Method for modifying cellulose and derivatives thereof

Abstract

The invention relates to a graft modification method of cellulose and derivatives thereof. According to the method, other monomers are initiated to perform graft modification in the presence of a catalyst by utilizing hydroxyls on the surfaces of the cellulose and derivatives thereof. The graft modification is performed in a nitrogen atmosphere, the reaction temperature is 30-100 DEG C, the reaction time is 0.5-48 hours, and the modified cellulose-based material is obtained after the reaction is finished. A filter tip rod produced by adding the modified graft polymer into a cigarette filter has an obvious smoke adsorption effect, harmful ingredients in the smoke can be selectively retained, and the comprehensive performance is excellent. The used raw materials are low in cost, the process method is simple, the reaction system can be repeatedly used, the energy consumption is low, the preparation cost is reduced, and the method has good market application prospects and is an important method for industrial conversion and utilization of the cellulose and derivatives thereof.

Description

technical field [0001] The invention relates to the technical field of preparation of modified cellulose and cellulose derivatives, in particular to a graft modification method of cellulose and cellulose derivatives. Background technique [0002] In recent years, with the increasingly serious white pollution problem and people's increasing emphasis on environmental protection, the development of fully biodegradable materials has gradually become a hot trend in scientific development. Cellulose is widely derived from trees, cotton, hemp plants and other agricultural by-products, and is an inexhaustible renewable resource in nature. At the same time, it can be completely degraded by microorganisms or bacteria in the natural environment, and it is an environmentally friendly polymer material. However, there are a large number of hydrogen bonds in and between the molecules of cellulose, so it is insoluble and difficult to melt, which limits its processing and application, so it...

AI Technical Summary

Problems solved by technology

However, there are a large number of hydrogen bonds in and between the molecules of cellulose, so it is insoluble and difficult to melt, which limits its processing and application, so it is necessary to derivatize cellulose

[0003] The cellulose derivatives that have been industrialized at present include cellulose acetate (CA), cellulose acetate propionate (CAP), cellulose acetate butyrate (CAB), etc., but due to the operation between their melting temperature and degradation temperature The window is too small, and the industrial application of cellulose derivatives is still dominated by solution molding

In some special applications that require melt processing, a large amount of small-molecule plasticizers need to be added, and these small-molecule plasticizers have problems such as leakage and pollution during use