Method for degrading cellulose by synergic action of mechanical activation and metal salt

Abstract

The invention discloses a method for degrading cellulose by synergic action of mechanical activation and a metal salt, belonging to the field of biomass energy and fiber chemicals. The method comprises the following steps: (1) crushing cellulose which serves as a raw material, and screening with a screen of 10-200mesh; (2) mixing the crushed and screened cellulose with a metal salt at a weight ratio of 1:(0.001-0.1) uniformly; and (3) adding the materials mixed uniformly into a mechanical activation reactor, adjusting the mechanical activation temperature to 30-90 DEG C, activating the materials mechanically for 10-180 minutes, and taking the obtained cellulose degradation product out of the mechanical activation reactor. Because the cellulose is degraded by synergic action of mechanical activation and the metal salt, the degree of polymerization of the cellulose can be reduced greatly in a mild condition, the accessibility and the reaction activity of the cellulose degradation product can be improved greatly, and hydrolysis and modification reaction of cellulose can be realized. Little energy is consumed in the whole reaction process, the process for degrading cellulose is simple, the production cycle is short, the cellulose is degraded only under the mechanical force of a ball mill, and the requirement for production equipment is low.

Description

technical field [0001] The invention belongs to the field of biomass energy and fiber chemicals, and in particular relates to a method for mechanically activating and coordinating metal salts to degrade cellulose. Background technique [0002] Cellulose is mainly synthesized by plants through photosynthesis, and is an inexhaustible and renewable resource in nature. Cellulose has good biodegradability, biocompatibility, stability and special mechanical properties, and has the characteristics of non-toxic, harmless, cheap and huge output. In recent years, with the decline of oil and coal reserves and the rapid increase of oil prices, as countries pay more and more attention to environmental pollution, cellulose is considered to be the most likely green biological resource to replace oil. Synthesizing biomass energy and bio-based chemicals starting from cellulose, gradually establishing a bio-refining economic model, combined with petroleum refining, and realizing the integrat...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method for mechanically activating and synergistically degrading cellulose with metal salts, which can overcome the complex process, high energy consumption, easy to cause environmental pollution, long production cycle and high equipment requirements in the production process existing in the existing cellulose degradation technology. Insufficient, to achieve the purpose of shortening the pretreatment time but effectively reducing the degree of polymerization (Degree of Polymerization, DP) of cellulose