Low-temperature dissolving method by adopting cellulose combined raw material and application thereof

Abstract

The invention discloses a low-temperature dissolving method by adopting a cellulose combined raw material and application thereof. The preparation method comprises the following specific steps: 1) mixing at least two cellulose raw materials with different polymerization degrees to obtain a cellulose mixture; 2) putting the cellulose mixture into alkali liquor subjected to cooling treatment, and performing uniform stirring to obtain uniform cellulose pulp porridge; and 3) deeply freezing the cellulose pulp porridge, and then heating and unfreezing to obtain stable cellulose dissolved colloid. According to the invention, the synergistic effect of cellulose with different polymerization degrees is utilized; cellulose with higher polymerization degree is used as a skeleton, and cellulose withlower polymerization degree is used for gap filling, so that the strength of a cellulose regenerated product is improved, the application range of cellulose is expanded, the cost is remarkably reduced, and the cellulose regenerated product can be widely applied to the fields of regenerated cellulose fibers, films, microspheres or hydrogel and the like while high dissolution concentration of cellulose is ensured.

Description

technical field

[0001] The invention relates to the technical field of cellulose processing, in particular to a low-temperature dissolution method using cellulose combined raw materials and its application. Background technique

[0002] The traditional cellulose regeneration production process generally adopts the viscose method. During the dissolution process, a large amount of carbon disulfide is used to sulfonate the cellulose, and then diluted and dissolved with dilute alkali. Sulfur-containing gas is produced during the production process, and a large amount of waste gas and waste water are generated in the post-processing desulfurization production stage of the product, which has caused serious pollution to the environment, and is facing the situation of shutdown or overall relocation.

[0003] In order to solve the pollution problem of cellulose regeneration production, domestic and foreign enterprises and research institutions are actively carrying out research on th...