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Method for dissolving and processing wood/cotton bamboo hemp fibre by employing ionic liquid

An ionic liquid, hemp fiber technology, applied in cellulose/protein conjugated rayon, wet spinning, stretch spinning, etc., can solve problems such as no antibacterial, bacteriostatic, and deodorant functions, low fiber strength, and environmental pollution. , to achieve the effects of environmental protection and operator health, strong air permeability and good hygroscopic performance

Inactive Publication Date: 2008-07-23
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a method for dissolving and processing wood / cotton, bamboo and hemp fibers using ionic liquids, so as to solve the environmental pollution problems caused by the production of cellulose fibers by the viscose method at present, and to expand the source of raw materials for cellulose fibers , solves the problem of high cost, and at the same time integrates the different fiber characteristics of various raw materials such as cotton / wood, bamboo, and hemp, overcomes the antibacterial, antibacterial, and deodorizing functions that wood / cotton pulp does not have alone, and also overcomes the use of hemp alone Low fiber strength and poor whiteness of pulp and bamboo pulp

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] 2 parts of high-polymerization wood / cotton pulp, 4 parts of low-polymerization wood / cotton pulp, 1 part of bamboo pulp, 3 parts of hemp, 90 parts of [BMIM]Cl(1-butyl-3-methyl Base-imidazole hydrochloride) ionic liquid was mixed evenly, and stirred at 45° C. for 24 hours to obtain a spinning solution.

[0024] 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

[0026] 2 parts of pulverized wood / cotton pulp with a low degree of polymerization, 4 parts of wood / cotton pulp with a high degree of polymerization, 1 part of bamboo pulp, 1 part of hemp, 20 parts of [BMIM]Cl (1-butyl-3-methyl Base-imidazole hydrochloride) ionic liquid was mixed evenly, and stirred at 100° C. for 120 hours to obtain a spinning solution.

[0027] 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

[0029] 2 parts of high-polymerized wood / cotton pulp, 4 parts of low-polymerized wood / cotton pulp, 1 part of bamboo pulp, 6 parts of hemp, 100 parts of [AMIM]Cl(1-allyl-3- Methylimidazole hydrochloride) ionic liquid was mixed evenly, and stirred at 60° C. for 80 hours to obtain a spinning solution.

[0030] 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 dissolving and processing method for wood, cotton, bamboo and hemp fiber with ionic liquid, which is characterized in that: (1) the pulverized wood or the pulverized cotton, the pulverized bamboo and the pulverized bast pulp are uniformly mixed with the ionic liquid; the spinning solution of the total solid content of 3 to 40% is formed through dissolving and deaerating for 1 to 120 hours at 35 to 160 degrees centigrade; wherein the weight ratio of the wood or the cotton, the bamboo and the bast is 30 to 80% : 7 to 60% : 10 to 60% ; (2) the spinning and the concreting bathing solidification are carried out after being filtered and deaerated; (3) the oiling and the drying process are carried out after being pulled, rinsed and bleached, so as to obtain a composite fiber. The dissolving and processing method for wood, cotton, bamboo and hemp fiber with ionic liquid has the advantages that: due to use the ionic liquid, the productivity is high, the recovery is easy, the requirement of the green production is satisfied and the prepared composite fiber has good mechanical strength; simultaneously the different fiber characteristics of a plurality of materials such as the wood or the cotton, the bamboo and the bast are synthesized; the source of the material is wide; the cost is low; and the advantages of various natural celluloses can be synthesized according to the requirement.

Description

technical field [0001] The invention belongs to the field of composite fiber preparation, in particular to a method for dissolving and processing wood / cotton bamboo hemp fiber by using ionic liquid. Background technique [0002] With the progress of society and the improvement of people's living standards, people's requirements for textile clothing have shifted from traditional covering, cold protection, and durability to the pursuit of comfort, casualness, novelty and beauty, highlighting the ecological and fashionable nature of clothing, and emphasizing the functions of textile clothing. sex. Fashion, ecology and function have become the main theme of today's textile and garment industry. [0003] Regenerated cellulose fiber is made from cellulose through processes such as dissolution and spinning, and has good hygroscopicity, dyeability and antistatic properties. At the same time, the raw materials for pulp, which is a semi-finished product of regenerated cellulose fibe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01D1/02D01D1/10D01D5/06D01D5/12D02J1/22D01F8/02
Inventor 何春菊王庆瑞孙俊芬陈雪英
Owner DONGHUA UNIV
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