Preparation method of flame-retardant polyacrylonitrile fabric

A technology for flame-retardant polyacrylonitrile and polyacrylonitrile fabrics, which is applied in the direction of flame-retardant fibers, textiles, papermaking, and fiber treatment, and can solve problems such as high preparation costs, cumbersome preparation processes, and difficulty in large-scale promotion and application. The effect of low equipment cost, simple operation steps, and easy continuous operation

Inactive Publication Date: 2017-07-28
TIANJIN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method avoids the defects caused by first synthesizing the flame-retardant comonomer and then copolymerizing with acrylonitrile, that is, difficulty in copolymerization, etc., but the preparation process is cumbersome, the preparation cost is high, and it is not easy to be popularized and applied on a large scale. Based on this, the design of a The preparation method of a kind of novel flame-retardant polyacrylonitrile fabric is particularly necessary

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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preparation example Construction

[0018] This specific embodiment adopts the following technical scheme: a preparation method of a flame-retardant polyacrylonitrile fabric, the preparation steps of which are: (1) sample preparation: cut the polyacrylonitrile fabric into a suitable size, and put it into a 20% alcohol content Soak in the aqueous solution for 4 hours, take it out, wash it with distilled water, and dry it;

[0019] (2) Grafting process: using the polyacrylonitrile fabric obtained in step (1) as a raw material, using benzophenone (BP) as an initiator, and utilizing ultraviolet light grafting technology, glycidyl methacrylate (GMA) Grafted onto the fabric surface;

[0020] (3) Amination process: the grafted polyacrylonitrile fabric obtained in step (2) is reacted in an aqueous solution with a content of ethylenediamine of 10-60 wt% at a temperature of 10-70 ° C, and the reaction time is 1 -10 h, take out the sample, wash it with distilled water, and dry it;

[0021] (4) Phosphorylation process: so...

Embodiment 1

[0024] Embodiment 1: a kind of preparation method of flame-retardant polyacrylonitrile fabric, its preparation steps are:

[0025] (1) Sample preparation: Cut the polyacrylonitrile fabric into a suitable size, soak it in an aqueous solution with an ethanol content of 20% for 4 hours, take it out, wash it with distilled water, and dry it for use.

[0026] (2) Grafting process: The polyacrylonitrile fabric sample was immersed in an acetone solution with a GMA content of 40 wt% and a BP content of 1.5 wt% at a temperature of 40 °C. After sample preparation, it was placed under a UV lamp for 20 min on both sides cross-irradiated. After the sample was taken out, it was washed with acetone to remove the surface homopolymer and excess GMA and BP, and then washed with distilled water and dried for use.

[0027] (3) Amination process: The grafted polyacrylonitrile fabric was immersed in an aqueous solution with ethylenediamine content of 20 wt% at a temperature of 30 °C. After reacting...

Embodiment 2

[0029] Embodiment 2: a kind of preparation method of flame-retardant polyacrylonitrile fabric, its preparation steps are:

[0030] (1) Sample preparation: Cut the polyacrylonitrile fabric into a suitable size, soak it in an aqueous solution with an ethanol content of 20% for 4 hours, take it out, wash it with distilled water, and dry it for later use.

[0031] (2) Grafting process: The polyacrylonitrile fabric sample was immersed in an acetone solution with a GMA content of 50 wt% and a BP content of 1.5 wt% at a temperature of 40 °C. After immersion for 3 hours, the sample was taken out and prepared. Then put it under the ultraviolet light for 30 minutes cross irradiation on both sides. After taking out the sample, wash it with acetone to remove the surface homopolymer and excess GMA and BP, then wash it with distilled water and dry it for use.

[0032] (3) Amination process: The grafted polyacrylonitrile fabric was immersed in an aqueous solution with ethylenediamine content...

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Abstract

The invention discloses a preparation method of flame-retardant polyacrylonitrile fabric, and relates to the technical field of textile products. The preparation method includes grafting glycidyl methacrylate onto polyacrylonitrile fabric by taking benzophenone as an initiator according to an ultraviolet light grafting technology so as to introduce epoxy groups; subjecting the obtained fabric to amination and phosphorylation to finally obtain the flame-retardant polyacrylonitrile fabric. The preparation method has the advantages that the glycidyl methacrylate is grafted onto the surface of the polyacrylonitrile fabric according to the ultraviolet light grafting technology, chemical modification is combined, nitrogen and phosphorus are introduced onto the surface of the fabric by means of the active epoxy groups, and accordingly, the polyacrylonitrile fabric with the flame-retardant effect is obtained; the preparation process is simple, easy to operate and suitable for continuous production, and the product does not contain halogen and is environment friendly and free of poison.

Description

technical field [0001] The invention relates to the technical field of textile products, in particular to a method for preparing a flame-retardant polyacrylonitrile fabric without halogen elements. Background technique [0002] Polyacrylonitrile fiber is a raw material for textile products with excellent performance. It has soft hand feeling, good warmth retention and good elasticity. It is called "synthetic wool". It has good dyeability, bright color, no mildew, and is resistant to sunlight and The weather resistance is particularly good, and it is widely used in clothing fabrics, tarpaulins, curtains and other fields. The biggest disadvantage of polyacrylonitrile fiber is that it is extremely flammable, the limiting oxygen index is only 17%-18.5%, and it will release highly toxic cyanide during combustion, which limits its application to a certain extent. [0003] The methods of flame-retardant polyacrylonitrile fabrics mainly include: blending flame-retardant modificatio...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M14/28D06M13/332D06M11/70D06M101/28
CPCD06M14/28D06M11/70D06M13/332D06M2101/28D06M2200/30
Inventor 任元林刘晓辉谷叶童曾倩张悦
Owner TIANJIN POLYTECHNIC UNIV
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