Preparation method of nano cellulose in high length-to-diameter ratio

Abstract

The invention provides a preparation method of nano cellulose in a high length-to-diameter ratio. The method includes steps: treating lignocelluloses with a complex biological enzyme, beating the treated lignocelluloses into a certain degree of beating by a beating machine, adding an appropriate amount of a dispersing agent or ground minerals into obtained slurry, performing colloid mill circulartreatment, and continuously reducing a mill gap along with increasing of cycle times to obtain the nano cellulose in the high length-to-diameter ratio. Problems of high energy consumption in nano cellulose preparation and agglomeration of the nano cellulose in the high length-to-diameter ratio due to the hydrogen-bond interaction in a preparation process are solved.

Description

technical field [0001] The invention relates to a method for preparing nano-cellulose with high aspect ratio, belonging to the field of biological nanometer materials. Background technique [0002] With the continuous development of social economy, non-renewable resources are increasingly scarce, and environmental pollution and other problems are becoming more and more prominent. Wood fiber, as an abundant renewable resource on the earth, has received more and more attention in the fields of science, medicine, energy, and health. Nanocellulose is a one-dimensional nano-sized cellulose-derived material prepared by chemical, physical or biological methods using fiber materials as raw materials. It is biodegradable, biocompatible, large specific surface area, and excellent mechanical properties. With many excellent properties, it can be used in medicine, packaging, papermaking, food additives, paint coatings, flooring, building materials and other fields. [0003] As an emergi...

AI Technical Summary

Problems solved by technology

The process is simple and easy to operate, but special equipment is required, the energy consumption is relatively high, and the particle size distribution of the prepared nanocellulose is wide. In addition, problems such as homogenizer blockage are prone to occur, and the continuous preparation process cannot be realized.

The preparation of nanocellulose by biological method is complicated, time-consuming and costly. Although there are many researches at home and abroad, it has not been widely used.