A kind of amidoximated composite fiber and preparation method thereof
A composite fiber and fiber technology, applied in chemical instruments and methods, alkali metal compounds, inorganic chemistry, etc., can solve the problems of high manufacturing cost, low adsorption capacity, poor adsorption selectivity, etc.
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[0024] The invention provides a kind of preparation method of amidoximation composite fiber, comprises the following steps:
[0025] a) dissolving polyvinyl alcohol and polyacrylonitrile in a solvent to obtain a stock solution;
[0026] b) performing defoaming, spinning and coagulation molding on the stock solution to obtain composite fibers;
[0027] c) placing the composite fiber in an aqueous solution of acrylonitrile, and performing electron beam irradiation treatment to obtain an irradiated fiber;
[0028] d) heat-treating the irradiated fibers in an aqueous solution of hydroxylamine hydrochloride to obtain amidoximated composite fibers.
[0029] In the present invention, specific polyvinyl alcohol and polyacrylonitrile are spun to obtain composite fibers, and then electron beam irradiation treatment is carried out in a specific acrylonitrile solution to cross-link the composite fibers and improve the strength of the fibers themselves. At the same time, the acrylic Nitr...
Embodiment 1
[0051] Polyvinyl alcohol and polyacrylonitrile were dissolved in dimethyl sulfoxide at 80° C. at a mass ratio of 90:10 to obtain a stock solution with a solid content of 10%. The stock solution is defoamed (temperature is 80°C, air pressure is 1 / 4 atmospheric pressure), spinning (temperature is 90°C), solidified and formed (sodium sulfate-sulfuric acid coagulation bath, temperature is 45°C), and then heat-stretched (the temperature is 180° C., and the draw ratio is 4 times), heat setting treatment (the temperature is 180° C., and the duration is 3 minutes), to obtain a composite fiber.
[0052] The obtained composite fiber is placed in an acrylonitrile aqueous solution with a mass concentration of 9%, and irradiated with an electron beam of 10kGy; then it is taken out and cleaned, and then placed in an aqueous solution of hydroxylamine hydrochloride with a mass concentration of 25%, and the hydroxylamine hydrochloride in the aqueous solution of hydroxylamine hydrochloride and ...
Embodiment 2
[0054] Polyvinyl alcohol and polyacrylonitrile were dissolved in dimethyl sulfoxide at 80° C. at a mass ratio of 90:10 to obtain a stock solution with a solid content of 10%. The stock solution is defoamed (temperature is 80°C, air pressure is 1 / 4 atmospheric pressure), spinning (temperature is 90°C), solidified and formed (sodium sulfate-sulfuric acid coagulation bath, temperature is 45°C), and then heat-stretched (the temperature is 180° C., and the draw ratio is 4 times), heat setting treatment (the temperature is 180° C., and the duration is 3 minutes), to obtain a composite fiber.
[0055] The obtained composite fiber is placed in an acrylonitrile aqueous solution with a mass concentration of 9%, and irradiated with an electron beam of 20kGy; then it is taken out and cleaned, and then placed in an aqueous solution of hydroxylamine hydrochloride with a mass concentration of 25%, and the hydroxylamine hydrochloride in the aqueous solution of hydroxylamine hydrochloride and ...
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Abstract
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