Search

CN-122013361-A - Flame-retardant modified cellulose PA56 composite fiber material and preparation method and application thereof

CN122013361ACN 122013361 ACN122013361 ACN 122013361ACN-122013361-A

Abstract

The invention relates to the technical field of textile materials, in particular to a flame-retardant modified cellulose PA56 composite fiber material, and a preparation method and application thereof. The preparation method of the flame-retardant modified cellulose PA56 composite fiber material comprises the following steps of (1) preparing a phytic acid ester derivative by esterification reaction of phytic acid, polyethylene glycol monomethyl ether and hydroxyethyl acrylate, (2) adding the phytic acid ester derivative and diethylenetriamine propyl methyl dimethoxy silane into a cellulose spinning stock solution to perform in-situ flame-retardant modification on cellulose, (3) preparing the flame-retardant modified cellulose PA56 composite material by melt mixing of the flame-retardant modified cellulose and PA56, and then preparing the flame-retardant modified cellulose PA56 composite fiber material by melt spinning. The flame-retardant modified cellulose PA56 composite fiber material can be used for preparing biomass-based flame-retardant functional nylon fabric.

Inventors

  • WANG JIRONG
  • ZHENG YA
  • ZHAO XINHUA
  • YIN YUANYUAN

Assignees

  • 福建恒捷实业有限公司

Dates

Publication Date
20260512
Application Date
20260206

Claims (9)

  1. 1. The preparation method of the flame-retardant modified cellulose PA56 composite fiber material is characterized by comprising the following steps: (1) Preparing polyethylene glycol and a phytic acid ester derivative modified by an acrylic ester group through esterification reaction of phytic acid, polyethylene glycol monomethyl ether and hydroxyethyl acrylate; (2) Adding the prepared phytic acid ester derivative and diethylenetriamine propyl methyl dimethoxy silane into cellulose spinning stock solution, and carrying out in-situ flame-retardant modification on cellulose; (3) And (3) preparing the flame-retardant modified cellulose PA56 composite material by melt mixing the flame-retardant modified cellulose obtained in the step (2) and PA56, and preparing the flame-retardant modified cellulose PA56 composite fiber material by melt spinning.
  2. 2. The method according to claim 1, wherein the molecular weight of the polyethylene glycol monomethyl ether in the step (1) is 1000, 2000, 5000 or 10000.
  3. 3. The method of claim 1, wherein the molar ratio of the phytic acid to the polyethylene glycol monomethyl ether in the step (1) is 1:1-1:6.
  4. 4. The method of claim 1, wherein the molar ratio of the phytic acid to the hydroxyethyl acrylate in the step (1) is 1:11-1:6.
  5. 5. The preparation method of claim 1, wherein the proportion of each component in the step (2) is 5 wt% -25 wt% of phytic acid ester derivative and 75 wt% -95 wt% of cellulose spinning solution, and the sum of the mass ratios is 100%.
  6. 6. The process according to claim 5, wherein 1mol of diethylenetriamine propyl methyl dimethoxy silane is added to 6 mol double bonds of the phytic acid ester derivative.
  7. 7. The preparation method of the flame-retardant modified cellulose PA56 composite material according to claim 1, wherein the raw materials for preparing the flame-retardant modified cellulose PA56 composite material in the step (3) comprise, by mass, 100 parts of PA56, 10-25 parts of flame-retardant modified cellulose and 3-5 parts of compatibilizer.
  8. 8. A flame retardant modified cellulosic PA56 composite fiber material obtainable by the process of any one of claims 1-7.
  9. 9. The application of the flame-retardant modified cellulose PA56 composite fiber material in preparing biomass-based flame-retardant functional nylon fabric according to claim 8.

Description

Flame-retardant modified cellulose PA56 composite fiber material and preparation method and application thereof Technical Field Flame-retardant modified cellulose PA56 composite fiber material and preparation method and application thereof Background With the increasing strictness of carbon emission reduction policies, the research and development of bio-based PA56 is focused, and the bio-based PA is one of competition hot spots of huge spinning heads at home and abroad. The bio-based polyamide 56 is a novel bio-based fiber prepared from crops, trees, other plants, residues and contents thereof by biological, chemical, physical and other means, and has excellent mechanical properties and biodegradability. However, the poor cohesion of the PA56 fiber, which causes static electricity and hairiness when the PA56 fiber is singly spun, has poor spinnability, and the Limit Oxygen Index (LOI) of the unmodified PA56 is only 20% -22%, and the flame retardant grade can only reach UL 94V-2, so that the PA56 fiber is a flammable material, and the thermal safety of the bio-based PA56 becomes one of the most important factors restricting the use scene and range of the PA fiber. With the development of bio-based PA56, the demand for flame retardant properties is also increasing, which has driven the research of bio-based flame retardants. Currently, common bio-based flame retardants include phytic acid, chitosan, lignin, cyclodextrins, alginates, and the like. However, large-scale popularization and application of most bio-based flame retardants are still limited by technical bottlenecks such as insufficient thermal stability, and the flame retardance and the thermal stability of the bio-based PA56 are difficult to comprehensively improve. Disclosure of Invention The invention aims to solve the technical problem of providing a flame-retardant modified cellulose PA56 composite fiber material, a preparation method and application thereof, and the prepared textile material has better flame retardance and thermal stability and has wide application prospect. The invention is realized in the following way: the invention firstly provides a preparation method of a flame-retardant modified cellulose PA56 composite fiber material, which comprises the following steps: (1) Preparing polyethylene glycol and a phytic acid ester derivative modified by an acrylic ester group through esterification reaction of phytic acid, polyethylene glycol monomethyl ether and hydroxyethyl acrylate; (2) Adding the prepared phytic acid ester derivative and diethylenetriamine propyl methyl dimethoxy silane into cellulose spinning stock solution, and carrying out in-situ flame-retardant modification on cellulose; (3) And (3) preparing the flame-retardant modified cellulose PA56 composite material by melt mixing the flame-retardant modified cellulose obtained in the step (2) and PA56, and preparing the flame-retardant modified cellulose PA56 composite fiber material by melt spinning. Further, the molecular weight of the polyethylene glycol monomethyl ether in the step (1) is 1000, 2000, 5000 or 10000. Further, in the step (1), the molar ratio of the phytic acid to the polyethylene glycol monomethyl ether is 1:1-1:6. Further, in the step (1), the molar ratio of the phytic acid to the hydroxyethyl acrylate is 1:11-1:6. Further, the proportion of each component in the step (2) is 5 wt% -25 wt% of phytic acid ester derivative and 75 wt% -95 wt% of cellulose spinning solution, and the sum of the mass ratios is 100%. Furthermore, 1mol of diethylenetriamine propyl methyl dimethoxy silane is needed to be added into 6 mol double bonds in the phytic acid ester derivative. Further, the raw materials for preparing the flame-retardant modified cellulose PA56 composite material in the step (3) comprise, by mass, 100 parts of PA56, 10-25 parts of flame-retardant modified cellulose and 3-5 parts of compatibilizer. The invention also provides a flame-retardant modified cellulose PA56 composite fiber material obtained by the preparation method. The flame retardant has two flame retarding mechanisms of a solidification phase and a gas phase, three flame retarding elements of P, N and Si are fixed in a crosslinked network through amino-double bond reaction, the problems of easy volatilization, agglomeration, migration, leaching and the like of the flame retardant are overcome, and the flame retardant has the characteristic of lasting flame retarding performance. Meanwhile, the compatibility between the flame-retardant cellulose material and the PA56 is improved through the hydrogen bond between the network and the cellulose, the flame retardant property of the polyamide is improved, and the physical property and the mechanical property of the polyamide can be better maintained. The phytic acid nuclear pyrolysis generates P-containing free radicals, and the free radicals can interrupt the combustion chain reaction and the exothermic process of the polymer so as to slow down co