Method for preparing viscose fibers through ultrasonic depolymerization of bamboo and bombax composite pulp

Abstract

The invention provides a method for preparing viscose fibers through ultrasonic depolymerization of bamboo and bombax composite pulp, which is a method for producing the viscose fibers from bamboo and bombax mixed slurry through depolymerization in an ultrasonic depolymerization tube. In the method, a traditional reaction kettle is replaced by the ultrasonic depolymerization tube, and the method comprises the following steps of: performing alkali steeping on the bamboo and bombax pulp to obtain slurry; depolymerizing the slurry under the action of an ultrasonoscope; and pressing to obtain alkaline fibers, and finally preparing the viscose fibers from the alkaline fibers. The method overcomes the defects in the prior art, the depolymerization is more uniform, the energy consumption is low,a few pieces of equipment are used, the occupied space is small and the product quality is stable. Moreover, the ultrasonic polymer depolymerization is applied to production of the viscose fibers forthe first time, and a depolymerization method for the production of the viscose fibers through depolymerization is increased.

Description

technical field [0001] The invention belongs to the field of viscose fiber production, and relates to a method for producing viscose fiber with bamboo kapok composite pulp, specifically a method for producing fiber viscose fiber with bamboo kapok composite pulp by applying an ultrasonic depolymerization method. technical background [0002] The depolymerization of cellulose (reducing the degree of polymerization) is an indispensable process step in the production of viscose. Only by reducing the depolymerization of plant cellulose to a certain extent can the production requirements of subsequent viscose fibers be met, and the uniformity of depolymerization in it And the degree of depolymerization is the key to depolymerization of cellulose. [0003] The reduction methods of cellulose for preparing viscose include: aerobic reduction and alkali reduction. In actual application, aerobic polymerization is the main method, while alkaline polymerization requires relatively high t...

AI Technical Summary

Problems solved by technology

[0007] 1. Uneven depolymerization: Due to the large volume of the reactor and many dead spots in the stirring, the stirring is uneven; and the addition of oxygen cannot evenly penetrate into the porridge to participate in the reaction, which eventually leads to uneven depolymerization;

[0008] 2. The reaction kettle occupies a large area, and requires compressed air and high temperature environment, which makes the whole viscose fiber production process become huge, time-consuming, with many equipments and large workshop area, which is not convenient for production management;

[0009] 3. The work of the reactor requires compressed air and steam, which consumes a lot of energy

[0010] 4. The reaction in the reaction kettle is under high temperature, aerobic and stirring conditions. There are many process control points and difficult control, resulting in unstable product quality.

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