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Explosion and supercritical carbon dioxide fluid combined degumming method for apocynum venetum

A degumming method and supercritical technology, applied in the direction of chemical production of bast fibers, etc., can solve the problems of difficult quality control of a single degumming method, unsatisfactory degumming effect, and large fiber damage, so as to achieve small fiber damage and non-uniformity. Reduced and improved spinnability

Inactive Publication Date: 2014-06-04
姜著川
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Problems solved by technology

[0009] The first object of the present invention is to provide a kind of flash explosion and supercritical degumming process of apocynum for the problems such as serious environmental pollution, large fiber damage, difficult quality control and unsatisfactory degumming effect in a single degumming method. Carbon dioxide fluid combined degumming method

Method used

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Embodiment Construction

[0025] A degumming method combining flash explosion of apocynum and supercritical carbon dioxide fluid. First, flash explosion pretreatment is used. In the state of instantaneous pressure relief, the components in the fiber are separated, and some structures change, and then the supercritical carbon dioxide fluid is used to treat the fiber. Extraction is carried out, and the different components of the fiber are separated by changing the fluid pressure and temperature, which can effectively separate the colloid in the fiber without damaging the cellulose. The method has the advantages of high degumming efficiency, energy saving, environmental protection, and low cost. The degumming process is as follows:

[0026] Apocynum sample → flash explosion pretreatment → washing → supercritical carbon dioxide fluid treatment → fiberizing → washing → dehydration → oiling → dehydration → drying → apocynum fiber

[0027] Above-mentioned degumming process comprises the steps:

[0028] (1)...

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Abstract

The invention relates to an explosion and supercritical carbon dioxide fluid combined degumming method for apocynum venetum, aiming at the problems of severe environment pollution and large fiber damage in a present degumming process of apocynum venetum, and the problems of uneasy control of quality and non-ideal degumming effect in a single degumming method. The method comprises the steps of firstly pre-treating apocynum venetum with explosion under a relatively low temperature and pressure so as to prevent the fiber damage and remove most of colloid structure change; then extracting residual colloid in apocynum venetum by using the supercritical carbon dioxide fluid; and at the same time, degrading partial of lignin in the fibers by using a laccase solution. The method has the characteristics of high degumming efficiency, soft fiber handfeel, good product quality of degummed ramie, and energy conservation and environment protection. Besides, no chemicals are used in the method.

Description

technical field [0001] The invention relates to the technical field of hemp degumming, in particular to a method for degumming Apocynum apocynum by combining flash explosion and supercritical carbon dioxide fluid. Background technique [0002] Apocynum fiber is a kind of bast fiber. It has excellent quality and wearability. Hemp fibers are much thinner than ramie fibers, soft to the touch, and have the luster of natural silk. The most outstanding thing is that apocynum fiber has the effects of lowering blood pressure, relieving asthma, and lowering blood fat due to the medicinal ingredients such as flavonoids, and has antibacterial effect, and the antibacterial rate is still very high after repeated washing. Due to the good ecological adaptability and the unique advantages of its products, the potential development of Apocynum apocynum has attracted the attention of many people from all over the world. [0003] The chemical composition of apocynum and other hemp species is...

Claims

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Application Information

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IPC IPC(8): D01C1/02
Inventor 姜著川
Owner 姜著川
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