Solvent-process high wet modulus chitin fibers and preparation method thereof

A technology of chitin fiber and high wet modulus, applied in the textile field, can solve the problems of high energy consumption of viscose fiber, wet modulus of viscose fiber, low dry strength and wet strength, high pollution, etc.

Inactive Publication Date: 2020-02-18
SHANGHAI LYOCELL FIBER DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Viscose fiber has long-term production characteristics such as high energy consumption, high pollution, and complicated processes, so the produ

Method used

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  • Solvent-process high wet modulus chitin fibers and preparation method thereof
  • Solvent-process high wet modulus chitin fibers and preparation method thereof

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preparation example Construction

[0062] A preparation method of chitin fiber with high wet modulus by solvent method, comprising the following steps:

[0063] (A) activation

[0064] The activation process is simple, less chemical reagents are added, and the whole process takes about 1 hour, which is short in time and easy to operate. The process is as follows:

[0065] Prepare process water → add pulp → adjust pH value → add cellulase → terminate activation.

[0066] Among them, the deployment of process water: process water using deionized water; parameter requirements: conductivity 2 , pH 6-8, temperature 20-80°C.

[0067] Adding pulp: wood pulp or bamboo pulp is used, and the degree of polymerization is 300-1500.

[0068] Adjust the pH value: adjust the pH to 4-6 with acid and alkali.

[0069] Adding cellulase: use liquid cellulase, optional commercially available trade name AL70, product number IPL 5B06610, supplier BIOPRACT.

[0070] Termination of activation: Add alkali to adjust the pH to 9-1...

Embodiment 1

[0088] Add the pulp with a degree of polymerization of 500 until the conductivity is less than 5μs / cm 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; after the activation is terminated, the porridge is vacuum dehydrated After pressing, control the water content of the hydrous cellulose to 48wt%, and crush it into 3cm*3cm particles; then add 5wt% chitin aqueous solution and 81wt% N-methylmorpholine-N-oxide aqueous solution, wherein the The mass ratio of cellulose and chitin aqueous solution is 1: 0.16, the mass ratio of hydrous cellulose and N-methylmorpholine-N-oxide aqueous solution is 1: 3.7, and the pre-dissolved pulp is obtained after the pulp is swollen; the outlet temperature of the pre-dissolved pulp is 70 °C, composition of pre-dissolved pulp: 10.2 wt% cellulose, pH 9.5. The pre-dissolved slurry enters the dissolving mach...

Embodiment 2

[0094] Add the pulp with a degree of polymerization of 550 until the conductivity is less than 5μs / cm2 , 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; after the activation is terminated, the porridge is vacuum dehydrated After pressing, control the water content of the hydrous cellulose to 53wt%, and crush it into 3cm*3cm particles; then add 7wt% chitin aqueous solution and 85wt% N-methylmorpholine-N-oxide aqueous solution, wherein the The mass ratio of cellulose and chitin aqueous solution is 1: 0.1, the mass ratio of hydrous cellulose and N-methylmorpholine-N-oxide aqueous solution is 1: 3.2, and the pre-dissolved pulp is obtained after the pulp is swollen; the outlet temperature of the pre-dissolved pulp is 68 °C, composition of predissolved pulp: 10.45% cellulose, pH 9.0. The pre-dissolved slurry enters the dissolving machine, a...

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Abstract

The invention discloses solvent-process high wet modulus chitin fibers and a preparation method thereof, and belongs to the field of textiles. The preparation method comprises the steps: (A) activating, to be specific, activating pulp dregs by cellulase to obtain paste; (B) squeezing, to be specific, squeezing and dehydrating the paste to obtain water-containing cellulose; (C) pre-dissolving, to be specific, mixing aqueous cellulose, N-methylmorpholine-N-oxide solution and a chitin solution to obtain a pre-dissolved pulp; (D) dissolving, to be specific, dissolving the pre-dissolved pulp in a dissolving machine to obtain a pulp; and (E) spinning, to be specific, performing spinning on the pulp to obtain the solvent-process high wet modulus chitin fibers. The preparation method has the advantages of good operation simplicity, zero industrial pollution to production, low energy consumption, high safety and suitability for large-scale industrial continuous production. The prepared solvent-process high wet modulus chitin fibers have high wet modulus, contain protein components, and are good in breathability and air permeability, comfortable to wear, soft to touch and favorable for continuous dyeing, are convenient to print and dye and are good for producing high-end fabrics.

Description

technical field [0001] The invention relates to the technical field of textiles, in particular to a solvent-processed high-humidity modulus chitin fiber and a preparation method thereof. Background technique [0002] The development of regenerated cellulose fiber has formed two major categories of products, the first category is viscose fiber, and the second category is solvent-process regenerated cellulose fiber. Viscose fiber has long-term production characteristics such as high energy consumption, high pollution, and complicated processes, so the production scale of viscose fiber has to be controlled, and viscose fiber has disadvantages such as wet modulus, dry strength, and low wet strength. The production process of regenerated cellulose fiber by solvent method uses N-methylmorpholine-N-oxide as the solvent, and some functional materials can also be added to it. There is no chemical reaction in the whole production process, no industrial pollution, low energy consumptio...

Claims

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Application Information

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IPC IPC(8): D01F2/00D01F1/10D01D5/00D01D10/06
CPCD01D5/00D01D10/06D01F1/103D01F2/00
Inventor 王佳欢陆育明李忠杨成周永华王晓亮王辉
Owner SHANGHAI LYOCELL FIBER DEV
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