Cellulose acetates from linters and sisal: Correlation between synthesis conditions in DMAc/LiCl and product properties

被引：55
作者：
Ass, Beatriz A. P. [1 ]
Ciacco, Gabriela T. [1 ]
Frollini, Elisabete [1 ]
机构：
[1] Univ Sao Paulo, Inst Quim Sao Carlos, BR-13560970 Sao Carlos, SP, Brazil
来源：
BIORESOURCE TECHNOLOGY | 2006年 / 97卷 / 14期
基金：
巴西圣保罗研究基金会;
关键词：
linters; sisal; cellulose; cellulose acetate; DMAc/LiCl; size exclusion chromatography (SEC);
D O I：
10.1016/j.biortech.2005.10.009
中图分类号：
S2 [农业工程];
学科分类号：
0828 ;
摘要：
We report the acetylation of celluloses from sisal (untreated and alkali treated) and cotton linters (alkali treated), under homogeneous solution conditions, using DMAc/LiCl as solvent system. Our target was to evaluate the effects of cellulose dissolution and reactions conditions on the product properties. The products were characterized in terms of degree of substitution (DS) by H-1 NMR, and molar weight distribution (MWD) by size exclusion chromatography. Changes in the DS of the products were correlated with reaction conditions and solution properties. It was found that the dissolution of celluloses and degree of substitution of cellulose derivatives depends on a fine adjustment of the dissolution/derivatization conditions, as well as on the origin (sisal or linters) of celluloses. (c) 2005 Elsevier Ltd. All rights reserved.
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收藏
页码：1696 / 1702
页数：7
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