摘要
以南方典型植物大王椰、榕树和杧果树为原料提取α-纤维素,用硫酸水解制备了纳米纤维素,并对制备的纳米纤维素的形貌及性能进行了对比。经透射电镜和扫描电镜分析,大王椰、榕树和杧果树纳米纤维素纤维长度分别在50~400、50~350和60~120nm;热重分析结果表明,3种纳米纤维素的热稳定性由高到低顺序为杧果树、大王椰、榕树;红外分析表明,酸水解前后纤维素的化学结构保留完整;X衍射分析仪表明,酸水解前后晶型都保持了纤维素Ⅱ型的晶体结构,而且结晶度指数都有一定程度的增加。
Theα-celluloses extracted from typical southern plant sources of palm sheaths,mango tree and banyan tree were used to prepare nanocelluloses by hydrolyzing with sulfuric acid.The results indicated that the length of nanocelluloses from palm sheaths,banyan tree and mango tree were mainly in range of 50-400,50-350,and 60-120 nm,respectively,and descending order of nanocelluloses thermal stability were as follows：mango tree,palm sheath,banyan tree.The main chemical structure of nanocelluloses andα-celluloses from palm sheaths,mango tree and banyan did not change.X diffraction analysis showed that the crystal structure of cellulose Ⅱ was maintained,and the crystallinity of nanocelluloses increased some extent after amorphous cellulose removed by acid.
作者
徐威宇
付时雨
彭洋洋
刘浩
XU Weiyu FU Shiyu PENG Yangyang LIU Hao(State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510640, China)
出处
《大连工业大学学报》
CAS
北大核心
2016年第5期347-352,共6页
Journal of Dalian Polytechnic University
基金
广东省自然科学基金资助重点项目(2014A030311030)
关键词
纳米纤维素
大王椰
杧果树
榕树
酸水解
nanocelluloses
royal palm residue
banyan tree
mango tree
acid hydrolysis
