Synthesis and Characterization of High Degree of Substitution Cassava Carboxymethyl Starch
TAN Yi-qiu HUANG Zu-qiang NING ke-liang
Department of Chemistry and Biology, Nanning Normal College School of Chemistry and Chemical Engineering （1. Department of Chemistry and Biology Guangxi Normal University for Nationalities
Abstract：Carboxymethyl starch (CMS) with high degree of substitution (DS) was synthesized by ethanol method, using cassava starch activated for 60 min as material. The process conditions were optimized by orthogonal experiments, the effects of reaction time, reaction temperature, catalyst amount, etherifying agent amount, concentration of ethanol and concentration of starch on DS of CMS were investigated. The results indicated that the optimized conditions for synthesis of high DS cassava CMS were temperature 50℃, concentration of ethanol 90%, reaction time 120 min, molar ratio of ClCH2COOH to starch 0.80, concentration of starch 35%(w) and molar ratio of NaOH to starch 0.80. The value of DS was 1.24 under the synthetic conditions. Furthermore the product was further characterized.
谭义秋 黄祖强 农克良. 高取代度木薯羧甲基淀粉的合成及表征[J]. , 2010, 10(1): 173-178.
TAN Yi-qiu HUANG Zu-qiang NING ke-liang. Synthesis and Characterization of High Degree of Substitution Cassava Carboxymethyl Starch. , 2010, 10(1): 173-178.
2010, Vol. 10 
