Supercritical carbon dioxide ionic liquid degumming method for apocynum venetum bast fibers

A technology of carbon dioxide and ionic liquids, which is applied in the direction of producing bast fiber by chemical method, can solve the problems of hard to find, easy to pollute the environment, and large cellulose damage, and achieve the effect of fast degumming speed

Active Publication Date: 2015-12-02
晋江国盛新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The microbial degumming method of natural water retting is less costly, but the retting is not complete, and livestock and poultry will also cause plagues after drinking this water
In addition, some harmful gases are produced during the retting process, such as H 2 S and CH 4 etc., causing some pollution to the air environment
The conventional chemical degumming method is to decompose pectin and lignin by soaking in strong acid and scouring with strong alkali at high temperature and high pressure, and then rinse and beat. Due to the soaking and scouring with strong acid and strong alkali and rinsing and beating, the retained cellulose is

Method used

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  • Supercritical carbon dioxide ionic liquid degumming method for apocynum venetum bast fibers
  • Supercritical carbon dioxide ionic liquid degumming method for apocynum venetum bast fibers
  • Supercritical carbon dioxide ionic liquid degumming method for apocynum venetum bast fibers

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Such as image 3 As shown, 2kg apocynum bast fiber is placed in the cage 2, the cage cover 12 is covered, and put into the reactor cylinder 1, the central column 3 of the cage is hollow, and a threaded sleeve 11 and a motor are arranged inside. The threaded connection on the transmission shaft 5 is covered with a shoulder flat cover 13, and the reactor shell 1 is heated by the jacket 9, and carbon dioxide enters the cage center column 3 from the carbon dioxide inlet 4, and the ionic liquid degumming agent (ion Liquid and ethanol mass ratio is the degumming liquid of 5:1) enters in the cage center column 3 by reactant solution inlet 6 at the speed of 0.2kg / min, because the permeation hole that the cage center column evenly arranges, supercritical carbon dioxide and The reactant solution penetrates into the apocynum fiber inside by the permeable hole, and begins to degumming, due to the rotation of the motor drive shaft 5, the cage 2 rotates thereupon, (the effect of the ...

Embodiment 2

[0038] Put 4kg of apocynum bast fiber into the cage 2, cover the cage cover 12, put it into the reactor cylinder 1, the central column 3 of the cage is hollow, and has a threaded sleeve 11 and a motor drive shaft 5 inside The threaded connection on the upper cover is covered with a shoulder flat cover 13, and the reactor cylinder 1 is heated by the jacket 9, and carbon dioxide enters the cage center column 3 from the carbon dioxide inlet 4, and the ionic liquid degumming agent (ionic liquid and ethanol The degumming solution with a mass ratio of 2:1) enters the central column 3 of the cage from the reactant solution inlet 6 at a speed of 0.3kg / min. Due to the uniformly arranged permeation holes in the central column of the cage, supercritical carbon dioxide and the reactant solution Infiltrate into the inside of the apocynum fiber by the permeable hole, start to degumming, due to the rotation of the motor transmission shaft 5, the cage 2 rotates thereupon, (the effect of the ro...

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Abstract

The invention discloses a supercritical carbon dioxide ionic liquid degumming method for apocynum venetum bast fibers. The supercritical carbon dioxide ionic liquid degumming method includes the steps that ionic-liquid and ethyl-alcohol degumming liquid is prepared by 1-butyl-3-methylimidazolium acetate ionic liquid and ethyl alcohol in the mass ratio of 10:1 to 1:1 and placed into a degumming reactant container, processing is carried out for 120 min to 240 min under the conditions that the pressure is 15 MPa to 30 MPa, the temperature is 80 DEG C to 120 DEG C, and a bin cage carries out autorotation at the speed of 30 r/min to 60 r/min, pressure releasing is carried out, and the apocynum venetum fibers are obtained. According to the degumming method, water is avoided, ionic liquid and carbon dioxide generated after using can be recycled, the gumming speed is high, the residual gum rate is lower than 8%, and the level of the existing degumming technology is achieved.

Description

technical field [0001] The invention relates to a method for degumming Apocynum supercritical carbon dioxide. Background technique [0002] Apocynum fiber is known as the "King of Wild Fibers". It has the luster of silk, the crispness of hemp, and has medicinal value, which is unmatched by other textile materials. Moreover, it can be blended with cotton, silk, wool and chemical fibers, or purely spun. The resulting textile has crystal-like luster and silk flexibility, fast moisture absorption and moisture dissipation, and has the characteristics of air permeability and antistatic properties. [0003] To become a spinnable fiber, the harvested apocynum generally undergoes two main processing processes-stripping and degumming. The hemp husk obtained by peeling hemp cannot be directly used for spinning, because the hemp husk contains many colloids and the fibers are surrounded in it. Degumming is the process of removing the gum in the raw hemp to prepare fibers suitable for t...

Claims

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Application Information

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IPC IPC(8): D01C1/02
Inventor 高世会段国裕李敏马丽群郑发忠郑来久郁崇文
Owner 晋江国盛新材料科技有限公司
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