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Method for dissolving and processing hemp fibre by employing ionic liquid

An ionic liquid, bamboo fiber technology, applied in wet spinning, stretch spinning, spinning solution preparation and other directions, can solve problems such as environmental pollution, achieve a wide area, good mechanical strength, low energy consumption and operating costs Effect

Inactive Publication Date: 2008-07-30
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide a method for dissolving and processing bamboo and hemp fibers using ionic liquids, utilizing the different fiber characteristics of bamboo and hemp fibers and using them as a kind of natural cellulose, which can be dissolved in a common solvent for processing to achieve ecological safety Production, to solve the environmental pollution problems caused by the production of cellulose fibers by the viscose method at present, and to meet the production needs

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Mix 9 parts of crushed bamboo pulp, 1 part of kenaf, and 90 parts of [BMIM]Cl (1-butyl-3-methylimidazole hydrochloride) ionic liquid evenly, and stir at 45°C for 24 hours to obtain spinning silk solution.

[0026] After the spinning solution is filtered and defoamed, it enters a coagulation bath containing 5% ionic liquid through a porous spinneret, and the temperature of the coagulation bath is 25°C. After 10% stretching, then through programs such as washing, bleaching, oiling, drying, etc., the spinning speed is 5 m / min to obtain fibers with a strength of 3.2 cN / dtex.

Embodiment 2

[0028] 1 part of crushed bamboo pulp, 1 part of jute, 6 parts of [C 2 Mix MIM]Cl (1-ethyl-3-methylimidazole hydrochloride) ionic liquid evenly, and stir at 100° C. for 120 hours to obtain a spinning solution.

[0029] After the spinning solution is filtered and defoamed, it enters the water coagulation bath through the porous spinneret, and the temperature of the coagulation bath is 15°C. After 3% stretching, then through programs such as washing, bleaching, oiling and drying, the spinning speed is 20 m / min to obtain a fiber with a strength of 3.5 cN / dtex.

Embodiment 3

[0031] Mix 1 part of crushed bamboo pulp, 4 parts of kenaf, 5 parts of jute, and 30 parts of [AMIM]Cl (1-allyl-3-methylimidazole hydrochloride) ionic liquid, and stir at 60 ° C After 80 hours, a spinning solution was obtained.

[0032] After the spinning solution is filtered and defoamed, it enters a coagulation bath containing 25% ionic liquid through a porous spinneret, and the temperature of the coagulation bath is 55°C. After 8% plasticizing and stretching, then through procedures such as washing, bleaching, oiling, and drying, the spinning speed is 30 m / min, and the fiber with a strength of 4.0 cN / dtex is obtained.

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Abstract

The invention relates to a method of dissolving and processing a bamboo-hemp fibre by adopting an ionic liquid. The method has the following steps: firstly, the comminuted pulp of bamboo and hemp is well mixed with an ironic liquid, dissolved at a temperature of 35 to 160 DEG C, deaerated for 1 to 120 hours, and a homogeneous and stable spinning solution with a total solid content of 3 to 50 percent is formed, wherein, the mass ratio of bamboo and hemp is 1-99 percent to 99-1 percent; secondly, the spinning solution is filtered, deaerated, spinned and solidified through a coagulation bath; and thirdly, a bamboo-hemp blended composite fibre is obtained after the procedures of stretching, water cleaning, bleaching, oiling and drying. The ironic liquid used in the invention has high production efficiency, is easy for callback and conforms to the requirement of a green production. The prepared composite fibre has excellent mechanical strength and mechanical property and the fabric made of the composite fibre has the advantages of excellent hygroscopic property, strong ventilation property, soft handfeel, excellent fabric drapability, easy variegation and powerful bacterium resistance. Simultaneously, the prepared composite fibre provides a material used in the departments of medicine and health.

Description

technical field [0001] The invention belongs to the field of preparation of bamboo and hemp blended fibers, in particular to a method for dissolving and processing bamboo and hemp fibers by using ionic liquid. Background technique [0002] Of all organic matter in nature, cellulose not only has the largest reserves, but also has enormous recoveries (billions of tons of natural output per year). Only very little cellulose is currently made into fibers. The amount of cellulose used to make fibers and films is less than 4% of the world's industrially produced cellulose. [0003] With the continuous deepening of human understanding of nature and the increasing shortage of resources such as oil, coal, and natural gas, the development of synthetic fibers will be limited, and the utilization of cellulose will gradually expand. Since cellulose fiber can be converted into water vapor and carbon dioxide by biodegradation or safe combustion, the cellulose fiber causes less environmen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01D1/02D01D1/10D01D5/06D01D5/12D02J1/22
Inventor 何春菊王庆瑞陈雪英孙俊芬
Owner DONGHUA UNIV
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