酶预处理对木质纤维素纳米纤丝性能的影响

Effect of enzymatic pretreatment on the properties of lignocellulose nanofibrils

采用机械法、内切葡聚糖酶预处理/机械法、木聚糖酶预处理/机械法制备得到木质纤维素纳米纤丝,通过分析形态与结构特性探索了酶预处理过程对木质纤维素纳米纤丝性能的影响。结果表明,内切葡聚糖酶/机械法制备的木质纤维素纳米纤丝具有最高的保水值(564%)、最优的比表面积(173.71 m2/g)和最稳定的Zeta电位(-45.43 mV)。内切葡聚糖酶预处理能够疏松木质纤维微观结构,利于后续机械研磨分离出更细小的纤丝。

Lignocellulose nanofibrils were prepared by mechanical method,endoglucanase pretreatment/mechanical method,and xylanase pretreatment/mechanical method,respectively.The effect of enzymatic pretreatment process on the performance of lignocellulose nanofibrils was explored by analyzing their morphological and structural characteristics.The results showed that lignocellulose nanofibrils prepared by endoglucanase pretreatment/mechanical method exhibited the highest water retention value of 564%,the best specific surface area of 173.71 m2/g and the most stable Zeta potential of-45.43 mV.The process of endoglucanase pretreatment could loosen the microstructure of lignocellulosic fibers,which was beneficial to the subsequent mechanical grinding procedure to isolate finer fibrils.