Molecular Weight and Distribution of Cellulose and Cellulose Microspheres

作     者：Zefen WANG Kelin HUANG Ben WANG Rui WU Jing TAO Xiaoyu PENG Dankui LIAO 

作者机构：School of Chemistry and Chemical EngineeringGuangxi University Guangxi Branch of China Science and Technology Development Institute Guangxi Research Institute of Chemical Industry Guangxi Hong Yao Xiang Technology Co.Ltd. School of Chemistry and Ecological EngineeringGuangxi University for Nationalities 

出 版 物：《Agricultural Biotechnology》 (农业生物技术（英文版）)

年 卷 期：2012年第1卷第1期

页      面：44-46页

学科分类：081704[工学-应用化学] 07[理学] 08[工学] 0817[工学-化学工程与技术] 070303[理学-有机化学] 0703[理学-化学] 

基　　金：Supported by Natural Science Foundation of Guangxi(0991024Z) 

主　　题：Cellulose microspheres Viscosity method GPC method Molecular weight Molecular weight distribution 

摘      要：[ Objective ] This study aimed to provide basic data for studying the relationship between structure and property of cellulose microspheres by measuring molecular weight of cellulose and cellulose microspheres with viscosity method and gel permeation chromatography （GPC） method. [ Method] In viscosity method, cadmium ethylenediamine was used as the solvent, intrinsic viscosity η of the solution was determined at 25 ℃ by using a Ubbelohde viscometer, to calculate the molecular weight of cellulose; in GPC method, 8% LiC1 / N, N-dimethylacetamide （LiC1/DMAc） was used as the solvent and 0.5% LiC1/DMAc was used as the mobile phase to determine the relative molecular weight and distribution of cellulose and cellulose microspheres. In addition, the determination results were analyzed to compare these two methods. [ Result ] Viscosity-average molecular weight Mr/ of cellulose and cellulose microspheres determined with viscosity method were 224,532 and 16,686, respectively; weight-average molecular weight Mw of cellulose and cellulose microspheres determined with GPC method were 284,196 and 22,345, respectively. [ Conclusion] The determination results of （;PC method are relatively close to the actual value and could truly reflect the characteristics of molecular weialat distribution of eellulose and cellulose mierosr, heres.