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CN-121976395-A - Preparation method of polyester-cotton fabric based on P-N-Si ternary synergistic flame retardance and product thereof

CN121976395ACN 121976395 ACN121976395 ACN 121976395ACN-121976395-A

Abstract

The invention discloses a preparation method of a polyester-cotton fabric based on P-N-Si ternary synergistic flame retardance, which is characterized by comprising the following steps of (1) carrying out alkali reduction pretreatment on the polyester-cotton fabric under the action of an alkali reduction promoter, (2) padding the pretreated polyester-cotton fabric with finishing liquid containing phosphorus flame retardant monomers, dihydric alcohol/amine, silicon-containing components, cross-linking agent triol or ternary isocyanate, and carrying out double padding, wherein the padding liquid rate is 70-90%, and (3) carrying out polymerization and cross-linking reaction on the materials on the surface of the fabric through heat treatment to form an organic-inorganic hybridization flame retardant functional layer, wherein the heat treatment temperature is 70-90 ℃ and is prebaked for 2-5 minutes, and (4) carrying out soaping to remove unreacted materials so as to obtain the flame retardant functional polyester-cotton fabric. The flame-retardant fabric based on the ternary synergy of P-N-Si has excellent and durable flame-retardant finishing effect, and is suitable for fire-fighting and high-end home textile protective fabrics.

Inventors

  • JI PING
  • GU XIANGJUN
  • PAN NENGYU
  • WANG JIAYU
  • ZENG YONG
  • HUANG XUEGEN
  • ZHOU WEIHUA
  • CHEN JIAYONG

Assignees

  • 绍兴圣苗针纺有限公司
  • 浙江吉麻良丝新材料股份有限公司
  • 浙江吉麻良丝纺织科技有限公司

Dates

Publication Date
20260505
Application Date
20251231

Claims (10)

  1. 1. The preparation method of the polyester-cotton fabric based on the P-N-Si ternary synergistic flame retardance is characterized by comprising the following steps of: (1) Performing alkali deweighting pretreatment on the polyester-cotton fabric under the action of an alkali deweighting promoter to generate active hydroxyl and carboxyl on the surface of the polyester-cotton fabric; (2) Padding the pretreated polyester cotton fabric with finishing liquid containing phosphorus-containing flame-retardant monomer, dihydric alcohol/amine, silicon-containing component, and cross-linking agent triol or ternary isocyanate, wherein the padding liquid rate is 70-90%; (3) The materials are subjected to polymerization and cross-linking reaction on the surface of the fabric through heat treatment to form an organic-inorganic hybridization flame retardant functional layer, wherein the heat treatment temperature is 70-90 ℃ for pre-drying for 2-5 minutes, and the baking is continued at 160-180 ℃ for 1-3 minutes; (4) And (5) soaping to remove unreacted substances so as to obtain the flame-retardant functionalized polyester-cotton fabric.
  2. 2. The method for preparing the polyester-cotton fabric based on the ternary synergistic flame retardance of P-N-Si according to claim 1, wherein the alkali reduction promoter in the step (1) is one or any combination of cetyltrimethylammonium bromide, N, N, N ', N' -tetra (2-hydroxypropyl) ethylenediamine, low-molecular polyethylene glycol amine or alkyl glycoside, and the dosage is 0.5-5 g/L.
  3. 3. The method for preparing the polyester-cotton fabric based on the ternary synergistic flame retardance of P-N-Si according to claim 1, wherein the alkali reduction pretreatment is to put the polyester-cotton fabric into a solution containing 5-20 g/L NaOH and 1-3 g/L penetrating agent JFC for 20-40 minutes at 90-110 ℃, and then wash and dry the polyester-cotton fabric.
  4. 4. The method for preparing the polyester-cotton fabric based on the ternary synergistic flame retardance of P-N-Si according to claim 1, wherein the phosphorus-containing flame retardant monomer in the step (2) is one or any combination of DOPO-HQ, DOPO-ITA, 2-carboxyethyl phenyl phosphinic acid, tris (2-hydroxyethyl) phosphate and phenylphosphonic dichloride, and the use amount is 4-12wt%.
  5. 5. The method for preparing the polyester-cotton fabric based on the ternary synergistic flame retardance of P-N-Si according to claim 1, wherein the dihydric alcohol is one or any combination of bisphenol A, hydroquinone, butanediol or polycarbonate diol, and the dosage is 3-10wt%.
  6. 6. The method according to claim 1, wherein the diamine is one or any combination of ethylenediamine, hexamethylenediamine, isophoronediamine, 4' -diaminodiphenylmethane or m-xylylenediamine, in an amount of 3-10wt%.
  7. 7. The preparation method of the polyester-cotton fabric based on the ternary synergistic flame retardance of P-N-Si according to claim 1, wherein the silicon-containing component is one or any combination of isopropyl triethoxysilane, 3-aminopropyl triethoxysilane, gamma-glycidol ether oxypropyl trimethoxysilane and SiO2 sol, and the dosage is 2-8wt%.
  8. 8. The method for preparing the polyester-cotton fabric based on the ternary synergistic flame retardation of P-N-Si according to claim 1, wherein the triol in the step (3) is one or any combination of glycerol and trimethylolpropane, and the dosage is 1-4wt%.
  9. 9. The method for preparing the polyester-cotton fabric based on the ternary synergistic flame retardance of P-N-Si according to claim 1, wherein the ternary isocyanate is one or any combination of triphenylmethane triisocyanate and trimethylol propane triisocyanate, and the dosage is 1-4wt%.
  10. 10. Polyester cotton fabric obtainable by the process according to any one of claims 1 to 9.

Description

Preparation method of polyester-cotton fabric based on P-N-Si ternary synergistic flame retardance and product thereof Technical Field The invention belongs to the field of functional textiles, and particularly relates to a preparation method of a polyester-cotton fabric based on P-N-Si ternary synergistic flame retardance and a product thereof. Background The polyester-cotton fabric has the mechanical strength of polyester and the moisture absorption comfort of cotton, but has the defects of flammability, serious molten drop, durability, flame retardance and the like. The traditional coating or padding flame retardant has the common problems of hard hand feeling, poor ventilation and low washing fastness. Although the alkali reduction process is used for the imitation silk, the alkali reduction process is not used as an interface activation platform by a system. The existing P-N binary system carbon layer is easy to crack and insufficient in molten drop inhibition, and SiO 2 glassy barriers can be formed on the surface by introducing silicon element, so that the compactness and thermal barrier property of the carbon layer are remarkably improved, but the in-situ construction report of the P-N-Si ternary covalent crosslinking on the polyester-cotton surface is less. Disclosure of Invention The invention aims to provide a preparation method of a polyester-cotton fabric based on P-N-Si ternary synergistic flame retardance and a product thereof. In order to achieve the above purpose, the present invention adopts the following technical scheme. A preparation method of a polyester-cotton fabric based on P-N-Si ternary synergistic flame retardance comprises the following steps: (1) Performing alkali deweighting pretreatment on polyester-cotton fabric under the action of an alkali deweighting promoter to generate active hydroxyl and carboxyl on the surface of the fabric; (2) Padding the pretreated polyester cotton fabric with finishing liquid containing phosphorus-containing flame-retardant monomer, dihydric alcohol/amine, silicon-containing component, and cross-linking agent triol or ternary isocyanate, wherein the padding liquid rate is 70-90%; (3) The substances are subjected to polymerization crosslinking reaction on the surface of the fabric through heat treatment, so that an organic-inorganic hybrid flame-retardant functional layer is formed; (4) And (5) soaping to remove unreacted substances so as to obtain the flame-retardant functionalized polyester-cotton fabric. Preferably, the alkali reduction promoter in the step (1) is one or any combination of hexadecyl trimethyl ammonium bromide, N, N, N ', N' -tetra (2-hydroxypropyl) ethylenediamine, low molecular polyethylene glycol amine or alkyl glycoside, and the dosage is 0.5-5 g/L. Preferably, the alkali deweighting pretreatment is to put the polyester cotton fabric into a JFC solution containing 5-20 g/L NaOH and 1-3 g/L penetrant, and wash and dry the fabric after 20-40 minutes of treatment at 90-110 ℃. Preferably, the phosphorus-containing flame retardant monomer in the step (2) is one or any combination of DOPO-HQ, DOPO-ITA, 2-carboxyethyl phenyl phosphinic acid, tri (2-hydroxyethyl) phosphate and phenylphosphonic acid dichloride, and the dosage is 4-12wt%. Preferably, the dihydric alcohol is one or any combination of bisphenol A, hydroquinone, butanediol or polycarbonate diol, and the dosage is 3-10wt%. Preferably, the diamine is one or any combination of ethylenediamine, hexamethylenediamine, isophoronediamine, 4' -diaminodiphenylmethane or m-xylylenediamine, and the dosage is 3-10wt%. Preferably, the silicon-containing component is one or any combination of isocyanatopropyl triethoxysilane, 3-aminopropyl triethoxysilane, gamma-glycidol ether oxypropyl trimethoxysilane and SiO 2 sol, and the dosage is 2-8wt%. Preferably, the triol in the step (3) is one or any combination of glycerol and trimethylolpropane, and the dosage is 1-4wt%. Preferably, the step triisocyanate is one or any combination of triphenylmethane triisocyanate or trimethylol propane triisocyanate, and the dosage is 1-4wt%. Preferably, the heat treatment temperature in the step (3) is 70-90 ℃ for 2-5 minutes, and the heat treatment is continued at 160-180 ℃ for 1-3 minutes. According to the preparation method of the polyester-cotton fabric based on the P-N-Si ternary synergistic flame retardance, quantitative alkali decrement activation is carried out, the activated fabric is padded with a composite finishing liquid of a phosphorus-containing flame retardance monomer, binary or polyhydric alcohol/amine and a silicon-containing component agent crosslinking agent, and then in-situ copolycondensation is carried out on the surface of the fiber through heat treatment, so that a covalently anchored P-N-Si ternary synergistic organic-inorganic hybrid layer is formed. The obtained fabric has excellent and durable flame-retardant finishing effect, and is suitable for fire-fighting and high-end ho