Regulative method for free radical generation in ramie oxidation and degumming process
A technology of oxidative degumming and free radicals, which is applied in the direction of producing bast fiber by chemical method, which can solve the problems of glycosidic bond breaking, cellulose polymerization degree decrease, strength, elongation at break, softness and hand feeling performance deterioration, etc. , to achieve the effect of reducing the degradation of cellulose macromolecules, reducing cellulose damage, and excellent degumming effect
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Embodiment 1
[0029] A method for regulating the generation of free radicals in the process of oxidative degumming of ramie is as follows:
[0030] 1.0 kg of hydrogen peroxide, 0.4 kg of sodium salicylate, 0.2 kg of sodium sulfamate, 0.3 kg of urea, 0.1 kg of sodium dodecylbenzenesulfonate, and 98.0 kg of water were added to form a degumming solution. Dip 10 kg of ramie raw material into the degumming solution. Start to heat up from room temperature, rise to 70°C within half an hour, keep at this temperature for 60 minutes, and fully remove the colloid. Remove the degummed degummed hemp from the reaction system, wash it repeatedly with clean water, then apply oil with a mass concentration of 1.5% for 2 hours, then dry it, put it in an oven at 100°C for 4 hours, and use a silk spinning opener to dry it. Open and comb to obtain dispersed lean hemp fibers. The fineness of the fiber is tested by the mid-end cutting method, the fiber strength is tested by the bundle fiber strength instrument, ...
Embodiment 2
[0034] A method for regulating the generation of free radicals in the process of oxidative degumming of ramie is as follows:
[0035] 0.8 kg of urea peroxide, 0.3 kg of sodium citrate, 0.3 kg of tetramethylbenzoquinone, 0.2 kg of thiourea, 0.1 kg of sodium lauryl sulfate, and 98.3 kg of water were added to form a degumming solution. Dip 10 kg of ramie raw material into the degumming solution. Start to heat up from room temperature, rise to 80°C within half an hour, keep at this temperature for 150 minutes, and fully remove the colloid. Remove the degummed degummed hemp from the reaction system, wash it repeatedly with clean water, then apply oil with a mass concentration of 1.5% for 2 hours, then dry it, put it in an oven at 100°C for 4 hours, and use a silk spinning opener to dry it. Open and comb to obtain dispersed lean hemp fibers. The fineness of the fiber is tested by the mid-end cutting method, the fiber strength is tested by the bundle fiber strength instrument, the ...
Embodiment 3
[0037] A method for regulating the generation of free radicals in the process of oxidative degumming of ramie is as follows:
[0038]1.0 kg of sodium percarbonate, 0.3 kg of sodium benzoate, 0.1 kg of crotonic acid, 0.2 kg of dimethyl sulfoxide, 0.15 kg of polyvinyl alcohol, and 98.25 kg of water were added to form a degumming solution. Dip 10 kg of ramie raw material into the degumming solution. Start to heat up from room temperature, rise to 85°C within half an hour, keep at this temperature for 90 minutes, and fully remove the colloid. Remove the degummed degummed hemp from the reaction system, wash it repeatedly with clean water, then apply oil with a mass concentration of 1.5% for 2 hours, then dry it, put it in an oven at 100°C for 4 hours, and use a silk spinning opener to dry it. Open and comb to obtain dispersed lean hemp fibers. The fineness of the fiber is tested by the mid-end cutting method, the fiber strength is tested by the bundle fiber strength instrument, t...
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