Cellulose esters from waste cotton fabric via conventional and microwave heating

被引：59
|
作者：
Ratanakamnuan, Usarat [1 ]
Atong, Duangduen [2 ]
Aht-Ong, Duangdao [1 ,3 ]
机构：
[1] Chulalongkorn Univ, Dept Mat Sci, Fac Sci, Bangkok 10330, Thailand
[2] Natl Met & Mat Technol Ctr, Pathum Thani 12120, Thailand
[3] Chulalongkorn Univ, Natl Ctr Petr Petrochem & Adv Mat, Bangkok 10330, Thailand
来源：
CARBOHYDRATE POLYMERS | 2012年 / 87卷 / 01期
关键词：
Cellulose; Modified-cellulose; Cotton; Esterification; Microwave; Biodegradable; HOMOGENEOUS ESTERIFICATION; MECHANICAL-PROPERTIES; PLASTIC FILMS; FATTY-ACIDS; ACYLATION; DERIVATIVES; HEMICELLULOSES; ACETYLATION; FIBERS; BRAN;
D O I：
10.1016/j.carbpol.2011.07.016
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
The esterification of cellulose from waste cotton fabric in a N,N-dimethylacetamide/lithium chloride solvent system was carried out using different types of fatty acid chloride including butyryl chloride, capryloyl chloride, and lauroyl chloride as esterifying agents, and N,N-dimethyl 1-4-aminopyridine as a catalyst under conventional and microwave activation. Microwave esterification was performed under 2.45 GHz with power varying from 90 to 450W. The optimum conditions for esterification of cotton cellulose with various esterifying agents were investigated in terms of reaction time and temperature to attain appropriate %weight increase and degree of substitution of esterified-cellulose. The degree of substitution, functional group and chemical structure, and thermal stability of cellulose ester powder were characterized by H-1 NMR, FTIR, and TGA/SDTA analysis. Morphologies, crystallinity, and solubility of modified cellulose by two different heating methods were compared. (C) 2011 Elsevier Ltd. All rights reserved.
引用
收藏
页码：84 / 94
页数：11
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