CN114213683A - Preparation method of high-concentration keratin eutectic system solution - Google Patents
Preparation method of high-concentration keratin eutectic system solution Download PDFInfo
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- CN114213683A CN114213683A CN202111646480.5A CN202111646480A CN114213683A CN 114213683 A CN114213683 A CN 114213683A CN 202111646480 A CN202111646480 A CN 202111646480A CN 114213683 A CN114213683 A CN 114213683A
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- eutectic system
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- 230000005496 eutectics Effects 0.000 title claims abstract description 86
- 102000011782 Keratins Human genes 0.000 title claims abstract description 77
- 108010076876 Keratins Proteins 0.000 title claims abstract description 77
- 238000002360 preparation method Methods 0.000 title claims abstract description 11
- 239000000835 fiber Substances 0.000 claims abstract description 59
- 210000004209 hair Anatomy 0.000 claims abstract description 40
- 238000000034 method Methods 0.000 claims abstract description 31
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 27
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims description 71
- 239000000243 solution Substances 0.000 claims description 52
- 210000002268 wool Anatomy 0.000 claims description 43
- 239000000843 powder Substances 0.000 claims description 36
- 239000004202 carbamide Substances 0.000 claims description 35
- 238000010438 heat treatment Methods 0.000 claims description 22
- 238000003756 stirring Methods 0.000 claims description 22
- 239000007788 liquid Substances 0.000 claims description 15
- 239000002202 Polyethylene glycol Substances 0.000 claims description 14
- 229920001223 polyethylene glycol Polymers 0.000 claims description 14
- YICAEXQYKBMDNH-UHFFFAOYSA-N 3-[bis(3-hydroxypropyl)phosphanyl]propan-1-ol Chemical group OCCCP(CCCO)CCCO YICAEXQYKBMDNH-UHFFFAOYSA-N 0.000 claims description 13
- 239000002245 particle Substances 0.000 claims description 12
- 238000002156 mixing Methods 0.000 claims description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 11
- 241000287828 Gallus gallus Species 0.000 claims description 8
- DGVVWUTYPXICAM-UHFFFAOYSA-N β‐Mercaptoethanol Chemical compound OCCS DGVVWUTYPXICAM-UHFFFAOYSA-N 0.000 claims description 7
- PWKSKIMOESPYIA-UHFFFAOYSA-N 2-acetamido-3-sulfanylpropanoic acid Chemical compound CC(=O)NC(CS)C(O)=O PWKSKIMOESPYIA-UHFFFAOYSA-N 0.000 claims description 6
- DNJIEGIFACGWOD-UHFFFAOYSA-N ethyl mercaptane Natural products CCS DNJIEGIFACGWOD-UHFFFAOYSA-N 0.000 claims description 6
- DWAQJAXMDSEUJJ-UHFFFAOYSA-M Sodium bisulfite Chemical compound [Na+].OS([O-])=O DWAQJAXMDSEUJJ-UHFFFAOYSA-M 0.000 claims description 4
- 239000003795 chemical substances by application Substances 0.000 claims description 4
- 230000000149 penetrating effect Effects 0.000 claims description 4
- 235000010267 sodium hydrogen sulphite Nutrition 0.000 claims description 4
- PZBFGYYEXUXCOF-UHFFFAOYSA-N TCEP Chemical compound OC(=O)CCP(CCC(O)=O)CCC(O)=O PZBFGYYEXUXCOF-UHFFFAOYSA-N 0.000 claims description 3
- 238000002203 pretreatment Methods 0.000 claims description 3
- 238000009987 spinning Methods 0.000 claims description 3
- 241000272525 Anas platyrhynchos Species 0.000 claims description 2
- 241000272814 Anser sp. Species 0.000 claims description 2
- 241000282836 Camelus dromedarius Species 0.000 claims description 2
- 241000283973 Oryctolagus cuniculus Species 0.000 claims description 2
- 239000011248 coating agent Substances 0.000 claims description 2
- 238000000576 coating method Methods 0.000 claims description 2
- 210000000050 mohair Anatomy 0.000 claims description 2
- 239000011148 porous material Substances 0.000 claims description 2
- 238000011978 dissolution method Methods 0.000 claims 1
- 238000004090 dissolution Methods 0.000 abstract description 54
- 238000011069 regeneration method Methods 0.000 abstract description 3
- 230000008929 regeneration Effects 0.000 abstract description 2
- 230000007613 environmental effect Effects 0.000 abstract 1
- 239000001763 2-hydroxyethyl(trimethyl)azanium Substances 0.000 description 23
- 235000019743 Choline chloride Nutrition 0.000 description 23
- SGMZJAMFUVOLNK-UHFFFAOYSA-M choline chloride Chemical compound [Cl-].C[N+](C)(C)CCO SGMZJAMFUVOLNK-UHFFFAOYSA-M 0.000 description 23
- 229960003178 choline chloride Drugs 0.000 description 23
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 description 15
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 12
- 239000001257 hydrogen Substances 0.000 description 12
- 229910052739 hydrogen Inorganic materials 0.000 description 12
- XUJNEKJLAYXESH-REOHCLBHSA-N L-Cysteine Chemical compound SC[C@H](N)C(O)=O XUJNEKJLAYXESH-REOHCLBHSA-N 0.000 description 10
- 238000012216 screening Methods 0.000 description 9
- 239000002904 solvent Substances 0.000 description 9
- 239000008399 tap water Substances 0.000 description 8
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- 238000001035 drying Methods 0.000 description 7
- 230000009467 reduction Effects 0.000 description 7
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 6
- DBMJMQXJHONAFJ-UHFFFAOYSA-M Sodium laurylsulphate Chemical compound [Na+].CCCCCCCCCCCCOS([O-])(=O)=O DBMJMQXJHONAFJ-UHFFFAOYSA-M 0.000 description 6
- 239000000370 acceptor Substances 0.000 description 6
- 210000003746 feather Anatomy 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 6
- 230000002829 reductive effect Effects 0.000 description 6
- 238000012360 testing method Methods 0.000 description 6
- CWERGRDVMFNCDR-UHFFFAOYSA-N thioglycolic acid Chemical compound OC(=O)CS CWERGRDVMFNCDR-UHFFFAOYSA-N 0.000 description 6
- 239000004201 L-cysteine Substances 0.000 description 5
- 235000013878 L-cysteine Nutrition 0.000 description 5
- 229960001231 choline Drugs 0.000 description 5
- OEYIOHPDSNJKLS-UHFFFAOYSA-N choline Chemical compound C[N+](C)(C)CCO OEYIOHPDSNJKLS-UHFFFAOYSA-N 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 102000004169 proteins and genes Human genes 0.000 description 5
- 108090000623 proteins and genes Proteins 0.000 description 5
- 238000002791 soaking Methods 0.000 description 5
- 230000009471 action Effects 0.000 description 4
- 230000015556 catabolic process Effects 0.000 description 4
- 238000006731 degradation reaction Methods 0.000 description 4
- JVTAAEKCZFNVCJ-UHFFFAOYSA-N lactic acid Chemical compound CC(O)C(O)=O JVTAAEKCZFNVCJ-UHFFFAOYSA-N 0.000 description 4
- -1 sulfhydryl compound Chemical class 0.000 description 4
- UMGDCJDMYOKAJW-UHFFFAOYSA-N thiourea Chemical compound NC(N)=S UMGDCJDMYOKAJW-UHFFFAOYSA-N 0.000 description 4
- 239000007864 aqueous solution Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000001914 filtration Methods 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 229940071127 thioglycolate Drugs 0.000 description 3
- CWERGRDVMFNCDR-UHFFFAOYSA-M thioglycolate(1-) Chemical compound [O-]C(=O)CS CWERGRDVMFNCDR-UHFFFAOYSA-M 0.000 description 3
- PUPZLCDOIYMWBV-UHFFFAOYSA-N (+/-)-1,3-Butanediol Chemical compound CC(O)CCO PUPZLCDOIYMWBV-UHFFFAOYSA-N 0.000 description 2
- BJEPYKJPYRNKOW-REOHCLBHSA-N (S)-malic acid Chemical compound OC(=O)[C@@H](O)CC(O)=O BJEPYKJPYRNKOW-REOHCLBHSA-N 0.000 description 2
- NRKYWOKHZRQRJR-UHFFFAOYSA-N 2,2,2-trifluoroacetamide Chemical compound NC(=O)C(F)(F)F NRKYWOKHZRQRJR-UHFFFAOYSA-N 0.000 description 2
- WLJVXDMOQOGPHL-PPJXEINESA-N 2-phenylacetic acid Chemical compound O[14C](=O)CC1=CC=CC=C1 WLJVXDMOQOGPHL-PPJXEINESA-N 0.000 description 2
- KWIUHFFTVRNATP-UHFFFAOYSA-N Betaine Natural products C[N+](C)(C)CC([O-])=O KWIUHFFTVRNATP-UHFFFAOYSA-N 0.000 description 2
- 229930091371 Fructose Natural products 0.000 description 2
- RFSUNEUAIZKAJO-ARQDHWQXSA-N Fructose Chemical compound OC[C@H]1O[C@](O)(CO)[C@@H](O)[C@@H]1O RFSUNEUAIZKAJO-ARQDHWQXSA-N 0.000 description 2
- 239000005715 Fructose Substances 0.000 description 2
- WQZGKKKJIJFFOK-GASJEMHNSA-N Glucose Natural products OC[C@H]1OC(O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-GASJEMHNSA-N 0.000 description 2
- KWIUHFFTVRNATP-UHFFFAOYSA-O N,N,N-trimethylglycinium Chemical compound C[N+](C)(C)CC(O)=O KWIUHFFTVRNATP-UHFFFAOYSA-O 0.000 description 2
- KDYFGRWQOYBRFD-UHFFFAOYSA-N Succinic acid Natural products OC(=O)CCC(O)=O KDYFGRWQOYBRFD-UHFFFAOYSA-N 0.000 description 2
- TVXBFESIOXBWNM-UHFFFAOYSA-N Xylitol Natural products OCCC(O)C(O)C(O)CCO TVXBFESIOXBWNM-UHFFFAOYSA-N 0.000 description 2
- BJEPYKJPYRNKOW-UHFFFAOYSA-N alpha-hydroxysuccinic acid Natural products OC(=O)C(O)CC(O)=O BJEPYKJPYRNKOW-UHFFFAOYSA-N 0.000 description 2
- 150000001413 amino acids Chemical class 0.000 description 2
- WQZGKKKJIJFFOK-VFUOTHLCSA-N beta-D-glucose Chemical compound OC[C@H]1O[C@@H](O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-VFUOTHLCSA-N 0.000 description 2
- 229960003237 betaine Drugs 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- KDYFGRWQOYBRFD-NUQCWPJISA-N butanedioic acid Chemical compound O[14C](=O)CC[14C](O)=O KDYFGRWQOYBRFD-NUQCWPJISA-N 0.000 description 2
- 150000001720 carbohydrates Chemical class 0.000 description 2
- 150000001735 carboxylic acids Chemical class 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 239000008103 glucose Substances 0.000 description 2
- 230000008595 infiltration Effects 0.000 description 2
- 238000001764 infiltration Methods 0.000 description 2
- 239000004310 lactic acid Substances 0.000 description 2
- 235000014655 lactic acid Nutrition 0.000 description 2
- 239000001630 malic acid Substances 0.000 description 2
- 235000011090 malic acid Nutrition 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- HEBKCHPVOIAQTA-UHFFFAOYSA-N meso ribitol Natural products OCC(O)C(O)C(O)CO HEBKCHPVOIAQTA-UHFFFAOYSA-N 0.000 description 2
- 239000000693 micelle Substances 0.000 description 2
- 229920005862 polyol Polymers 0.000 description 2
- 150000003077 polyols Chemical class 0.000 description 2
- 150000003242 quaternary ammonium salts Chemical class 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- 229910052979 sodium sulfide Inorganic materials 0.000 description 2
- GRVFOGOEDUUMBP-UHFFFAOYSA-N sodium sulfide (anhydrous) Chemical compound [Na+].[Na+].[S-2] GRVFOGOEDUUMBP-UHFFFAOYSA-N 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 239000000811 xylitol Substances 0.000 description 2
- HEBKCHPVOIAQTA-SCDXWVJYSA-N xylitol Chemical compound OC[C@H](O)[C@@H](O)[C@H](O)CO HEBKCHPVOIAQTA-SCDXWVJYSA-N 0.000 description 2
- 229960002675 xylitol Drugs 0.000 description 2
- 235000010447 xylitol Nutrition 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001112 coagulating effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000000502 dialysis Methods 0.000 description 1
- VHJLVAABSRFDPM-QWWZWVQMSA-N dithiothreitol Chemical compound SC[C@@H](O)[C@H](O)CS VHJLVAABSRFDPM-QWWZWVQMSA-N 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 229910017053 inorganic salt Inorganic materials 0.000 description 1
- 230000007794 irritation Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 230000001376 precipitating effect Effects 0.000 description 1
- 108090000765 processed proteins & peptides Proteins 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 239000008247 solid mixture Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 230000007928 solubilization Effects 0.000 description 1
- 238000005063 solubilization Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 238000010345 tape casting Methods 0.000 description 1
- 125000003396 thiol group Chemical group [H]S* 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
- 238000002166 wet spinning Methods 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J3/00—Processes of treating or compounding macromolecular substances
- C08J3/02—Making solutions, dispersions, lattices or gels by other methods than by solution, emulsion or suspension polymerisation techniques
- C08J3/09—Making solutions, dispersions, lattices or gels by other methods than by solution, emulsion or suspension polymerisation techniques in organic liquids
- C08J3/091—Making solutions, dispersions, lattices or gels by other methods than by solution, emulsion or suspension polymerisation techniques in organic liquids characterised by the chemical constitution of the organic liquid
- C08J3/096—Nitrogen containing compounds
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M13/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment
- D06M13/10—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment with compounds containing oxygen
- D06M13/165—Ethers
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M13/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment
- D06M13/244—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment with compounds containing sulfur or phosphorus
- D06M13/282—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment with compounds containing sulfur or phosphorus with compounds containing phosphorus
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M13/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment
- D06M13/322—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment with compounds containing nitrogen
- D06M13/402—Amides imides, sulfamic acids
- D06M13/432—Urea, thiourea or derivatives thereof, e.g. biurets; Urea-inclusion compounds; Dicyanamides; Carbodiimides; Guanidines, e.g. dicyandiamides
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2389/00—Characterised by the use of proteins; Derivatives thereof
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M2101/00—Chemical constitution of the fibres, threads, yarns, fabrics or fibrous goods made from such materials, to be treated
- D06M2101/02—Natural fibres, other than mineral fibres
- D06M2101/10—Animal fibres
- D06M2101/12—Keratin fibres or silk
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- General Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
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- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Cosmetics (AREA)
Abstract
The invention discloses a preparation method of a high-concentration keratin eutectic system solution, and belongs to the technical field of fiber dissolution and regeneration. According to the invention, the reducing agent is permeated into hair fibers in advance through the high-efficiency pretreatment solution, and the hair is dissolved by utilizing the non-reducing eutectic system, so that the keratin eutectic system solution with the concentration of 10-50% can be conveniently prepared. The method has the characteristics of high dissolving efficiency, simple operation, economy and environmental protection, and greatly reduces the preparation difficulty of the high-concentration keratin eutectic system solution.
Description
Technical Field
The invention relates to a preparation method of a high-concentration keratin eutectic system solution, belonging to the technical field of fiber dissolution and regeneration.
Background
The waste hair contains rich keratin, and if the waste hair can be dissolved and regenerated to obtain a high-concentration (more than or equal to 10 wt%) keratin solution, the application performance of the keratin material can be greatly improved. This is because highly concentrated solutions of keratin have a particular rheological behaviour, which can undergo molecular chain orientation under the action of shear forces, which changes facilitate the preparation of high-strength, high-modulus recycled materials.
The aqueous system reduction method represented by "reduced C" is the most common keratin solubilization method at present. The method mainly adopts high-concentration urea (usually 4-8moL/L), a reducing agent and Sodium Dodecyl Sulfate (SDS) to dissolve keratin. In the system, high-concentration urea is responsible for breaking up hydrogen bonds, a reducing agent is responsible for breaking up disulfide bonds, and SDS is used for stabilizing the system and preventing sulfhydryl groups from being recombined. The reducing agent used in the method is generally a sulfhydryl compound, such as thioglycolate, beta-mercaptoethanol, dithiothreitol and the like, and researchers also adopt reducing agents such as L-cysteine, sodium sulfide, sodium bisulfite and the like, but the extraction effect is not as high as that of the sulfhydryl compound. The biggest problems with this system are: the presence of large amounts of water limits the raveling of hydrogen bonds of keratin by urea, and the aqueous solutions of keratin prepared are not only very low in concentration (usually the keratin concentration obtained by direct dissolution is between 1 and 5 wt%), but also unstable, easily precipitated and require large amounts of SDS to stabilize. Because SDS isolates protein molecules in the system in a micelle form, keratin molecules in a solution cannot approach each other, and then an ordered high-regular folding structure cannot be formed; also, SDS foams easily and needs to be removed by dialysis during subsequent processing, which further reduces protein concentration and stability. Therefore, if the keratin solution produced by using the system is used for spinning or filming, the mechanical property of the obtained regenerated material is not high generally.
In recent years, with the rapid development of the eutectic system (DES), the eutectic system is widely used for dissolving and regenerating protein fibers. The eutectic system is formed by combining a hydrogen bond acceptor and a hydrogen bond donor in a stoichiometric ratio, such as a urea/choline chloride mixture in a molar ratio of 2: 1. Common hydrogen bond donors and acceptors that can compose eutectic systems are as follows: hydrogen bond donor: urea, thiourea, carboxylic acids (phenylacetic acid, malic acid, citric acid, succinic acid, etc.), polyols (ethylene glycol, glycerol, butylene glycol, xylitol, etc.), amino acids, saccharides (glucose, fructose) trifluoroacetamide, etc.; hydrogen bond acceptors: quaternary ammonium salts (such as choline chloride), zwitterions (such as betaine), and the like. However, studies show that most eutectic systems are non-reducing and cannot effectively break off a large number of disulfide bonds in keratin fibers, and high dissolution concentration needs to be achieved through high temperature and long-term action, and the process is mainly to realize dissolution through thermal degradation of peptide chains of protein molecules. For example: according to the research, the urea/choline chloride eutectic system has certain dissolving capacity on wool, but the dissolving mass fraction is only about 3.3%, and the dissolving rate is less than 85%. Hereafter, Yuanjian et al studied the dissolution of wool using choline thioglycolate eutectic system with reducibility to disulfide bonds, with a maximum dissolution mass fraction of 16% at 120 ℃, but requiring about 800 min. In addition, the irritation of a mercaptoacetic choline eutectic system is strong, and the pollution in the preparation process is serious; recently, researchers prepare an environment-friendly lactic acid/L-cysteine eutectic system, and use the system to dissolve wool and the like, and researches show that the time required for achieving 90% dissolution rate is 3.5 hours, but the total dissolution mass fraction is lower and is only 22mg/g of the eutectic system, L-cysteine cannot effectively promote the dissolution of wool keratin, which is also reflected in researches of Zhang et al, and the introduction of L-cysteine not only causes the synthesis difficulty of DES, but also causes poor dissolution performance. Furthermore, the production costs of such reductive eutectic systems, as typified by choline thioglycolate and lactic acid/L-cysteine, far exceed those of conventional eutectic systems, because: reducing agents such as thioglycolic acid, L-cysteine and the like are high in price, and the reducing agents are used as solvent parts of a eutectic system, so that the use amount of the reducing eutectic system is too large, and the application value of extracting keratin by adopting the reducing eutectic system is not high.
In conclusion, in the field of keratin dissolution, although a conventional non-reducing eutectic system represented by urea/choline chloride shows higher dissolving capacity than that of a reduction C method, the problems that disulfide bonds cannot be effectively destroyed and a reducing agent is difficult to add are still faced, and if a novel dissolution regeneration method can be researched, a high-concentration keratin solution is prepared by the conventional eutectic system, and the method has extremely important practical significance for reducing production cost and preparing high-performance regenerated keratin materials.
Disclosure of Invention
[ problem ] to provide a method for producing a semiconductor device
A non-reducing eutectic system represented by urea/choline chloride can dissolve keratin under high-temperature assisted degradation, but cannot effectively destroy disulfide bonds, so that a high-concentration keratin solution cannot be obtained. And conventional inorganic salt reducing agents cannot be added into the system, and the adoption of mercaptoethanol or mercaptoacetic acid reducing agents has intolerable pungent odor, so that the protection is difficult, and the high-concentration keratin solution cannot be quickly prepared, so that the preparation and the application of the regenerated keratin material are hindered.
Therefore, the technical problems to be solved by the invention are as follows: a process for the preparation of a keratin solution having a keratin concentration of up to 10-50 wt% is provided.
[ technical solution ] A
In order to solve the problems, the invention adopts a reducing agent pre-infiltration strategy, the efficient and environment-friendly disulfide bond reducing agent is infiltrated into the hair fiber in advance through novel pretreatment, after the hair fiber is dried and crushed, the pretreated hair powder containing a large amount of reducing agent can be obtained, and when a non-reducing eutectic system is adopted for dissolution in the follow-up process, the problem that the disulfide bond is difficult to disassemble and the problem that the high-concentration keratin solution is difficult to prepare due to the fact that the reducing agent cannot be added can be solved.
The first purpose of the invention is to provide a method for extracting keratin from keratin fibers, which comprises the steps of pretreating the keratin fibers by using pretreatment liquid, and dissolving by using a eutectic system to obtain a solution of the eutectic system of the keratin; the pretreatment solution comprises 10-100g/L of reducing agent, 0-20g/L of penetrating agent, 0-20g/L of polyethylene glycol (PEG) and 10-500g/L of urea; the reducing agent is tris (3-hydroxypropyl) phosphine, mercaptoethanol, L-cysteine, tris (2-carboxyethyl) phosphine or sodium bisulfite.
In one embodiment of the present invention, preferably, the pretreatment solution comprises 20-100g/L of a reducing agent, 2-20g/L of a penetrant, 5-20g/L of polyethylene glycol and 50-500g/L of urea.
In one embodiment of the invention, the polyethylene glycol has a molecular weight of 200-.
In one embodiment of the present invention, the eutectic system refers to a melt formed by combining a hydrogen bond acceptor and a hydrogen bond donor in a stoichiometric ratio. It is formed by melting certain homogeneous solid mixtures when heated to a particular temperature, which is lower than the melting point of these compounds or elements. Common hydrogen bond donors and acceptors that can compose eutectic systems are as follows: hydrogen bond donor: urea, thiourea, carboxylic acids (phenylacetic acid, malic acid, citric acid, succinic acid, etc.), polyols (ethylene glycol, glycerol, butylene glycol, xylitol, etc.), amino acids, saccharides (glucose, fructose) trifluoroacetamide, etc.; hydrogen bond acceptors: quaternary ammonium salts (such as choline chloride), zwitterions (such as betaine), and the like. The non-reducing eutectic system in the present invention refers to a eutectic system having no reduction property for disulfide bonds, and includes: urea/choline chloride eutectic system, choline chloride/ethylene glycol eutectic system, citric acid/choline chloride eutectic system, and the like.
In one embodiment of the present invention, the pretreatment liquid has a pH of 1 to 12.
In one embodiment of the present invention, keratin fibers are pretreated with the pretreatment liquid described above, followed by mechanical pulverization to screen out particles having a diameter of more than 200 μm, to obtain a pretreated powder.
In an embodiment of the present invention, the pretreatment method comprises: the keratin fiber is soaked in a pretreatment solution at a temperature of-20-60 ℃ for 0.1-24 h, rinsed and dried, and finally the water content of the fiber is controlled to be 2-15%. If the moisture content is too high, the eutectic system will not dissolve the hair.
In one embodiment of the present invention, keratin fibers refer to hair fibers containing keratin as a main component, including human hair, wool, rabbit hair, yak hair, mohair, camel hair, pig hair, chicken hair, duck hair, and goose hair.
In one embodiment of the invention, the pretreatment powder and the eutectic system are dissolved according to the mass ratio of 10-200% (w/w), and a high-concentration keratin eutectic system solution is prepared when the eutectic system presents a uniform and transparent amber color.
In one embodiment of the present invention, the dissolving method is: firstly heating the eutectic system to 70-100 ℃, then adding the pretreatment powder into the solvent according to the mass ratio of 10-200% (w/w), stirring and mixing uniformly, then heating the system to 110-.
In one embodiment of the invention, the mass ratio of the pre-treatment powder to the eutectic system is preferably 15% to 150% w/w.
It is a second object of the present invention to provide a keratin eutectic system solution prepared according to the above method.
In one embodiment of the present invention, the keratin eutectic system solution has a keratin concentration of 10 to 50 wt%.
The third purpose of the invention is to provide the application of the keratin eutectic system solution in spinning, film forming, coating and porous material preparation.
Compared with a conventional water system reduction method, a common eutectic system, a eutectic system/mercaptoethanol composite system or a mercaptoacetic choline reductive eutectic system, the method has the following advantages and effects:
(1) the dissolution mass fraction is high: the invention adopts a reducing agent pre-infiltration strategy, and pre-infiltrates a novel efficient disulfide bond reducing agent, namely tris (3-hydroxypropyl) phosphine, into the hair fibers under the action of urea and a penetrating agent through pretreatment, so that the problem that the reducing agent cannot be added into a eutectic system is solved, and the reducing agent can be uniformly contacted with disulfide bonds in the fibers in advance. When the hair powder treated by the method is dissolved at high temperature in the eutectic system, the problem that the disulfide bonds can not be broken down in the conventional non-reducing eutectic system can be solved, and the dissolving efficiency of the hair powder is greatly improved. And large-particle substances are crushed and screened out, and a homogenizer is used for shearing at high speed to destroy the formation of micelles, so that the dissolution mass fraction of the colloidal substances can reach 50 wt%, which is far beyond the common reduction method (<10 wt%), non-reducing eutectic system (<10 wt%), eutectic system/mercaptoethanol composite system (<16 wt%) or reducing eutectic system (<20 wt%) such as mercaptoacetic acid choline.
(2) The dissolution speed is high, and the degradation degree of keratin is light. The invention permeates the high-efficiency reducing agent into the fiber in advance, and can greatly reduce the dissolving time required by the disassembly of the disulfide bond under the high-temperature condition. When the conventional eutectic system is adopted for dissolving, a step of adding a reducing agent is not needed, so that the time for waiting for the penetration and action of the reducing agent is saved, the dissolving rate can be improved, and the thermal degradation of the protein can be reduced.
(3) The operation is simple, and mass production can be realized: after the hair fibers permeated with the reducing agent are mechanically crushed and screened, fine and smooth pretreatment powder can be obtained, which is beneficial to increasing the permeation of a eutectic system to the fibers, improving the dissolution rate, reducing the problems of filter screen blockage and the like in the subsequent production; in addition, a high-speed refiner is adopted to assist dissolution, and the high-speed shearing action of the cutter head of the refiner can effectively solve the entanglement problem of the swollen hair fibers, so that the dissolution is quicker.
(4) Economic and environment-friendly: the pretreatment liquid is simple and reliable to prepare, has no pungent smell, is simple and convenient to operate in the process of pretreating hair, and meets the requirement of green production.
Detailed Description
The following description of the preferred embodiments of the present invention is provided for the purpose of better illustrating the invention and is not intended to limit the invention thereto.
1. Measurement of dissolution time, dissolution rate and dissolution mass fraction
Taking 1 support, plugging the colorimetric tubes, respectively adding 10gDES, then respectively adding certain mass of hair powder, when the system is dissolved to be in a clear and transparent state, recording the dissolving time, filtering the solution, drying filter residues, and weighing.
The dissolution mass fraction is (mass of hair-mass of residue)/mass of DES 100%;
the dissolution rate is (mass of hair-mass of residue)/mass of hair 100%.
Example 1:
firstly, preparing a pretreatment solution according to the following formula: 20g/L of tris (3-hydroxypropyl) phosphine, 20g/L of penetrant JFC-M20g/L, PEG (Mn is 200), 50g/L of urea, and pH is adjusted to be 4.2. And then, putting the wool fibers into the pretreatment liquid, soaking for 3 hours at 60 ℃, rinsing for 3 times by using tap water at room temperature, centrifugally dewatering, and finally drying to ensure that the water content of the fibers is 5%.
And secondly, mechanically crushing the pretreated wool fibers by using a ball mill, and screening out particles with the diameter of more than 200 mu m to obtain pretreated wool powder.
And finally, heating the urea/choline chloride eutectic system to 100 ℃, adding the pretreated wool powder into the DES according to the mass ratio of 15%, uniformly stirring and mixing, heating the system to 130 ℃, and stirring by adopting a high-speed homogenizer at 10000r/min until the system is completely dissolved.
Tests prove that the time required for completely dissolving the pretreated wool powder is about 45min, the final keratin solution mass fraction is 12.5 wt%, and the dissolution rate is 95.8%.
Compared with the prior art, the untreated wool fibers are dissolved according to the same conditions, most of the fibers are still intact after 12 hours, the dissolution cannot be completed, the keratin mass fraction is only 4.1% after 12 hours, and the dissolution rate is about 28.0%.
Example 2:
firstly, preparing a pretreatment solution according to the following formula: 50g/L of tri (3-hydroxypropyl) phosphine, 10g/L of penetrating agent JFC-M10g/L, PEG (Mn is 400), and 200g/L of urea, wherein the pH value is adjusted to be 2. Then, the chicken feather is placed in the pretreatment liquid, soaked for 24 hours at 20 ℃, rinsed for 3 times by tap water at room temperature, centrifugally dewatered and finally dried, so that the water content of the fiber is 10%.
And secondly, mechanically crushing the pretreated chicken feather by adopting a ball mill, and screening out particles with the diameter of more than 200 mu m to obtain pretreated chicken feather powder.
And finally, heating the choline chloride/ethylene glycol eutectic system to 100 ℃, adding the pretreated chicken feather powder into the solvent according to the mass ratio of 30%, uniformly stirring and mixing, heating the system to 130 ℃, and stirring by adopting a high-speed homogenizer at 5000r/min until the dissolution is finished.
Tests show that the dissolution speed of the pretreated chicken feather powder is obviously improved, the time required for complete dissolution is 300min, the keratin solution mass fraction is 23.0%, and the dissolution rate is 98.2%;
in contrast, when the untreated chicken feathers were dissolved under the above conditions, the addition amount thereof failed to complete the complete dissolution, and the keratin mass fraction was measured to be 5.1 wt% and the dissolution rate was 17% after 12 hours.
Example 3:
firstly, preparing a pretreatment solution according to the following formula: 100g/L of tris (3-hydroxypropyl) phosphine, 5g/L of penetrant JFC-M2 g/L, PEG (Mn is 400), and 100g/L of urea, wherein the pH is adjusted to be 12. Then, the pig hair fiber is placed in the pretreatment liquid, soaked for 24 hours at 60 ℃, rinsed for 3 times by tap water at room temperature, centrifugally dewatered and finally dried, so that the water content of the fiber is 7%.
And secondly, mechanically crushing the pretreated pig hair fibers by using a ball mill, and screening out particles with the diameter of more than 200 mu m to obtain the pretreated pig hair powder.
And finally, dissolving the citric acid/choline chloride eutectic system, heating the eutectic system to 70 ℃, adding the pretreated pig hair powder into the solvent according to the mass ratio of 50%, uniformly stirring and mixing, heating the system to 140 ℃, and stirring the system by using a high-speed homogenizer at 30000r/min until the system is completely dissolved.
Tests show that in a citric acid/choline chloride eutectic system, the dissolution speed of the pretreated pig hair powder is obviously improved, the time required for complete dissolution is 10.5 hours, the mass fraction of the solution is 33.1%, and the dissolution rate is 95.4%;
in contrast, when the untreated pig hair is dissolved according to the above conditions, after 2 hours, stirring is not possible due to swelling and excessive viscosity, and when the dissolution is observed by a microscope, the dissolution is carried out for 24 hours, and a large amount of dissolution is still carried out by the microscope. After 24h, the keratin weight fraction was measured to be 6.2 wt%, and the dissolution rate was about 18.5%.
Example 4:
firstly, preparing a pretreatment solution according to the following formula: 50g/L of tris (3-hydroxypropyl) phosphine, 20g/L of penetrant JFC-M20g/L, PEG (Mn is 200), 500g/L of urea, and pH adjusted to be 4.2. And then, putting the wool fibers into the pretreatment liquid, soaking for 3 hours at 60 ℃, rinsing for 3 times by using tap water at room temperature, centrifugally dewatering, and finally drying to ensure that the moisture content of the fibers is 5%.
And secondly, mechanically crushing the pretreated wool fibers by using a ball mill, and screening out particles with the diameter of more than 200 mu m to obtain pretreated wool powder.
And finally, heating the urea/choline chloride eutectic system to 100 ℃, adding the pretreated wool powder into the DES solvent according to the mass ratio of 105%, uniformly stirring and mixing, heating the system to 140 ℃, and stirring by using a high-speed homogenizer at 30000r/min until the system is completely dissolved.
Tests show that in a urea/choline chloride eutectic system, the complete dissolution time of the wool powder after the pretreatment is 5.5 hours, the final keratin solution mass fraction is 50.2 wt%, and the dissolution rate is 98.0%.
In contrast, when untreated wool was dissolved under the same conditions, the amount of the solution added was not completely dissolved after 12 hours, and at this time, the keratin mass fraction was only 3.5% and the dissolution rate was about 6.8%.
Example 5:
firstly, preparing a pretreatment solution according to the following formula: 100g/L of tris (3-hydroxypropyl) phosphine, 20g/L of penetrant JFC-M20g/L, PEG (Mn is 200), 500g/L of urea, and the pH is adjusted to be 12. And then, putting the wool fibers into the pretreatment liquid, soaking for 3 hours at 60 ℃, rinsing for 3 times by using tap water at room temperature, centrifugally dewatering, and finally drying to ensure that the moisture content of the fibers is 5%.
And secondly, mechanically crushing the pretreated wool fibers by using a ball mill, and screening out particles with the diameter of more than 200 mu m to obtain pretreated wool powder.
And finally, heating the urea/choline chloride eutectic system to 100 ℃, adding the pretreated wool powder into the DES solvent according to the mass ratio of 15%, uniformly stirring and mixing, heating the system to 120 ℃, and stirring by adopting a high-speed homogenizer at 10000r/min until the system is completely dissolved.
Tests show that in a urea/choline chloride eutectic system, the wool powder after the pretreatment is completely dissolved for 30min, the final keratin solution mass fraction is 13.0 wt%, and the dissolution rate is 98.5%.
Compared with the prior art, the untreated wool fibers are dissolved according to the same conditions, most of the fibers are still intact after 12 hours, the dissolution cannot be completed, the keratin mass fraction is only 4.1% after 12 hours, and the dissolution rate is about 28.0%.
Example 6:
firstly, preparing a pretreatment solution according to the following formula: 100g/L of tris (3-hydroxypropyl) phosphine, 20g/L of penetrant JFC-M20g/L, PEG (Mn is 200), 500g/L of urea, and pH value is adjusted to be 4.2. Then, the wool fibers are placed in the pretreatment liquid, soaked for 3 hours at the temperature of minus 20 ℃, rinsed for 3 times by tap water at room temperature and centrifugally dewatered, and finally dried to enable the moisture content of the fibers to be 5%.
And secondly, mechanically crushing the pretreated wool fibers by using a ball mill, and screening out particles with the diameter of more than 200 mu m to obtain pretreated wool powder.
And finally, heating the urea/choline chloride eutectic system to 100 ℃, adding the pretreated wool powder into the DES solvent according to the mass ratio of 15%, uniformly stirring and mixing, heating the system to 120 ℃, and stirring by adopting a high-speed homogenizer at 10000r/min until the system is completely dissolved.
Tests show that in a urea/choline chloride eutectic system, the complete dissolution time of the wool powder after the pretreatment is 60min, the final keratin solution mass fraction is 11.2 wt%, and the dissolution rate is 85.9%.
Compared with the prior art, the untreated wool fibers are dissolved according to the same conditions, most of the fibers are still intact after 12 hours, the dissolution cannot be completed, the keratin mass fraction is only 4.1% after 12 hours, and the dissolution rate is about 28.0%.
Example 7: application of keratin eutectic system solution
Firstly, preparing a pretreatment solution according to the following formula: 100g/L of tris (3-hydroxypropyl) phosphine, 20g/L of penetrant JFC-M20g/L, PEG (Mn is 200), 500g/L of urea, and pH value is adjusted to be 4.2. And then, putting the wool fibers into the pretreatment liquid, soaking for 3 hours at 60 ℃, rinsing for 3 times by using tap water at room temperature, centrifugally dewatering, and finally drying to ensure that the water content of the fibers is 5%.
And secondly, mechanically crushing the pretreated wool fibers by using a ball mill, and screening out particles with the diameter of more than 200 mu m to obtain pretreated wool powder.
And finally, heating the urea/choline chloride eutectic system to 100 ℃, adding the pretreated wool powder into the DES according to the mass ratio of 15%, uniformly stirring and mixing, heating the system to 120 ℃, and stirring at 10000r/min by using a high-speed homogenizer until the system is completely dissolved.
Defoaming and filtering the solution of the keratin eutectic system, controlling the length of an air gap by a metering pump and a spinneret plate by adopting a dry-jet wet spinning process, finally, carrying out solidification forming in urea aqueous solution, stretching, washing with water, drying and forming fibers to obtain the keratin fibers, wherein the strength of the fibers is about 0.5 cN/dT.
Example 8: application of keratin eutectic system solution
Firstly, preparing a pretreatment solution according to the following formula: 100g/L of tris (3-hydroxypropyl) phosphine, 20g/L of penetrant JFC-M20g/L, PEG (Mn is 200), 500g/L of urea, and pH value is adjusted to be 4.2. And then, putting the wool fibers into the pretreatment liquid, soaking for 3 hours at 60 ℃, rinsing for 3 times by using tap water at room temperature, centrifugally dewatering, and finally drying to ensure that the water content of the fibers is 5%.
And secondly, mechanically crushing the pretreated wool fibers by using a ball mill, and screening out particles with the diameter of more than 200 mu m to obtain pretreated wool powder.
And finally, heating the urea/choline chloride eutectic system to 100 ℃, adding the pretreated wool powder into the DES according to the mass ratio of 15%, uniformly stirring and mixing, heating the system to 120 ℃, and stirring at 10000r/min by using a high-speed homogenizer until the system is completely dissolved.
And (2) defoaming and filtering the keratin eutectic system solution, forming a film by adopting a tape casting method, taking water as a coagulating bath, and precipitating urea and choline chloride to obtain a transparent hard keratin film.
Comparative example 1:
wool was treated according to the method of example 1, except that the order of treatment of the reducing system and the eutectic solvent system was changed.
The specific implementation is as follows: firstly, heating a urea/choline chloride eutectic system to 100 ℃, adding wool fibers into the DES according to the mass ratio of 15%, uniformly stirring and mixing, heating the system to 130 ℃, stirring by adopting a high-speed homogenizer at 10000r/min, and treating for 45 min.
And secondly, mechanically crushing the pretreated wool fibers by using a ball mill, and screening out particles with the diameter of more than 200 mu m to obtain pretreated wool powder.
Finally, a dissolving solution is prepared according to the following formula: 20g/L of L-cysteine, 20g/L of penetrant JFC-M20g/L, PEG (Mn is 200), 50g/L of urea, and pH value is adjusted to be 4.2. Then, the pretreated powder was placed in the above-mentioned solution and immersed at 60 ℃ for 3 hours.
The other conditions were the same as in example 1. The results show that the wool dissolution rate is reduced to 21.2% after the treatment sequence is replaced by the L-cysteine instead of the tris (3-hydroxypropyl) phosphine, and the mass fraction of the prepared keratin aqueous solution is only 2.5%, which indicates that the treatment sequence of the reduction system and the eutectic solvent system is particularly critical.
Comparative example 2:
the pretreatment liquid was prepared with reference to the method of example 1, except that: tris (3-hydroxypropyl) phosphine was replaced with L-cysteine, mercaptoethanol, sodium sulfide, tris (2-carboxyethyl) phosphine or sodium bisulfite, and the other conditions were the same as in example 1. The results show that both the dissolution rate and the mass fraction of the prepared solution are reduced. This shows that the reduction system adopted by the invention has better treatment effect and is helpful for promoting the dissolution of keratin.
TABLE 1
Although the present invention has been described with reference to the preferred embodiments, it should be understood that various changes and modifications can be made therein by those skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (10)
1. A method for extracting keratin from keratin fiber is characterized in that the method comprises the steps of pretreating the keratin fiber by using pretreatment liquid, and dissolving by using a eutectic system to obtain a solution of the eutectic system of the keratin; the pretreatment solution comprises 10-100g/L of reducing agent, 0-20g/L of penetrating agent, 0-20g/L of polyethylene glycol and 10-500g/L of urea; the reducing agent is tris (3-hydroxypropyl) phosphine, mercaptoethanol, L-cysteine, tris (2-carboxyethyl) phosphine or sodium bisulfite.
2. The method of claim 1, wherein the pretreatment solution has a pH of 1 to 12.
3. A method according to claim 1 or 2, characterized in that the keratin fibres are pretreated with a pretreatment liquid, and thereafter mechanically crushed to screen out particles having a diameter of more than 200 μm, to obtain a pretreated powder.
4. The method according to any one of claims 1 to 3, wherein the pre-treatment method is: the keratin fiber is soaked in a pretreatment solution at a temperature of-20-60 ℃ for 0.1-24 h, rinsed and dried, and finally the water content of the fiber is controlled to be 2-15%.
5. The method according to any one of claims 1 to 4, wherein the keratin fiber is hair fiber containing keratin as main component, and comprises human hair, wool, rabbit hair, yak hair, mohair, camel hair, pig hair, chicken hair, duck hair, and goose hair.
6. The method as claimed in any one of claims 1 to 5, wherein the dissolving is carried out by dissolving the pretreatment powder with the eutectic system according to the mass ratio of 10% to 200%, and when the eutectic system presents a uniform and transparent amber color, a high-concentration keratin eutectic system solution is prepared.
7. The method according to any one of claims 1 to 6, wherein the dissolution method is: firstly heating the eutectic system to 70-100 ℃, then adding the pretreatment powder into the eutectic system according to the mass ratio of 10% -200%, stirring and mixing uniformly, then heating the system to 110-140 ℃, and stirring until the system is dissolved uniformly.
8. A keratin eutectic system solution prepared according to the method of any one of claims 1 to 7.
9. The keratin eutectic system solution of claim 8, wherein the keratin eutectic system solution has a keratin concentration of 10-50 wt%.
10. Use of the keratin eutectic system solution of claim 9 for spinning, film forming, coating and porous material preparation.
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