Preparation and mechanism analysis of morphology-controlled cellulose nanocrystals via compound enzymatic hydrolysis of eucalyptus pulp

作者：Tong, Xin; Shen, Wenhao^*; Chen, Xiaoquan; Jia, Mengyu; Roux, Jean-Claude

来源：Journal of Applied Polymer Science, 2020, 137(9): 48407.

DOI：10.1002/app.48407

• cellulase
• cellulose nanocrystal
• compound enzymatic hydrolysis
• morphology control
• xylanase

First, making from eucalyptus cellulose fiber, the influences of different compound enzymolysis conditions on the morphology of cellulose nanocrystals (CNCs) were studied. Under the actions of the compound enzyme composed of cellulase and xylanase with the concentration ratio of 9:1, total enzyme concentrations of 10 and 500 U mL(-1) and the hydrolysis time of 12 and 5 h, the rod-like CNCs (length 600 nm, width 30 nm) and the spherical CNCs (40 nm) were obtained, respectively. Subsequently, the crystallinities, chemical structures, and thermal stabilities of the rod-like and spherical CNCs revealed that, the CNCs structures were still similar to those of the eucalyptus cellulose fiber, the thermal decomposition temperatures of the rod-like and spherical CNCs (345, 343 degrees C) were a little lower than that of the eucalyptus cellulose fiber (364 degrees C). Lastly, the control mechanism of CNC morphology by the compound enzymatic hydrolysis was also discussed.

• 单位
  电子科技大学