Synthesis and Surface-Active Properties of Carboxymethylcellulose Esters Obtained by Microwave Assisted Transesterification of Vinyl Laurate
Synthesis and Surface-Active Properties of Carboxymethylcellulose Esters Obtained by Microwave Assisted Transesterification of Vinyl Laurate作者机构：Faculty of Industrial Technologies Trend.in University of Alexander Dubdek I. Krasku 491/30 Pfichov 020 01 Slovakia Institute of Chemistry Slovak Academy of Sciences Dubravska cesta 9 Bratislava 845 38 Slovakia
出 版 物：《Journal of Life Sciences》 (生命科学（英文版）)
年 卷 期：2011年第5卷第1期
页 面：74-80页
学科分类：081702[工学-化学工艺] 08[工学] 0817[工学-化学工程与技术] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学]
主 题：Carboxymethylcellulose transesterification microwave radiation surface-active properties.
摘 要：Polymeric biosurfactants were prepared by the transesterification reaction between vinyl laurate （VILA） and carboxymethylcellulose （CMC）. The reaction was performed in two different reaction media （（A） DMF/pTSA and （B） DMF/K2CO3） at various reaction conditions and using microwave radiation with controlled power as heating source. The obtained water-soluble VILA-CMC derivatives were characterized by FT-IR spectroscopy and their surface-active properties evaluated. All derivatives showed a very low esterification extent and moderate surface tension lowering effect. Nevertheless, they exhibited significant emulsifying efficiency comparable to that of the synthetic surfactant, Tween 20. The results suggested that suitable surface-active VILA-CMC derivatives can be prepared under microwave heating at low microwave power and reaction times in the range of few minutes, which represents a great advantage in comparison to transesterification reactions lasting up to 6 h at conventional heating.
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