Method for preparing cellulose microfibril film from wheat straw

Abstract

The invention relates to a method for preparing cellulose microfibril and a film thereof from wheat straw. The method comprises the following steps: screening wheat straw fiber slurry; carrying out enzyme hydrolysis bleaching on wheat straw fibers; carrying out high-pressure homogenization treatment and preparing cellulose microfibrils; and preparing the cellulose microfibril film. According to the preparation method, the bleached wheat straw fiber is taken as a raw material, and the cellulose microfibril is prepared by combining enzyme pretreatment with a high-pressure homogenization method, so that the surface morphology and pore structure of the cell wall of the wheat straw fiber are changed, the preparation process of the cellulose microfibril is further optimized, and the improvement of hydrophilicity, mechanical properties, transparency and other properties of the cellulose microfibril is promoted; therefore, the cellulose microfibril (CMF) film with ideal performance is prepared by a low-energy-consumption and low-cost method, further market development and utilization of the cellulose microfibril (CMF) are greatly promoted, and agricultural comprehensive utilization benefits are improved.

Description

technical field [0001] The invention relates to a method for preparing cellulose microfibrils and films thereof from wheat straw, which belongs to the technical field of pulping and papermaking. Specifically, cellulose microfibrils (CMF) are prepared by using enzyme pretreatment combined with a high-pressure homogenization method, and the cellulose Microfibrils (CMF) are used for film fabrication. Background technique [0002] As we all know, plant cellulose is a renewable and biodegradable green polymer material with extremely abundant reserves on the earth. It can be mainly used in the fields of pulp and paper, textile and fine chemicals. In recent decades, in order to cope with the increasingly serious resource and energy crisis, and fully tap the excellent performance and potential application value of plant fiber, the development and utilization of new products using plant cellulose as raw materials has become a research hotspot for domestic and foreign researchers. . ...

AI Technical Summary

Problems solved by technology

[0004] my country is a large agricultural country with a high total amount of straw, but most of the crop straw in the countryside is directly burned and returned to the field. The comprehensive utilization technology is backward, and the utilization rate in fine processing is very low, which seriously wastes the potential value of straw and makes Rural economic returns are low

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