A kind of bisamide oxime modified cellulose material, preparation method and application thereof
A technology of cellulose and bisamide oxime, which is applied in the field of preparation, modified cellulose materials, and amidoxime-hydroxime modified cellulose materials, which can solve the difficulty of separating micron-scale materials, poor recycling, low mechanical strength, etc. problem, achieve the effect of simple preparation method, good reproducibility and high mechanical strength
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Embodiment 1
[0029] (1) Cotton fiber alkalization: Weigh 5g of cotton fiber, put it in 250mL NaOH solution with a concentration of 1wt%, and scorch at 85°C for 120min, take out the filtered water and transfer it to 150mL NaOH solution with a concentration of 18wt%, at 20°C After stirring for 120 minutes, the product is filtered, washed with deionized water, and dried to obtain alkalized cotton fibers.
[0030] (2) Graft copolymerization: Take 2g of the above-mentioned alkalized cotton fiber and place it in a four-necked flask filled with 40mL of acetone solution. Ethyl acrylate was magnetically stirred for 10 minutes, then 0.01g of cerium ammonium nitrate and 0.01g of azobisisobutyronitrile were added to the above reaction solution, and the stirring reaction was continued for 4 hours. After taking out and filtering, it was washed with methanol, deionized water, and dried at 50°C. , to obtain graft copolymerized cotton fibers.
[0031] (3) Ammoximation: Dissolve 4g of hydroxylamine hydroch...
Embodiment 2
[0038] (1) Alkalization of viscose fiber: Weigh 5g of viscose fiber, put it in 100mL of NaOH solution with a concentration of 4wt%, simmer at 90°C for 90min, take out the filtered water and transfer it to 250mL of NaOH solution with a concentration of 12wt%. Stir at 25°C for 90 minutes, and the product is filtered, washed with deionized water, and dried to obtain alkalized viscose fiber.
[0039] (2) Graft copolymerization: Take 2g of the above-mentioned alkalized viscose fiber and place it in a four-necked flask filled with 60mL of isopropanol solution. - Ethoxy ethyl acrylate magnetically stirred for 15min, then added 0.01g of cerium ammonium nitrate and 0.008g of azobisisobutyronitrile into the above reaction solution, continued to stir and react for 2h, took out and filtered, washed with methanol, deionized water, 50 Dry at ℃ to obtain graft copolymerized viscose fiber.
[0040] (3) Ammoximation: Dissolve 4g of hydroxylamine hydrochloride and 2.3g of sodium hydroxide in m...
Embodiment 3
[0042] (1) Alkalinization of microcrystalline cellulose: Weigh 5g of microcrystalline cellulose, put it in 150mL of NaOH solution with a concentration of 2.5wt%, simmer at 100°C for 60min, take out the filtered water and transfer to 100mL of NaOH with a concentration of 25wt% The solution was stirred at 30°C for 75 minutes, and the product was filtered, washed with deionized water, and dried to obtain alkalized microcrystalline cellulose.
[0043] (2) Graft copolymerization: Take 2g of the above-mentioned alkalized microcrystalline cellulose and place it in a four-necked flask filled with 80mL of methanol solution. Ethoxyethyl acrylate was magnetically stirred for 45 minutes, then 0.05g of cerium ammonium nitrate and 0.05g of azobisisobutyronitrile were added to the above reaction solution, and the stirring reaction was continued for 6 hours. After taking out and filtering, it was washed with methanol, deionized water, and heated at 50°C. drying to obtain graft copolymerized m...
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Abstract
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