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A kind of method that takes bamboo as raw material to prepare lyocell fiber

A bamboo fiber and fiber technology, which is applied in the field of preparing lyocell fiber, can solve the problems of high cost, poor quality, immature development of bamboo lyocell fiber, etc., and achieve the goals of less environmental pollution, short growth cycle, and increased economic value Effect

Active Publication Date: 2020-12-11
WUHAN TEXTILE UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main raw material of lyocell fiber is cellulose, in order to obtain high-quality bamboo lyocell fiber, pectin, lignin and hemicellulose must be removed, otherwise, the quality of bamboo lyocell fiber will be poor , which will lead to higher cost and lower quality
Therefore, the development of bamboo lyocell fiber in the market is still immature

Method used

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  • A kind of method that takes bamboo as raw material to prepare lyocell fiber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] (1) Cleaning: take 2000 grams of raw bamboo, saw the raw bamboo, and saw it into irregular small pieces of raw bamboo. The length is 1-2 cm. The small piece of raw bamboo after sawing is cleaned with warm water, and a cleaning agent (water-based cleaning agent, produced by Shenzhen Yuanan Technology Co., Ltd.) is added. The amount of cleaning agent accounts for 0.01% of the small piece of raw bamboo, and the quality of the small piece of raw bamboo (g ) to the volume of the cleaning agent aqueous solution (mL) is 1:100, and rinse with tap water repeatedly after cleaning.

[0027] (2) Degumming of bamboo raw fibers: put the bamboo raw fibers treated in step (1) into pectinase with a mass concentration of 3 g / L, the treatment temperature is 50° C., and the enzyme action time is 48 hours.

[0028] (3) Removal of lignin: immerse the bamboo fiber treated in step (2) into 2g / L sodium hypochlorite solution, set the solution temperature to 40°C, the immersion time to be 2 hour...

Embodiment 2

[0038](1) Cleaning: Take 2000 grams of raw bamboo, saw the raw bamboo, and saw it into irregular small pieces of raw bamboo. The length is 4-5 cm. The small piece of raw bamboo after sawing is cleaned with warm water, and a cleaning agent (water-based cleaning agent, produced by Shenzhen Yuan'an Technology Co., Ltd.) is added. The amount of cleaning agent accounts for 0.05% of the small piece of raw bamboo, and the quality of the small piece of raw bamboo (g ) to the volume of the cleaning agent aqueous solution (mL) is 1:150, and rinse with tap water repeatedly after cleaning.

[0039] (2) Degumming of bamboo fiber: put the bamboo fiber treated in step (1) into pectinase with a mass concentration of 4 g / L, the treatment temperature is 60° C., and the enzyme action time is 48 hours.

[0040] (3) Removal of lignin: immerse the bamboo fiber treated in step (2) into 3g / L sodium hypochlorite solution, set the solution temperature to 45°C, the immersion time to be 2.5 hours, and t...

Embodiment 3

[0050] (1) Cleaning: take 2000 grams of raw bamboo, saw the raw bamboo, and saw it into irregular small pieces of raw bamboo. The length is 3-4 cm. The small piece of raw bamboo after sawing is cleaned with warm water, and a cleaning agent (water-based cleaning agent, produced by Shenzhen Yuanan Technology Co., Ltd.) is added. The amount of cleaning agent accounts for 0.06% of the small piece of raw bamboo, and the quality of the small piece of raw bamboo (g ) to the volume of the cleaning agent aqueous solution (mL) is 1:140, and rinse with tap water repeatedly after cleaning.

[0051] (2) Degumming of bamboo fiber: put the bamboo fiber treated in step (1) into pectinase with a mass concentration of 4 g / L, the treatment temperature is 55° C., and the enzyme action time is 40 hours.

[0052] (3) Removal of lignin: immerse the bamboo fiber treated in step (2) into 2.5g / L sodium hypochlorite solution, set the solution temperature to 45°C, the immersion time to be 2.5 hours, and...

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Abstract

The invention relates to a method of preparing Lyocell by taking bamboos as a raw material. The method comprises the following steps: by taking bamboos as the raw material, extracting cellulose from the bamboos by means of process methods such as degumming, lignin removal, and hemicelluloses removal and the like, and then dissolving bamboo cellulose in an N-methylmorpholine-N-oxide aqueous solution to prepare a spinning solution; feeding the spinning solution into a spinning system, vertically stretching sprayed silk yarns in air, and feeding the silk yarns to a condensing bath to be condensedto fibers; and preparing the Lyocell from the fibers through the processes such as alcohol washing, bleaching, washing, oiling and drying. The dry breaking strength of the Lyocell prepared by the method is between 44 cN / tex and 47 cN / tex, the dry elongation at break thereof is between 13% and 15%, the wet breaking strength thereof is between 29 cN / tex and 32 cN / tex, the wet elongation at break thereof is between 15% and 17%, and the strong performance thereof is close to that of purchased Lyocell.

Description

technical field [0001] The invention belongs to the technical field of lyocell fibers, and in particular relates to a method for preparing lyocell fibers from bamboo. Background technique [0002] Bamboo is a characteristic resource in China, and the use of bamboo in the textile field is a new bamboo application direction that has developed rapidly in recent years. Bamboo fiber textiles are soft to the touch, cool and breathable. Bamboo fiber can be spun purely or blended with other fibers to make a variety of products such as towels, T-shirts and socks. [0003] Lyocell fiber is a kind of regenerated cellulose fiber produced by a new solvent method, that is, using N-methylmorpholine-N-oxide (abbreviation: NMMO) as a solvent to directly dissolve spinning pulp, dry spraying, Regenerated cellulose fibers prepared by wet spinning and spinning processes. Lyocell fiber has excellent mechanical properties and has the advantages of other fibers, such as: the comfort of cotton fib...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F2/00D01F11/02D01D5/06D21C5/00
CPCD01D5/06D01F2/00D01F11/02D21C5/005
Inventor 彭雄义殷国益董雄伟蔡映杰王强夏明桂
Owner WUHAN TEXTILE UNIV
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