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CN-122013534-A - Low-temperature plasma crease-resistant finishing process for environment-friendly silk fabric

CN122013534ACN 122013534 ACN122013534 ACN 122013534ACN-122013534-A

Abstract

The invention discloses an environment-friendly low-temperature plasma crease-resistant finishing process for silk fabric, and particularly relates to the technical field of biopolymer engineering. The process sequentially comprises the steps of pre-cleaning, low-temperature plasma activation, polyproline solution impregnation, rolling pre-drying, acetylation treatment, neutralization soaping, dehydration, drying and the like. The method comprises the steps of carrying out microetching and activating on the silk surface through oxygen low-temperature plasma to increase reaction sites, constructing a biological cross-linking network imitating spider silk elasticity on the fiber surface by utilizing polyproline with a II-type spiral structure, and blocking unreacted amino groups through acetylation treatment to enhance hydrophobicity and network stability. The process does not need formaldehyde resin, maintains high breaking strength retention rate and washing stability while realizing excellent wrinkle resistance, has the comprehensive advantages of environmental protection and excellent durability, and is suitable for crease-resistant function finishing of high-end silk products.

Inventors

  • SUN JIN
  • ZHONG XIAOHONG
  • LIU ZHONGLIANG
  • ZHOU YANHUA
  • ZHU YULIN

Assignees

  • 江苏鑫缘丝绸科技有限公司

Dates

Publication Date
20260512
Application Date
20260323

Claims (10)

  1. 1. The low-temperature plasma crease-resistant finishing process for the environment-friendly silk fabric is characterized by comprising the following steps of: s1, soaking silk in a neutral soap flake solution and heating, then placing the treated silk in warm water for full washing, and finally placing the washed silk in a baking oven for drying to obtain pre-washed silk; s2, placing the pre-cleaned silk obtained in the S1 in radio frequency glow discharge low-temperature plasma equipment, spreading a silk monolayer on an electrode of a treatment cabin to seal the cabin body, and obtaining plasma activated silk after the reaction is finished; S3, preparing a polyproline solution by using a phosphate buffer solution, and then immersing the silk activated by plasma into the polyproline solution according to the bath ratio of the silk to the polyproline solution of 1:20, and stirring at a rotating speed of 30rpm for 30 minutes to obtain immersed silk; s4, rolling the immersed silk, controlling the liquid carrying rate, then placing the silk in a baking oven for pre-baking, and then raising the temperature of the baking oven and preserving heat; s5, mixing acetic anhydride and glacial acetic acid to prepare an acetylation treatment liquid, immersing the silk baked in the S4 into the acetylation treatment liquid, and then placing the silk in a constant-temperature water bath for heat preservation; s6, washing the silk treated in the S5 with cold water, then soaking the silk in sodium bicarbonate solution according to a bath ratio of 1:30, then soaping the silk in neutral soap flake solution, and finally washing the silk with warm water; S7, placing the silk washed by the warm water in the step S6 into a centrifugal dehydrator at 1000rpm to dehydrate for 3 minutes, and then spreading the dehydrated silk in a blast drying oven at 70 ℃ to dry to constant weight; And S8, sequentially carrying out fabric fold recovery angle test, breaking strength test and 5 times of family washing test simulation to verify the durability of the crease-resistant effect.
  2. 2. The low-temperature plasma crease-resistant finishing process of the environment-friendly silk fabric, as claimed in claim 1, is characterized in that in S1, the silk fabric is soaked in a neutral soap flake solution at a bath ratio of 1:30-1:50, and then the solution is heated to 95-100 ℃ and is kept for 60 minutes.
  3. 3. The low-temperature plasma crease-resistant finishing process of the environment-friendly silk fabric, as claimed in claim 1, is characterized in that in S1, the treated silk is placed in warm water at 35-40 ℃ for fully washing for 5 minutes, and finally the washed silk is placed in an oven with relative humidity of 65+/-4% and temperature of 60 ℃ for drying for 24 hours.
  4. 4. The low-temperature plasma crease-resistant finishing process for the environment-friendly silk fabric, as claimed in claim 1, is characterized in that the working power of the low-temperature plasma equipment in S2 is 80W, the cavity gas is oxygen, the cavity gas pressure is 30-50 Pa, and the working time is 5 minutes.
  5. 5. The low-temperature plasma crease-resistant finishing process of the environment-friendly silk fabric, as claimed in claim 1, is characterized in that phosphate buffer solution adopted in S3 is 0.1M buffer solution with pH of 6.5, and then polyproline with molecular weight of 3000-10000 is added to prepare 1.0-2.0% (w/v) solution.
  6. 6. The low-temperature plasma crease-resistant finishing process of the environment-friendly silk fabric according to claim 1, wherein the impregnated silk is rolled under a uniform pressure of 0.3-0.5 MPa in S4, the liquid carrying rate of the silk is controlled to be 80+/-5%, the silk is placed in an 80 ℃ oven for pre-drying for 5-10 minutes, and the temperature in the oven is raised to 130 ℃ for drying for 4-5 minutes.
  7. 7. The low-temperature plasma crease-resistant finishing process for the environment-friendly silk fabric, as claimed in claim 1, is characterized in that acetic anhydride and glacial acetic acid are uniformly mixed in a volume of 1:4 in S5 to obtain an acetylation treatment liquid.
  8. 8. The low-temperature plasma crease-resistant finishing process of the environment-friendly silk fabric, as claimed in claim 1, is characterized in that the baked silk is fully soaked in an acetylation treatment liquid in a bath ratio of 1:5 in S5, and then the mixed system is placed in a constant-temperature water bath at 60 ℃ for heat preservation reaction for 60 minutes.
  9. 9. The low-temperature plasma crease-resistant finishing process of the environment-friendly silk fabric according to claim 1, wherein in S6, firstly, acetylated silk is washed for 10 minutes with water at 10-15 ℃, then, silk is soaked in sodium bicarbonate solution with the concentration of 1-2% (w/v) for 15 minutes in a bath ratio of 1:30, then, silk is soaped in neutral soap flake solution with the concentration of 60 ℃ and 1-1.2 g/L for 10-15 minutes, and finally, silk is washed with warm water at 50+/-2 ℃.
  10. 10. The low-temperature plasma crease-resistant finishing process of the environment-friendly silk fabric according to claim 1, wherein the silk washed by warm water is placed in a centrifugal dehydrator at 1000-1500 rpm for dehydration for 3-5 minutes in S7, and finally the dehydrated silk is spread in a blast drying oven at 70 ℃ for drying to constant weight.

Description

Low-temperature plasma crease-resistant finishing process for environment-friendly silk fabric Technical Field The invention relates to the technical field of biopolymer engineering, in particular to an environment-friendly silk fabric low-temperature plasma crease-resistant finishing process. Background Silk is used as a natural protein fiber, and the molecular chain structure is loose and lacks sufficient transverse cross-linking, so that the fabric is very easy to wrinkle in actual use, and the appearance and the high-end wear performance of the fabric are seriously affected. Although the traditional crease-resistant finishing can improve the problem to a certain extent, the special softness and wearing comfort of silk are often sacrificed, so that the application of silk products in the fields of high-quality clothing and home furnishings is restricted. For a long time, crease-resistant finishing of silk mainly depends on an aldehyde-containing resin finishing agent represented by dihydroxymethyl dihydroxyethylene urea. Although the finishing agent can endow the fabric with certain crease resistance through covalent crosslinking, free formaldehyde is easy to release in the finishing process, so that the textile has formaldehyde residue risk, and the ecological textile does not meet the increasingly strict standards and health consumption requirements. In addition, the production and application processes of the aldehyde-containing resin all involve environmental pollution, and the industrial trend of green spinning and sustainable development is difficult to adapt. The rigid covalent cross-linked network formed in the fiber by the traditional resin finishing agent can improve the wrinkle resistance, but seriously damages the natural conformation and molecular chain flexibility of silk protein, so that the problems of obviously reduced fiber strength, loss of elasticity and the like are caused. The finishing mode of changing functions by damage not only reduces the service life of the fabric, but also limits the application of the fabric in the fields of medical use, skin care, high-end underwear and the like with extremely high requirements on the biocompatibility and mechanical integrity of the material. Therefore, a novel finishing process which is not only effective in crease resistance, but also healthy, safe and environment-friendly for fibers is needed. Disclosure of Invention In order to overcome the defects in the prior art, the embodiment of the invention provides an environment-friendly low-temperature plasma crease-resistant finishing process for silk fabric, which solves the problems that silk is easy to crease, the traditional silk crease-resistant process depends on formaldehyde resin, and the traditional process cross-linking seriously damages the macromolecular structure of silk fibers. In order to achieve the above purpose, the present invention provides the following technical solutions: The low-temperature plasma crease-resistant finishing process for the environment-friendly silk fabric specifically comprises the following steps of: s1, soaking silk in a neutral soap flake solution and heating, then placing the treated silk in warm water for full washing, and finally placing the washed silk in a baking oven for drying to obtain pre-washed silk; s2, placing the pre-cleaned silk obtained in the S1 in radio frequency glow discharge low-temperature plasma equipment, spreading a silk monolayer on an electrode of a treatment cabin to seal the cabin body, and obtaining plasma activated silk after the reaction is finished; S3, preparing a polyproline solution by using a phosphate buffer solution, and then immersing the silk activated by plasma into the polyproline solution according to the bath ratio of the silk to the polyproline solution of 1:20, and stirring at a rotating speed of 30rpm for 30 minutes to obtain immersed silk; s4, rolling the immersed silk, controlling the liquid carrying rate, then placing the silk in a baking oven for pre-baking, and then raising the temperature of the baking oven and preserving heat; s5, mixing acetic anhydride and glacial acetic acid to prepare an acetylation treatment liquid, immersing the silk baked in the S4 into the acetylation treatment liquid, and then placing the silk in a constant-temperature water bath for heat preservation; s6, washing the silk treated in the S5 with cold water, then soaking the silk in sodium bicarbonate solution according to a bath ratio of 1:30, then soaping the silk in neutral soap flake solution, and finally washing the silk with warm water; S7, placing the silk washed by the warm water in the step S6 into a centrifugal dehydrator at 1000rpm to dehydrate for 3 minutes, and then spreading the dehydrated silk in a blast drying oven at 70 ℃ to dry to constant weight; And S8, sequentially carrying out fabric fold recovery angle test, breaking strength test and 5 times of family washing test simulation to verify the durabilit