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

作　　者：贺礼龙 黄璐瑶 高文花[1] 曾劲松[1] 陈克复[1] HE Lilong;HUANG Luyao;GAO Wenhua;ZENG Jinsong;CHEN Kefu(State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510640, China)

机构地区：[1]华南理工大学制浆造纸工程国家重点实验室,广东广州510640

出　　处：《大连工业大学学报》2021年第4期267-273,共7页Journal of Dalian Polytechnic University

基　　金：国家自然科学基金面上项目(31971603).

摘　　要：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.

关 键 词：木质纤维素纳米纤丝 内切葡聚糖酶 木聚糖酶 

分 类 号：TS721[轻工技术与工程—制浆造纸工程]