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A kind of hemp fiber cryogenic-mechanical combined degumming treatment method

A treatment method, cryogenic treatment technology, applied in mechanical treatment, fiber treatment, textiles and papermaking, etc., can solve problems such as incomplete degumming, environmental pollution, and long preparation process of bacteria agents

Active Publication Date: 2018-09-11
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Now degumming generally adopts mechanical degumming, chemical degumming, biological degumming and other methods. Mechanical degumming has incomplete degumming, but chemical degumming has the disadvantages of consuming a large amount of chemical reagents and energy and causing serious environmental pollution. Environmental pollution is serious, and biological degumming also has process technology. Complicated, long preparation process of bacterial agents, high cost of enzyme preparations, inability to get rid of the side effects of chemical methods, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] For the pretreatment of the hemp fiber, use the general washing method to remove the general impurities, and then dry it for use; then put the pretreated hemp fiber in the cryogenic equipment, quickly cool it to -190°C, and freeze it for 5 hours; then heat up to room temperature at a rate of 10°C / min, and let it stand for 2 hours; then place the cryogenically treated hemp fiber on a mechanical degumming device for mechanical beating degumming; the hemp fiber after mechanical degumming The fiber is washed in 6g / liter of sodium hydroxide liquid to remove the non-cellulose remaining on the surface of the hemp fiber after mechanical degumming; finally, it is dried and combed for later use. The residual glue rate of the treated hemp fiber is kept below 1%.

Embodiment 2

[0016] For the pretreatment of jute fiber, the method of general washing is used to remove general impurities, and then dried for use; then the pretreated jute fiber is placed in a cryogenic equipment, rapidly cooled to -150 ° C, and the freezing time is 3 hours; Then heat up to normal temperature with the speed of 8 ℃ / min, and stand still for 3 hours; Put the jute fiber that cryogenic treatment is over on the mechanical degumming equipment to carry out the degumming of mechanical beating mode; After the jute fiber after mechanical mode degumming, place Wash in 6g / liter of sodium hydroxide liquid to remove the non-cellulose remaining on the surface of the hemp fiber after mechanical degumming; finally, dry and comb for later use. The residual glue rate of the treated jute fiber is kept below 0.5%.

Embodiment 3

[0018] For the pre-treatment of ramie fibers, the common impurities are removed by washing with water, and then dried for use; then the pre-treated ramie fibers are placed in a cryogenic device, rapidly cooled to -100°C, and frozen for 12 hours; Then heat up to normal temperature at a speed of 5°C / min, and let it stand for 1 hour; then place the cryogenically treated ramie fiber on a mechanical degumming device for degumming by mechanical beating; the ramie fiber after mechanical degumming is placed Wash in 6g / liter of sodium hydroxide liquid to remove the non-cellulose remaining on the surface of the hemp fiber after mechanical degumming; finally, dry and comb for later use. The residual glue rate of the treated ramie fiber is kept below 1%.

[0019] After several experiments, according to the experimental results, it was found that freezing time of more than 30 minutes during cryogenic treatment can reduce the residual glue rate in the fiber. Hemp fiber, jute fiber, flax fi...

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PUM

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Abstract

The invention discloses a fibrilia cryogenic-machinery combined degumming processing method. The method comprises: after preprocessing, performing cryogenic treatment on hemp fibers, rapidly heating to normal temperature status, and degumming in a mechanical beating method, performing water processing, and drying for standby application. Processing of pectin and hemicellulose and other impurities makes the hemp fibers treated by the process satisfy to be used as a fiber reinforced base, and in use, VOC emission reaches national requirement, and the hemp fiber also reaches requirement of being used for weaving. Processing the fibrilia by the method improves usability of fibers, and sewage discharge is little, and the method is an efficient environmentally-friendly process. The fibrilia made by the method is good in fiber quality, and fiber surface is concave-convex and is beneficial for combining with an interface of a matrix. The fibrilia is good in degumming effect and wide in purposes, and can be widely used for fiber-reinforced-based fibers, and can be used for spinning industry. The method has good application prospect.

Description

technical field [0001] The invention belongs to the technical field of hemp fiber processing. technical background [0002] As a polymer reinforcement matrix, hemp fiber has a wide range of applications and development prospects. Hemp fiber is characterized by the presence of a large amount of hemicellulose, pectin and lignin, which cannot be used as a fiber reinforcement base without the necessary degumming treatment. Now degumming generally adopts mechanical degumming, chemical degumming, biological degumming and other methods. Mechanical degumming has incomplete degumming, but chemical degumming has the disadvantages of consuming a large amount of chemical reagents and energy and causing serious environmental pollution. Environmental pollution is serious, and biological degumming also has process technology. Complexity, long preparation process of bacterial agents, high cost of enzyme preparations, and inability to get rid of the side effects of chemical methods. At pre...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01B9/00
CPCD01B9/00
Inventor 李志刚韩洪江刘雪强徐进马品奎
Owner JILIN UNIV
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