Solvent method based high-wet-modulus bamboo, wood and cotton mixed fiber and preparation method thereof
A high wet modulus, mixed fiber technology, applied in the direction of cellulose/protein conjugated artificial filament, etc.
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Embodiment 1
[0055] A kind of preparation method of the bamboo, wood, cotton mixed fiber of high wet modulus by solvent method, is made up of following steps:
[0056] (1) activation
[0057] The activation process is simple, less chemical reagents are added, and the whole process takes 1 hour, which is short in time and easy to operate. details as follows:
[0058] Deploy process water → add pulp → adjust ph value → add cellulase → terminate activation
[0059] Deployment process water: use deionized water; parameters: conductivity 2 , pH value: 6-8, temperature: 20-80°C;
[0060] Add pulp: bamboo pulp, wood pulp and cotton pulp; parameters: polymerization degree 300-1500, bamboo pulp: wood pulp: cotton pulp mass ratio = 1%-99%: 1%-99%: 1%-99%;
[0061] Adjust pH value: adjust with acid and alkali; parameters: pH value 4-6;
[0062] add cellulase: liquid cellulase; parameter: name AL70, product number IPL5B06610, supplier BIOPRACT;
[0063] Termination of activation: adding alkali...
Embodiment 2
[0080] Embodiment 2: bamboo, wood, cotton mixed cotton type fiber
[0081] Mix bamboo, wood and cotton pulp with a polymerization degree of 500, bamboo pulp: wood pulp: cotton pulp mass ratio = 40%: 30%: 30%, and add it until the conductivity is 2 , pH value: 6.8, temperature: 50 ℃ process water, adjust the pH value at 5, add cellulase to activate for one hour, add sodium hydroxide to terminate the activation, adjust the pH value at 10.5, and the pulp porridge after the activation is terminated is vacuum dehydrated After pressing, control the water content of 48% of the water-containing cellulose, crush it into 3cm*3cm particles, add 78% N-methylmorpholine-N-oxide aqueous solution, wherein the water-containing cellulose and N-methylmorpholine The mass ratio of the morphine-N-oxide aqueous solution is 1:4 to make the pulp swell, the outlet temperature is 70°C, the composition of the pre-dissolved pulp is: 11.5% cellulose, pH 9.5, the mixed solution after the pre-dissolver enters...
Embodiment 3
[0083] Embodiment 3: bamboo, wood, cotton mixed medium and long fiber
[0084] Mix bamboo, wood and cotton pulp with a polymerization degree of 550, bamboo pulp: wood pulp: cotton pulp mass ratio = 35%: 30%: 35%, and add it until the conductivity 2, pH value: 6.0, temperature: 50 ℃ process water, adjust the pH value at 4.5, add cellulase to activate for one hour, add sodium hydroxide to terminate the activation, adjust the pH value at 11, terminate the activated pulp porridge, and vacuum After dehydration and pressing, control the water content of cellulose to 53% by mass, crush it into 3cm*3cm particles, add 85% N-methylmorpholine-N-oxide aqueous solution, wherein the cellulose and N-methyl The mass ratio of the morpholine-N-oxide aqueous solution is 1:3 to make the pulp swell, the outlet temperature is 68°C, the composition of the pre-dissolved pulp is: 9.5% cellulose, pH 9.0, and the mixed solution after passing through the pre-dissolving machine enters the dissolving machin...
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