Cellulose residue obtained from the CNC production process led to a high enzymatic hydrolysis rate of up to 89.1%, which was twice as high as that of the raw material.
A partial dissolution/regeneration/ultrasonic dispersion mechanism was proposed for this CNC preparation process. The characterization results confirmed that the present method produced a nonderivative form of cellulose and changed its crystalline structure to varying degrees, and CNC exhibited thermal stability comparable to that of the raw materials. CNC with a mixed crystal form of cellulose I and cellulose II was successfully prepared through the partial dissolution of cellulose in an aqueous tetrabutylphosphonium hydroxide (TBPH) solution under mild conditions followed by regeneration, short-term ultrasonic dispersion, resulting in a high CNC yield of up to 72.2%, high crystallinity of up to 72.1%, and tunable dimensions and crystal structure of CNC.
Herein, a comprehensive utilization strategy of cellulose is implemented by facile, high-yield, controllable CNC preparation and effective enzymatic hydrolysis of the cellulosic residue. However, how to facilely and efficiently prepare CNC and utilize the cellulosic raw materials comprehensively are still major challenges. Cellulose nanocrystals (CNC) have attracted great attention due to their excellent physical properties, abundant functional groups, and extensive use in many fields.
0 kommentar(er)
