Method for dyeing carboxymethyl chitosan silicon-modified cotton fabric with natural dyes

[0025] 1) Take 20g of chitin, soak it in 60% sodium hydroxide solution at 60°C for 8 hours, wash it with hot water until neutral, dry it at 60°C, grind it finely to obtain chitosan;

[0026] 2) Dissolve chitosan in dilute acetic acid, precipitate with excess acetone to obtain chitosan acetate, transfer it to a stirred reaction vessel, add NaOH solution and isopropanol, and add chlorine dropwise while stirring The isopropanol solution of acetic acid is controlled at a reaction temperature of 65° C., reacted for 4 hours, cooled to room temperature, adjusted to neutral pH with dilute acid, washed with 85 wt % methanol, and dried to obtain carboxymethyl chitosan;

[0027] 3) Use 6g / L carboxymethyl chitosan solution, add 5mL glycidyl trimethoxysiloxane, and stir until it is completely dissolved under the condition that the bath ratio is 1:200 and the pH value is adjusted to 8 with ammonia water Carboxymethyl chitosan silicon hybrid system can be obtained;

[0028] 4) Treat the cott

[0034] 1) Take 30g of chitin, soak it in 60% sodium hydroxide solution at 60°C for 12h, wash it with hot water until neutral, dry it at 60°C, grind it finely to get chitosan;

[0035] 2) Dissolve chitosan in dilute acetic acid, precipitate with excess acetone to obtain chitosan acetate, transfer it to a stirred reaction vessel, add NaOH solution and isopropanol, and add chlorine dropwise while stirring The isopropanol solution of acetic acid is controlled at a reaction temperature of 65° C., reacted for 4 hours, cooled to room temperature, adjusted to neutral pH with dilute acid, washed with 85 wt % methanol, and dried to obtain carboxymethyl chitosan;

[0036] 3) Use 9g / L carboxymethyl chitosan solution, add 7.5mL glycidyltrimethoxysiloxane, and stir until all Carboxymethyl chitosan silicon hybrid system can be obtained by dissolving;

[0037] 4) Treat the cotton fabric with the above solution in a constant temperature oscillating dyeing machine at 40°C. After treatment for 9

[0043] 1) Take 10g of chitin, soak it in 60% sodium hydroxide solution at 60°C for 4 hours, wash it with hot water until it becomes neutral, dry it at 60°C, and grind it finely to obtain chitosan;

[0044]2) Dissolve chitosan in dilute acetic acid, precipitate with excess acetone to obtain chitosan acetate, transfer it to a stirred reaction vessel, add NaOH solution and isopropanol, and add chlorine dropwise while stirring The isopropanol solution of acetic acid is controlled at a reaction temperature of 65° C., reacted for 4 hours, cooled to room temperature, adjusted to neutral pH with dilute acid, washed with 85 wt % methanol, and dried to obtain carboxymethyl chitosan;

[0045] 3) Use 3g / L carboxymethyl chitosan solution, add 2.5mL glycidyltrimethoxysiloxane, and stir until all Carboxymethyl chitosan silicon hybrid system can be obtained by dissolving;

[0046] 4) Treat the cotton fabric with the above solution at 40°C in a constant temperature oscillating dyeing machine.