CN113638227B - Antistatic cashmere product and preparation method thereof - Google Patents

Antistatic cashmere product and preparation method thereof Download PDF

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Publication number
CN113638227B
CN113638227B CN202111049706.3A CN202111049706A CN113638227B CN 113638227 B CN113638227 B CN 113638227B CN 202111049706 A CN202111049706 A CN 202111049706A CN 113638227 B CN113638227 B CN 113638227B
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cashmere
fiber
grafted
conductive
cashmere fiber
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CN113638227A (en
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陈慧
薛惊理
赵振
金国标
薛正利
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Jiangnan Zhizaofu Ningbo Thread Industry Co ltd
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Jiangnan Zhizaofu Ningbo Thread Industry Co ltd
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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
    • D06M14/00—Graft polymerisation of monomers containing carbon-to-carbon unsaturated bonds on to fibres, threads, yarns, fabrics, or fibrous goods made from such materials
    • D06M14/02—Graft polymerisation of monomers containing carbon-to-carbon unsaturated bonds on to fibres, threads, yarns, fabrics, or fibrous goods made from such materials on to materials of natural origin
    • D06M14/06—Graft polymerisation of monomers containing carbon-to-carbon unsaturated bonds on to fibres, threads, yarns, fabrics, or fibrous goods made from such materials on to materials of natural origin of animal origin, e.g. wool or silk
    • A—HUMAN NECESSITIES
    • A41—WEARING APPAREL
    • A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
    • A41D1/00—Garments
    • A41D1/04—Vests, jerseys, sweaters or the like
    • A—HUMAN NECESSITIES
    • A41—WEARING APPAREL
    • A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
    • A41D31/00—Materials specially adapted for outerwear
    • A41D31/04—Materials specially adapted for outerwear characterised by special function or use
    • A41D31/26—Electrically protective, e.g. preventing static electricity or electric shock
    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
    • D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
    • D02G3/02—Yarns or threads characterised by the material or by the materials from which they are made
    • D02G3/04—Blended or other yarns or threads containing components made from different materials
    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
    • D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
    • D02G3/44—Yarns or threads characterised by the purpose for which they are designed
    • D02G3/441—Yarns or threads with antistatic, conductive or radiation-shielding properties
    • 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
    • D06M13/248—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 sulfur
    • D06M13/262—Sulfated compounds thiosulfates
    • 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
    • D06M13/35—Heterocyclic compounds
    • D06M13/355—Heterocyclic compounds having six-membered heterocyclic rings
    • 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
    • D06M13/368—Hydroxyalkylamines; Derivatives thereof, e.g. Kritchevsky bases
    • 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
    • D06M13/46—Compounds containing quaternary nitrogen atoms
    • D06M13/463—Compounds containing quaternary nitrogen atoms derived from monoamines
    • 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
    • D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
    • D06M15/01—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with natural macromolecular compounds or derivatives thereof
    • D06M15/03—Polysaccharides or derivatives thereof
    • 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
    • D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
    • D06M15/01—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with natural macromolecular compounds or derivatives thereof
    • D06M15/03—Polysaccharides or derivatives thereof
    • D06M15/13—Alginic acid or derivatives thereof
    • 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
    • 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
    • D—TEXTILES; PAPER
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    • 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
    • D06M15/564—Polyureas, polyurethanes or other polymers having ureide or urethane links; Precondensation products forming them
    • D06M15/572—Reaction products of isocyanates with polyesters or polyesteramides
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
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    • D06M2101/00—Chemical constitution of the fibres, threads, yarns, fabrics or fibrous goods made from such materials, to be treated
    • D06M2101/02—Natural fibres, other than mineral fibres
    • D06M2101/10—Animal fibres
    • D06M2101/12—Keratin fibres or silk
    • D—TEXTILES; PAPER
    • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B2101/00—Inorganic fibres
    • D10B2101/10—Inorganic fibres based on non-oxides other than metals
    • D10B2101/12—Carbon; Pitch
    • D—TEXTILES; PAPER
    • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B2211/00—Protein-based fibres, e.g. animal fibres
    • D10B2211/01—Natural animal fibres, e.g. keratin fibres
    • D10B2211/02—Wool
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
    • Y02P70/62—Manufacturing or production processes characterised by the final manufactured product related technologies for production or treatment of textile or flexible materials or products thereof, including footwear

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Zoology (AREA)
  • Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)

Abstract

The invention discloses an antistatic cashmere product and a preparation method thereof, which belong to the textile field, in particular to a preparation method of grafted cashmere fibers, wherein the cashmere fibers are pretreated in a penetrating agent solution, and the penetrating agent solution contains fatty alcohol polyoxyethylene ether and N-ethyl glucosamine; adding the pretreated cashmere fiber into an acrylonitrile solution, and then carrying out a reaction to obtain a grafted cashmere fiber; and further finishing to obtain functional cashmere fibers, and obtaining conductive cashmere yarns with the conductive carbon fibers through a spinning process. The electric cashmere yarn obtained by the invention can be further woven to obtain cashmere woven fabrics with good antistatic performance.

Description

Antistatic cashmere product and preparation method thereof
Technical Field
The invention belongs to the field of textiles, and particularly relates to an antistatic cashmere product and a preparation method thereof.
Background
With the rapid development of technology, the electric appliances such as computers and mobile phones are rapidly popularized, and electromagnetic radiation interference in the human living environment is increasingly serious. In autumn and winter suitable for wearing cashmere clothes, the opportunity of charging is increased due to the fact that weather is dry and floating dust particles in the air are added, and people are made to be interfered by static electricity. Long-term electrostatic interference and invasion can influence the physical and mental health of people, so that people can react with dysphoria, headache, chest distress, cough and the like; short-term electrostatic interference and invasion can also cause irritation to human skin, cause skin itch, and seriously cause bronchial asthma, arrhythmia and the like. Therefore, the safety hazard caused by static electricity is increasingly attracting attention. Since the industrialization of chemical fiber polymers is started, the work of improving the conductivity of chemical fibers and preparing conductive fibers is started, and various conductive fibers are now available.
Cashmere fiber is a natural protein polymer fiber, consists of various amino acids, and is one of the most complex fibers used so far. It is different from cashmere and goat wool, especially a natural fiber produced from the root of cashmere goat skin, belongs to rare special animal wool fiber, and the total animal fiber content is only 0.2%. Cashmere fibers have the reputation of "soft gold", "fiber precious stone", and the like.
The excellent characteristics of the cashmere fiber endow the cashmere products with the advantages of softness, warmth retention, ventilation and the like, and simultaneously have good hygroscopicity and rebound resilience, so that the cashmere fiber is favored by consumers. However, the cashmere fiber structure is special, so that the cashmere fabric can have some troubles in the wearing and washing processes, such as easy pilling, influence on the beauty, unstable size caused by retraction, and the like. In addition, the cashmere fiber has larger resistivity and poorer conductivity, so that the cashmere garment is easy to generate static phenomenon in the wearing process, and therefore, the cashmere garment cannot be worn in some special occasions with strict static requirements, and the application range of the cashmere product is limited to a great extent.
Disclosure of Invention
The invention aims to provide a preparation method of grafted cashmere fiber with good grafting rate.
The technical scheme adopted by the invention for achieving the purpose is as follows:
a method for preparing grafted cashmere fiber, comprising:
pretreating cashmere fibers in a penetrating agent solution, wherein the penetrating agent solution contains fatty alcohol polyoxyethylene ether and N-ethyl glucosamine;
and (3) putting the pretreated cashmere fibers into an acrylonitrile solution, adding an initiator solution, and then performing a downward reaction to obtain grafted cashmere fibers.
Preferably, the initiator is potassium persulfate.
Preferably, the acrylonitrile content of the acrylonitrile solution is 45-55wt%.
Preferably, in the cashmere fiber grafting, the cashmere fiber is washed by cold water, dried, then immersed in a penetrating agent solution, treated for 20-60min at the temperature of 30-50 ℃, taken out, the pretreated cashmere is added into an acrylonitrile solution at the temperature of 20-30 ℃, an initiator is added at the temperature of 70-90 ℃, and after 0.5-2h of reaction, the grafted cashmere fiber is obtained by cold water washing, soaping, cold water washing and drying.
More preferably, the osmotic agent solution contains 6-15wt% of fatty alcohol polyoxyethylene ether.
More preferably, the osmotic agent solution contains 0.3 to 1.8wt% N-ethyl glucosamine.
The flake layer of the cashmere fiber is divided into a surface layer, an outer layer and an inner layer. Wherein the outer layer mainly comprises long-chain fatty acids, serine, cystine and other amino acids, and is of an ester-like structure. The existence of the ester-like structures is also a main cause of high resistance of cashmere fibers and easy generation of static electricity. The inside of the scale layer is a leather layer. The cortical layer comprises microfibrillar crystalline units consisting of basal fibrils, which are intercalated into an amorphous matrix, thus collectively constituting the cortical layer. The base fibrils are in an alpha-helical structure, so that the main component is low-sulfur protein; the matrix has no alpha-helix structure, and is rich in cystine besides some low-sulfur proteins, and the cystine is rich in disulfide bonds to form high-sulfur proteins. Forces such as cystine disulfide bonds, hydrogen bonds and the like existing in the cortical layer and other covalent bonds, ionic bonds and the like form the main chemical forces for connecting cashmere keratin together. The fatty alcohol polyoxyethylene ether and the N-ethyl glucosamine in the penetrating agent solution act on the cashmere fiber together, so that the large-scale damage of the structure of the cashmere fiber can be avoided, the grafting rate of the cashmere fiber is improved, the mechanical property of the cashmere fiber is improved, the breaking strength is improved, the breaking elongation is reduced to some extent, and after the penetrating agent solution containing the fatty alcohol polyoxyethylene ether and the N-ethyl glucosamine is pretreated, the antistatic performance of the knitted fabric finally obtained by the cashmere fiber is improved through a series of working procedures.
More preferably, the acrylonitrile content of the acrylonitrile solution is 45 to 55wt%.
More preferably, the pretreated cashmere is added in an amount of 5-15wt% of the acrylonitrile solution.
More preferably, the initiator is potassium persulfate.
More preferably, the initiator is added in an amount of 1 to 5wt% of the acrylonitrile solution.
The invention discloses a grafted cashmere fiber prepared by the method.
The invention aims to provide functional cashmere fiber which has good mechanical property and can be used for preparing conductive cashmere yarns.
The technical scheme adopted by the invention for achieving the purpose is as follows:
a functional cashmere fiber, comprising: the grafted cashmere fiber is obtained by finishing the grafted cashmere fiber in a functional solution.
Preferably, the functional solution contains chitosan, polyurethane emulsion, lauryl betaine, sodium alginate and sodium dodecyl sulfate.
More preferably, in the preparation of the polyurethane emulsion, the polyester polyol is vacuumized and dehydrated for 1-3 hours, diisocyanate is then added, the prepolymer solution is obtained by the prepolymerization reaction for 1-5 hours at the temperature of 80-90 ℃, the chain extender solution is added, the chain extension reaction is carried out for 0.5-3 hours at the temperature of 45-55 ℃, the modifying reagent is added at the temperature of 0-5 ℃ for 2-6 hours, the neutralizing reagent is added at the temperature of 20-40 ℃, and the polyurethane emulsion is obtained after stirring for 10-60 minutes.
Still more preferably, the diisocyanate and the polyester polyol are metered in such that the R value is from 1.2 to 2.
Still more preferably, the chain extender solution is obtained by dissolving DMPA in NMP, the DMPA content of the chain extender solution being 25-35wt%.
Still more preferably, the amount of chain extender used is determined by the chain extender, the chain extender being 1.
Still more preferably, the modifying agent is AEAPS and the modifying agent is added dropwise.
Still more preferably, the modifying agent is added in an amount of 20 to 30wt% of the polyurethane prepolymer solution.
Still more preferably, the neutralizing agent is TEA and the neutralizing agent is added in an amount of 2 to 6wt%.
Preferably, in the preparation of the functional finishing liquid, chitosan, polyurethane emulsion, lauryl betaine, sodium alginate and sodium dodecyl sulfate are mixed with deionized water, and the functional finishing liquid is obtained after uniform mixing.
More preferably, the chitosan is added in an amount of 0.3 to 2.1wt% of deionized water.
More preferably, the polyurethane emulsion is added in an amount of 0.5 to 2.5wt% of deionized water.
More preferably, the lauryl betaine is added in an amount of 0.3 to 1.2wt% of deionized water.
More preferably, the sodium alginate is added in an amount of 0.5 to 1.5wt% of deionized water.
More preferably, the sodium lauryl sulfate is added in an amount of 0.4 to 1.2wt% of deionized water.
Preferably, ethyl (3-hydroxy-2-oxo-2H-pyrazin-1-yl) -acetate may be added to the functional finishing liquor. The addition amount of the (3-hydroxy-2-oxo-2H-pyrazin-1-yl) -acetic acid ethyl ester is 0.2 to 1.2 weight percent of deionized water. The use of the (3-hydroxy-2-oxo-2H-pyrazin-1-yl) -ethyl acetate in the functional liquid can improve the finishing effect of the finishing liquid after finishing the cashmere fiber by compounding the finishing liquid, has no influence on the mechanical properties of the functional cashmere fiber, and can further improve the antistatic property of the cashmere knitted fabric obtained by processing and knitting.
Preferably, in the functional finishing, the cashmere fiber is immersed in the functional finishing liquid for 1-6 hours at the temperature of 20-40 ℃, and the functional cashmere fiber is obtained after pre-drying, baking, washing and drying.
A conductive cashmere yarn, comprising: the functional cashmere fiber is obtained by spinning the functional cashmere fiber and the conductive carbon fiber.
Preferably, the content of the conductive carbon fiber in the conductive cashmere yarn is 6-14wt%.
Preferably, in the preparation of the conductive cashmere yarn, the conductive cashmere yarn is obtained by spinning the functional cashmere fiber and the conductive carbon fiber. The content of the conductive carbon fiber in the cashmere yarn is 6-14wt%.
The invention discloses application of the conductive cashmere yarn in antistatic cashmere products.
According to the invention, the grafted cashmere fiber is obtained by grafting after the cashmere fiber is pretreated, and the functional finishing liquid is used for finishing the grafted cashmere fiber to obtain the functional cashmere fiber, and the conductive cashmere yarn is obtained after spinning with the conductive carbon fiber, so that the functional finishing liquid has the following beneficial effects: the grafted cashmere fiber obtained by the invention has good grafting effect and the grafting rate is 38-44%; the mechanical property of the functional cashmere fiber is good, the breaking strength is 0.5-0.62 cN/dtex, and the breaking elongation is reduced to some extent; the cashmere braided fabric obtained by braiding the conductive cashmere fibers has good antistatic performance, and the half life period of static voltage is less than 10s and more than 3 s. Therefore, the invention is an antistatic cashmere product with good mechanical property and antistatic property and a preparation method thereof.
Drawings
FIG. 1 is a graph of the grafting yield of grafted cashmere fibers;
FIG. 2 is a graph of breaking strength of functionalized cashmere fibers;
FIG. 3 is a graph of elongation at break of functionalized cashmere fibers;
fig. 4 is a graph of static voltage half life of cashmere braid.
Detailed Description
The technical scheme of the invention is further described in detail below with reference to the specific embodiments and the attached drawings:
example 1:
a preparation method of functional cashmere fiber,
grafting cashmere fibers: washing cashmere fiber with cold water, drying, immersing in penetrating agent solution, treating at 40 ℃ for 40min, taking out, adding pretreated cashmere into acrylonitrile solution at 30 ℃, adding initiator at 80 ℃, reacting for 1h, washing with cold water, soaping, washing with cold water, and drying to obtain grafted cashmere fiber. The penetrant solution contains 9wt% of fatty alcohol polyoxyethylene ether, the penetrant solution contains 0.6wt% of N-ethyl glucosamine, the content of acrylonitrile in the acrylonitrile solution is 50wt%, the addition amount of pretreated cashmere is 10wt% of the acrylonitrile solution, the initiator is potassium persulfate, and the addition amount of the initiator is 3wt% of the acrylonitrile solution.
Preparing polyurethane emulsion: vacuum-pumping and dehydrating the polyester polyol for 2 hours, adding diisocyanate, carrying out prepolymerization reaction at 90 ℃ for 3 hours to obtain polyurethane prepolymer solution, adding chain extender solution, carrying out chain extension reaction at 50 ℃ for 1 hour, cooling to 5 ℃ and adding a modifying reagent, carrying out reaction for 3 hours, adding a neutralizing reagent at 30 ℃, and stirring for 40 minutes to obtain polyurethane emulsion. The diisocyanate and the polyester polyol are metered and added according to the R value of 1.6, the chain extender solution is obtained by dissolving DMPA in NMP, the content of the DMPA in the chain extender solution is 30wt%, the usage amount of the chain extender is determined by the chain extender coefficient, and the chain extender coefficient is 1; the modifying reagent is AEAPS, the adding mode of the modifying reagent is dripping, the adding amount of the modifying reagent is 24wt% of the polyurethane prepolymer solution, the neutralizing reagent is TEA, and the adding amount of the neutralizing reagent is 4wt%.
Functional finishing liquid preparation: and mixing chitosan, polyurethane emulsion, lauryl betaine, sodium alginate and sodium dodecyl sulfate with deionized water, and uniformly mixing to obtain the functional finishing liquid. The addition amount of chitosan is 1.6wt% of deionized water, the addition amount of polyurethane emulsion is 1.2wt% of deionized water, the addition amount of lauryl betaine is 0.8wt% of deionized water, the addition amount of sodium alginate is 1wt% of deionized water, and the addition amount of sodium dodecyl sulfate is 0.9wt% of deionized water.
And (3) functional finishing: immersing the cashmere fiber in the functional finishing liquid for 3 hours at the temperature of 30 ℃, washing with water, and drying to obtain the functional cashmere fiber.
Example 2:
this example differs from example 1 only in that the penetrant solution contains 1.1wt% of N-ethyl glucosamine in the cashmere fiber grafting.
Example 3:
this example differs from example 1 only in that the penetrant solution contains 1.5wt% of N-ethyl glucosamine in the cashmere fiber grafts.
Example 4:
a preparation method of functional cashmere fiber,
grafting cashmere fibers: washing cashmere fiber with cold water, drying, immersing in penetrating agent solution, treating at 40 ℃ for 40min, taking out, adding pretreated cashmere into acrylonitrile solution at 30 ℃, adding initiator at 80 ℃, reacting for 1h, washing with cold water, soaping, washing with cold water, and drying to obtain grafted cashmere fiber. The penetrant solution contains 9wt% of fatty alcohol polyoxyethylene ether, the penetrant solution contains 1.5wt% of N-ethyl glucosamine, the content of acrylonitrile in the acrylonitrile solution is 50wt%, the addition amount of pretreated cashmere is 10wt% of the acrylonitrile solution, the initiator is potassium persulfate, and the addition amount of the initiator is 3wt% of the acrylonitrile solution.
Preparing polyurethane emulsion: vacuum-pumping and dehydrating the polyester polyol for 2 hours, adding diisocyanate, carrying out prepolymerization reaction at 90 ℃ for 3 hours to obtain polyurethane prepolymer solution, adding chain extender solution, carrying out chain extension reaction at 50 ℃ for 1 hour, cooling to 5 ℃ and adding a modifying reagent, carrying out reaction for 3 hours, adding a neutralizing reagent at 30 ℃, and stirring for 40 minutes to obtain polyurethane emulsion. The diisocyanate and the polyester polyol are metered and added according to the R value of 1.6, the chain extender solution is obtained by dissolving DMPA in NMP, the content of the DMPA in the chain extender solution is 30wt%, the usage amount of the chain extender is determined by the chain extender coefficient, and the chain extender coefficient is 1; the modifying reagent is AEAPS, the adding mode of the modifying reagent is dripping, the adding amount of the modifying reagent is 24wt% of the polyurethane prepolymer solution, the neutralizing reagent is TEA, and the adding amount of the neutralizing reagent is 4wt%.
Functional finishing liquid preparation: mixing chitosan, polyurethane emulsion, lauryl betaine, sodium alginate, sodium dodecyl sulfate, (3-hydroxy-2-oxo-2H-pyrazin-1-yl) -ethyl acetate and deionized water, and uniformly mixing to obtain the functional finishing liquid. The addition amount of chitosan is 1.6wt% of deionized water, the addition amount of polyurethane emulsion is 1.2wt% of deionized water, the addition amount of lauryl betaine is 0.8wt% of deionized water, the addition amount of sodium alginate is 1wt% of deionized water, the addition amount of sodium dodecyl sulfate is 0.9wt% of deionized water, and the addition amount of (3-hydroxy-2-oxo-2H-pyrazin-1-yl) -ethyl acetate is 0.5wt% of deionized water.
And (3) functional finishing: immersing the cashmere fiber in the functional finishing liquid for 3 hours at the temperature of 30 ℃, washing with water, and drying to obtain the functional cashmere fiber.
Example 5:
this example differs from example 4 only in that the amount of (3-hydroxy-2-oxo-2H-pyrazin-1-yl) -acetic acid ethyl ester added in the functional finishing liquor formulation was 0.9wt% of deionized water.
Example 6:
a preparation method of conductive cashmere yarn comprises the following steps:
and spinning the functional cashmere fiber and the conductive carbon fiber to obtain the cashmere yarn. The content of the conductive carbon fiber in the cashmere yarn is 10 weight percent. The length of the conductive fiber is the same as that of the cashmere fiber. The functionalized cashmere fiber of this example is from example 1.
Spinning technology: mixing, carding, spinning, spooling, doubling and double twisting.
The hair-mixing auxiliary agent is as follows: and crude oil FX-906, antistatic agent FX-AS301, and crude oil compounding ratio and on-machine moisture regain requirements are shown in Table 1.
Table 1 and essential oil ratio and on-machine moisture regain requirement
In the spinning process, the mixing of raw materials and oil-water are key steps, and the steps are completed in the wool mixing process. Firstly mixing cashmere raw materials, firstly layering and beating cashmere fibers for 2 times, adding oil and water, beating for 1 time, and conventionally stuffiness for more than 8 hours; and adding the conductive fibers which are independently opened before feeding the machine, and mixing the conductive fibers with the cashmere fiber layering which is added with the oil water for 2-3 times according to the condition, so that the conductive fibers and the cashmere fibers are fully and uniformly mixed. And controlling the upper machine moisture regain to be between 21 and 23 percent.
The carding process is the most critical process in the whole spinning process. In order to achieve better carding of the fibers, and simultaneously, the damage of the fibers is reduced. The appropriate spacing between the cylinders and the work rolls is selected as shown in table 2 and the speed ratio between the rolls is shown in table 3.
TABLE 2 gauge between cylinder and work rolls and doffer
Gauge/mm Section A cylinder B section cylinder C section cylinder D section cylinder
Working roll 0.5~0.6 0.35~0.5 0.3~0.4 0.25~0.3
Doffer 0.45 0.3 0.25 0.2
TABLE 3 speed ratio between cylinder and work roll and doffer
Speed ratio Section A cylinder B section cylinder C section cylinder D section cylinder
Working roll 188/2.5 360/2.5 360/2.5 390/2.5
Doffer 360/17 360/21 390/21
At the same time, comb Mao Cusha is weighted: 0.77g/15m; strip speed: 20m/min: wool feeding amount: 330g; wool feeding period: 70s.
Spinning: setting a spinning count: 2/26Nm spun yarn draft is controlled to be about 1.3 times; twist level: 480T/M; twisting: z twisting; ingot speed: 6500 to 7000rpm.
And (3) a winding process: tension voltages 6v,3v,0v; the clearer parameters are shown in table 4:
TABLE 4 parameters of spooler
And (3) doubling: the speed of the vehicle is 600m/min, and the fixed length is 13200m.
And (3) double twisting: double yarn twist: 240T/M; twisting: s twisting; vehicle speed: 6800rpm.
Example 7:
a preparation method of conductive cashmere yarn comprises the following steps:
this example differs from example 6 only in the functionalized cashmere fibres.
The functionalized cashmere fiber of this example is from example 2.
Example 8:
a preparation method of conductive cashmere yarn comprises the following steps:
this example differs from example 6 only in the functionalized cashmere fibres.
The functionalized cashmere fiber of this example comes from example 3.
Example 9:
a preparation method of conductive cashmere yarn comprises the following steps:
this example differs from example 6 only in the functionalized cashmere fibres.
The functionalized cashmere fiber of this example is from example 4.
Example 10:
a preparation method of conductive cashmere yarn comprises the following steps:
this example differs from example 6 only in the functionalized cashmere fibres.
The functionalized cashmere fiber of this example comes from example 5.
Comparative example 1:
this comparative example differs from example 3 only in that N-ethyl glucosamine was not added to the penetrant solution in the cashmere fiber grafting.
Comparative example 2:
this comparative example differs from example 8 only in that N-ethyl glucosamine is not added to the penetrant solution in the cashmere fiber grafting step in the preparation method of the functionalized cashmere fiber.
Test example 1:
1. grafting ratio test
Test sample: the grafted cashmere fibers prepared in examples 1-3 and comparative example 1.
The testing method comprises the following steps: the weight before grafting, and the weight after grafting were weighed in each of the above examples and comparative examples.
The grafting ratio is calculated according to the following formula:
grafting = (weight after grafting-weight before grafting)/weight before grafting x 100%.
The test result of the grafting rate of the grafted cashmere fiber obtained by the method is shown in figure 1, wherein the grafting rate of the grafted cashmere fiber obtained by the method in example 3 is 42.61%, the grafting rate of the grafted cashmere fiber obtained by the method in comparative example 1 is 36.23%, and the method in example 3 is compared with the method in comparative example 1, and shows that the grafting rate of the grafted cashmere fiber is obviously improved after the cashmere fiber is soaked in a penetrating agent containing N-ethyl glucosamine for pretreatment before the cashmere fiber is grafted; the graft ratio of the grafted cashmere fiber prepared in example 1 was 41.17%, the graft ratio of the grafted cashmere fiber prepared in example 2 was 41.94%, and compared with examples 1-2, it was shown that the graft ratio of the grafted cashmere fiber was increased with the increase of the amount of N-ethyl glucosamine, but the increase was not obvious.
The grafting rate of the grafted cashmere fiber obtained by the invention is 38-44%.
2. Mechanical property test
Test sample: the functionalized cashmere fibers prepared in examples 1-5 and comparative example 1.
The testing method comprises the following steps: the tensile properties of the above test samples were measured using an electronic single fiber power machine.
Test conditions: the pre-tension is 0.1cN, the clamping distance is 10mm, the stretching speed is 20mm/min, and the number of the test roots is 10.
The test result of the breaking strength of the functional cashmere fiber prepared by the invention is shown in fig. 2, wherein the breaking strength of the grafted cashmere fiber prepared by the embodiment 3 is 0.55cN/dtex, the breaking strength of the grafted cashmere fiber prepared by the comparative embodiment 1 is 0.43 cN/dtex, and the embodiment 3 is compared with the comparative embodiment 1, which shows that the breaking strength of the grafted cashmere fiber obtained by immersing the cashmere fiber in a penetrating agent containing N-ethyl glucosamine before grafting the cashmere fiber is obviously improved; the breaking strength of the grafted cashmere fiber prepared in the example 1 is 0.54 cN/dtex, the breaking strength of the grafted cashmere fiber prepared in the example 2 is 0.57 cN/dtex, and compared with the examples 1-2, the breaking strength of the grafted cashmere fiber is improved along with the increase of the using amount of N-ethyl glucosamine; examples 4-5 compared to example 3 demonstrate that further use of (3-hydroxy-2-oxo-2H-pyrazin-1-yl) -acetic acid ethyl ester in the finishing liquor has substantially no effect on the breaking strength of the spliced cashmere fibers.
The test result of the breaking elongation of the functionalized cashmere fiber prepared by the invention is shown in fig. 3, wherein the breaking elongation of the grafted cashmere fiber prepared by the embodiment 3 is 40.59%, the breaking elongation of the grafted cashmere fiber prepared by the comparative example 1 is 43.72%, and the embodiment 3 is compared with the comparative example 1, and shows that the breaking elongation of the grafted cashmere fiber obtained after the cashmere fiber is immersed in the penetrating agent containing N-ethyl glucosamine for pretreatment is reduced before the cashmere fiber is grafted; example 3 compared to examples 1-2 shows that the elongation at break of the grafted cashmere fiber decreases with increasing amounts of N-ethyl glucosamine used; examples 4-5 compared to example 3 demonstrate that further use of (3-hydroxy-2-oxo-2H-pyrazin-1-yl) -acetic acid ethyl ester in the finishing liquor has substantially no effect on elongation at break of the spliced cashmere fibers.
The breaking strength of the functional cashmere fiber obtained by the invention is 0.5-0.62 cN/dtex, and the breaking elongation is less than 43%.
3. Antistatic Performance test
Test sample: the conductive cashmere yarns of examples 6-10 and comparative example 2 were used as samples for antistatic testing by weaving double rib knit swatches on a 12-needle (12-needle/inch) hand-operated flat knitting machine.
The testing method comprises the following steps: GB/T12703.1-2008. Antistatic properties are characterized by the electrostatic voltage half life of the test sample.
The antistatic performance test result of the conductive cashmere yarn prepared by the invention after the sample piece is woven is shown in fig. 4, wherein the static voltage half life of the conductive cashmere yarn prepared by the embodiment 8 is 8.29s, the static voltage half life of the woven sample piece prepared by the comparison example 2 is 12.59s, and the embodiment 8 is compared with the comparison example 2, and shows that the static voltage half life of the woven sample piece obtained by a series of treatments and procedures is reduced and the antistatic performance is improved after the cashmere fiber is immersed in the penetrating agent containing N-ethyl glucosamine for pretreatment before the cashmere fiber is grafted; example 8 shows that the antistatic properties of the woven coupons are improved with increasing amounts of N-ethyl glucosamine used as compared to examples 6-7; examples 9-10 compared with example 8 demonstrate that the antistatic properties of the woven coupons correlate with the use of ethyl (3-hydroxy-2-oxo-2H-pyrazin-1-yl) -acetate in the finishing liquor, and the use of ethyl (3-hydroxy-2-oxo-2H-pyrazin-1-yl) -acetate reduces the electrostatic half life of the woven coupons.
The electrostatic voltage half life of the knitted fabric obtained by knitting the conductive cashmere yarn is below 10s and above 3 s.
The above embodiments are merely for illustrating the present invention and not for limiting the same, and various changes and modifications may be made by one of ordinary skill in the art without departing from the spirit and scope of the invention. Therefore, all equivalent technical solutions are also within the scope of the present invention, which is defined by the claims.

Claims (7)

1. A method for preparing grafted cashmere fiber, comprising:
pretreating cashmere fibers in a penetrating agent solution, wherein the penetrating agent solution contains fatty alcohol polyoxyethylene ether and N-ethyl glucosamine; the penetrating agent solution contains 6-15wt% of fatty alcohol polyoxyethylene ether, and the penetrating agent solution contains 0.3-1.8wt% of N-ethyl glucosamine;
adding the pretreated cashmere fiber into an acrylonitrile solution, and then adding an initiator solution to react to obtain grafted cashmere fiber; the acrylonitrile content in the acrylonitrile solution is 45-55wt%.
2. The method for preparing the grafted cashmere fiber according to claim 1, wherein the method comprises the following steps: the initiator is potassium persulfate.
3. The grafted cashmere fiber prepared by the method of any of claims 1-2.
4. A functional cashmere fiber, comprising: a functional cashmere fiber obtained by finishing the grafted cashmere fiber according to claim 3 in a functional solution; the functional solution contains chitosan, polyurethane emulsion, lauryl betaine, sodium alginate, sodium dodecyl sulfate and water; the addition amount of chitosan is 0.3-2.1wt% of water, the addition amount of polyurethane emulsion is 0.5-2.5wt% of water, the addition amount of lauryl betaine is 0.3-1.2wt% of water, the addition amount of sodium alginate is 0.5-1.5wt% of water, and the addition amount of sodium dodecyl sulfate is 0.4-1.2wt% of water.
5. A conductive cashmere yarn, comprising: a conductive cashmere yarn spun from the functional cashmere fiber of claim 4 and conductive carbon fiber.
6. The conductive cashmere yarn as claimed in claim 5, wherein: the content of the conductive carbon fiber in the conductive cashmere yarn is 6-14wt%.
7. Use of the conductive cashmere yarn of claim 5 in antistatic cashmere products.
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CN105350319A (en) * 2015-10-26 2016-02-24 北京石油化工学院 Method for grafting and modifying cashmere
CN105876901A (en) * 2016-05-18 2016-08-24 太仓协大申泰羊毛衫有限公司 Blended woolen sweater
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