Degumming method of China hemp fibers

Abstract

The invention relates to a degumming method of China hemp fibers. The degumming method comprises the following steps that (1), pre-alkali treatment is carried out on China hemp, and the China hemp is washed with water; (2), anhydrous ferrous sulfate is added and used as a hydrogen peroxide catalyst under a weak acid condition, and the China hemp fibers are further degummed and washed with electricity assistance; and (3), deep degumming and bleaching treatment is carried out on the China hemp fibers by using an alkali-oxygen one-bath method, washing with water and drying are carried out. Compared with a traditional process, the degumming method of the China hemp fibers is more suitable for degumming under a weakly acidic condition, cellulose components in the China hemp are better protected, the quality of the hemp fibers is improved, and the degumming period is shortened at the same time. An electrically-assisted Fenton system is applied to degumming the China hemp fibers, so that compared with the traditional process, the alkali consumption is small, COD value in degumming wastewater is low, the color is shallow, pollution to the environment is small, and environmental protection and sewage treatment are more facilitated.

Description

technical field [0001] The invention belongs to the technical field of textile processing, and in particular relates to an efficient and environment-friendly degumming process for hemp fibers. Background technique [0002] Hemp is widely planted all over the world, which leads to great differences in the elemental composition, chemical composition and crystallinity contained in hemp fibers in different regions and different hemp ages. The surface of hemp fibers contains a large amount of colloid. The existence of hemp fiber makes the hemp fiber thick and hard, and it needs to be degummed before processing and use. After degumming, the residual glue rate and breaking strength of the hemp fiber affect its processing value. Therefore, the degumming process of hemp fiber is the focus of processing. [0003] The traditional hemp degumming process methods include chemical degumming method, physical degumming method and biological enzyme degumming method. Sodium hydroxide is often...

AI Technical Summary

Problems solved by technology

Sodium hydroxide is often used as a treatment agent in chemical degumming, which consumes a lot of alkali, and the degumming wastewater causes great environmental pollution; physical degumming is mainly mechanical degumming. At present, there are methods such as manual scraping, ultrasonic and steam blasting, but they can only remove Part of the gelatin, so it is often used as an auxiliary method; the biological enzyme degumming method uses the specificity and high efficiency of different enzymes to remove the external gelatin of the fiber, and the combined use of multiple enzymes has a better effect, but the biological enzyme degumming method degumming low rate, long time

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