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
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[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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