A kind of anti-ultraviolet aromatic high-performance fiber based on poss grafting and its modification method

A high-performance fiber, anti-ultraviolet technology, applied in the direction of light-resistant fiber, fiber type, fiber treatment, etc., can solve the problems of poor anti-ultraviolet performance and water washing resistance, achieve small physical and mechanical properties of fibers, improve strength retention rate, and solve the Poor washing effect

Active Publication Date: 2018-10-26
CHENGDU TEXTILE COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the anti-ultraviolet aromatic high-performance fiber provided by the present invention is connected to the cage-type POSS with anti-ultraviolet ability through covalent bonds on its surface, and the modification process has little influence on the physical and mechanical properties of the fiber, it not only solves the problem of conventional Amino POSS treated fibers with a base have the disadvantages of poor UV resistance and washing resistance, and can also form a protective layer of octasilsesquioxane on the fiber surface, which can more effectively improve the strength retention of fibers after ultraviolet light irradiation Rate

Method used

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  • A kind of anti-ultraviolet aromatic high-performance fiber based on poss grafting and its modification method
  • A kind of anti-ultraviolet aromatic high-performance fiber based on poss grafting and its modification method
  • A kind of anti-ultraviolet aromatic high-performance fiber based on poss grafting and its modification method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] In parts by weight, soak 100 parts of PPTA fiber in 50wt% sulfuric acid solution at 50°C for 10 hours, rinse it in tap water immediately after taking it out, and then soak it in 5g / L sodium bicarbonate solution for 5 minutes to neutralize the residual acid After taking out the sample, wash it twice in cold distilled water and hot distilled water respectively, and finally dry it naturally in a light-proof and ventilated environment. Weigh 10 parts of acid-pretreated fibers and place them in a round bottom flask, add 10 parts of dichloromethane and 20 parts of thionyl chloride, and heat to reflux for 8 hours. After the reaction is over, take out the fiber, filter it dry, and then use 100 parts of dichloromethane to repeatedly stir and wash it, take it out and hang it in a dark and ventilated place to dry. Put 10 parts of aminopropyl POSS into a round bottom flask, add 5 parts of dichloromethane and 25 parts of saturated aqueous sodium chloride. Slowly add 20 g / L NaOH sol...

Embodiment 2

[0070] In parts by weight, soak 100 parts of PPTA fiber in 70% polyphosphoric acid / sulfuric acid (volume ratio 1:1) mixed solution at 45°C for 6 hours, rinse it in tap water immediately after taking it out, and then put 1g / L bicarbonate Soak in sodium / sodium carbonate (volume ratio 1:1) mixed solution for 30 minutes to neutralize the residual acid, take out the sample, wash it twice in cold distilled water and hot distilled water respectively, and finally dry it naturally in a light-proof and ventilated environment . Weigh 5 parts of acid-pretreated fibers and place them in a round-bottomed flask, add 40 parts of dichloromethane and 1 part of thionyl chloride, and heat to reflux for 10 hours. After the reaction is over, take out the fiber, filter it dry, and then use 40 parts of dichloromethane to stir and wash it repeatedly, take it out and hang it in a dark and ventilated place to dry. Put 8 parts of aminomethyl POSS / aminoethyl POSS (molar ratio 1:1) into a round bottom fla...

Embodiment 3

[0074] In parts by weight, soak 100 parts of PPTA fiber in 40% methanesulfonic acid solution at 40°C for 2 hours, rinse it in tap water immediately after taking it out, and then soak it in 10g / L sodium hydroxide solution for 15 minutes to neutralize the residual After taking out the sample, wash it twice in cold distilled water and hot distilled water respectively, and finally dry it naturally in a light-proof and ventilated environment. Weigh 8 parts of the acid-pretreated fibers and place them in a round-bottomed flask, add 50 parts of methylene chloride and 30 parts of thionyl chloride, and heat to reflux for 1 hour. After the reaction is over, take out the fiber, filter it dry, and then use 60 parts of dichloromethane to repeatedly stir and wash it, take it out and hang it in a dark and ventilated place to dry. Put 1 part of aminoethyl POSS into a round bottom flask, add 50 parts of dichloromethane and 50 parts of saturated aqueous sodium chloride. Slowly add 5 g / L NaOH s...

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Abstract

The invention belongs to the technical field of preparation of an aromatic high-performance fiber and specifically relates to an ultraviolet-resistant aromatic high-performance fiber and a modification method thereof. The method comprises the following steps: pre-treating a fiber with an acid solution, breaking macromolecules on the fiber surface, and forming amide groups or carboxyl groups; performing acylating chlorination treatment on the amide groups or carboxyl groups; endowing the fiber surface with vivid reactivity; and finally, using ammonia POSS without base for reacting, and directly connecting the cage type POSS with the fiber surface, thereby acquiring the ultraviolet-resistant aromatic high-performance fiber. The influences of the modification process on the physical and mechanical properties of the fibers are small; the defects of poor ultraviolet resistance and washing resistance of the fibers treated with the ammonia POSS with base in the prior art can be overcome; an octa-polysilsesquioxane protecting layer is formed on the fiber surface, so that the strong retention rate of the fiber after ultraviolet irradiation is effectively increased; the raw materials are easily acquired; the ultraviolet-resistant aromatic high-performance fiber is non-toxic and environment-friendly; the compounding process is simple and is easily controlled; no other special requirement for the compounding equipment exists; and therefore, the ultraviolet-resistant aromatic high-performance fiber is more suitable for industrial production.

Description

technical field [0001] The invention belongs to the technical field of aromatic high-performance fibers and their preparation, in particular to a POSS-based grafted anti-ultraviolet aromatic high-performance fiber and a modification method thereof. Background technique [0002] Aromatic high-performance fibers such as fully aromatic polyamide (aramid) and poly-p-phenylene 1,3,4-oxadiazole (p-POD) have excellent physical and mechanical properties, thermal stability, electrical insulation, Solvent resistance, special conductivity and electroluminescence properties, often used as high temperature resistant filter cloth, permeable membrane and insulation protection materials (Zhang Z, Ye G, Li W, Li T, XuJ. Influence of sulfuric acid bath on morphological structure and mechanical properties of poly(p-phenylene-1,3,4-oxadiazole) fibers[J].Journal of Applied Polymer Science,2009,114(3):1485-1493; Schulz B,Bruma M,Brehmer L. AromaticPoly(1,3,4-oxadiazoe)s as advanced materials[J]....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06M15/643D06M13/08D06M13/268D06M101/30D06M101/36
CPCD06M13/08D06M13/268D06M15/6436D06M2101/30D06M2101/36D06M2200/25
Inventor 冒亚红管宇
Owner CHENGDU TEXTILE COLLEGE
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