安徽农业科学Issue(7)：3840-3841,3848,3.
纤维素微球的分子质量及其分布
Molecular Weight and Its Distribution of Cellulose and Cellulose Microspheres
摘要
Abstract
[Objective] This study aimed to provide basic data for studying the relationship between structure and property of cellulose micro-spheres 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% LiCl/N, N-dimeth-ylacetamide (LiCl/DMAc) was used as the solvent and 0. 5% LiCl/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-averjage molecular weight Mη 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 GPC method were relatively closer to the actual value and could truly reflect the characteristics of molecular weight distribution of cellulose and cellulose microspheres.关键词
纤维素微球/黏度法/凝胶渗透色谱法/分子量/分子量分布Key words
Cellulose microspheres/ Viscosity method/ GPC method/ Molecular weight/ Molecular weight distribution分类
农业科技引用本文复制引用
王则奋,黄科林,王犇,吴睿,陶靖,彭小玉,廖丹葵..纤维素微球的分子质量及其分布[J].安徽农业科学,2012,(7):3840-3841,3848,3.基金项目
广西自然科学基金资助项目(桂科自0991024Z). （桂科自0991024Z）
