期刊
BIORESOURCE TECHNOLOGY
卷 127, 期 -, 页码 100-105出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2012.09.133
关键词
Esterified cellulose nanocrystals; Manufacturing; Ultrasonication; Characterization
资金
- Special Scientific Research Fund for Public Service Sectors of Forestry in China [201204801]
- National Natural Science Foundation of China [31170520]
- Project of Fujian Provincial Department of Education [JK2011016]
Esterified cellulose nanocrystals (E-CNCs) are cellulose derivatives that could be applied in biomedical and chemical industries. E-CNCs were prepared with cellulose pulp using a mixture of 17.5 M acetic and 18.4 M sulfuric acid with the aid of ultrasonication. The effects of esterification time (3-7 h), ultrasonication time (with a frequency of 40 kHz, 0 to 6 h) and temperature (68-75 degrees C) on the yield and degree of substitution (DS) of E-CNCs were evaluated. The sample obtained without ultrasonication had the lowest yield and DS value of 48.16% and 0.22, respectively, whereas ultrasonication for 5 h at 70 degrees C resulted in a yield of 85.38% and a DS value of 0.46. Characterization indicated the successful esterification of hydroxyl groups of cellulose, and the width of rod-shaped E-CNCs was from 10 to 100 nm. The study provides a simple and convenient method to manufacture E-CNCs. (C) 2012 Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据