber by a strong oxidant is not needed, the strength of the nylon fiber is reserved, and meanwhile, the strong binding force between the conductive layer and the nylon fiber can be obtained; the method has the advantages of low energy consumption, short reaction period, simple operation and high energy utilization rate, and can enlarge the use value of the nylon fiber and increase the added value of the product.
The polythiophene composite nylon conductive fiber provided by the invention has the advantages of high fiber strength, firm combination of the conductive layers and difficulty in falling off, and meanwhile, the polyphenol has good biocompatibility, and has the natural antibacterial and anti-mite performances, and the prepared conductive nylon fiber integrates multiple functions.
The above is only a preferred embodiment of the present invention and is not intended to limit the present invention, it should be noted that, for those skilled in the art, many modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (10)
1. A method for preparing polythiophene composite nylon conductive fiber is characterized by comprising the following steps:
(1) soaking nylon fiber in water solution containing polyphenol compound at 60-70 deg.c to react, adding water soluble oxidant into the water solution, and further reaction at 70-80 deg.c to obtain polyphenol polymerized nylon fiber; the polyphenol compounds are selected from one or more of eugenol, tannic acid, ferulic acid and chlorogenic acid; the concentration of the aqueous solution of the polyphenol compound is 1g/L-5 g/L;
(2) and (2) immersing the nylon fiber polymerized by the polyphenol obtained in the step (1) into a reaction solution containing a trivalent ferric salt, a polymeric dispersant and a thiophene derivative to react at the temperature of 20-30 ℃ and the pH value of 0.5-3 to obtain the polythiophene composite nylon conductive fiber.
2. The method according to claim 1, characterized by further comprising, before step (1), step (1 a): soaking the nylon fiber in sulfuric acid with the concentration of 20-100mL/L for 20-120 minutes at the temperature of 40-60 ℃.
3. The method according to claim 1, wherein in the step (2), the ferric salt comprises ferric trichloride and/or ferric sulfate, and the concentration of the ferric salt in the reaction solution is 0.006-0.02 mol/L.
4. The method according to claim 1, wherein in the step (2), the polymeric dispersant comprises sodium polystyrene sulfonate, and the concentration of the polymeric dispersant in the reaction solution is 0.5 to 2 g/L.
5. The method according to claim 1, wherein in the step (2), the thiophene derivative comprises 3, 4-ethylenedioxythiophene, and the concentration of the thiophene derivative in the reaction solution is 0.0007 to 0.02 mol/L.
6. The method according to claim 1, wherein in step (1), the water-soluble oxidizing agent comprises one or more of sodium perborate, sodium persulfate and potassium perborate, and the concentration of the water-soluble oxidizing agent in the reaction solution is 1g/L-3 g/L.
7. The method according to claim 1, wherein in the step (2), the pH of the reaction solution is adjusted by adding sulfuric acid.
8. The method of any one of claims 1-7, wherein the nylon fibers comprise one or more of nylon 56, nylon 66, and nylon 6 fibers that are plied together.
9. The method of claim 1, wherein: after the step (3), further comprising a step (4): and (3) cleaning and dehydrating the polythiophene composite nylon conductive fiber, and drying at 80-110 ℃ for 5-30 min.
10. A polythiophene composite nylon conductive fiber prepared by the method of any one of claims 1 to 9.
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