Preparation of starch esters with crosslinking structures derived from dianhydride

Abstract

Starch is a kind of natural polymer used in many industrial fields because of its low cost, availability and biodegradation. Potato starch was modified by esterification with pyromellitic dianhydride, and the products were obtained with crosslinking structures. Orthogonal experiments showed that reactive temperature was the primary influencing factor. The product prepared at 40°C for 3 h with the mass ratio of starch and dianhydride of 16∶1 and pH value of 7.5 exhibited a degree of substitution of 11%. FTIR and UV analysis verified the formation of starch esters.

Keywords

potato starch / pyromellitic dianhydride / esterification / crosslink

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Acknowledgments

The authors greatly acknowledged the National Natural Science Foundation of China (Grant No. 50773018), the Education Department of Henan Province (2010A430002), Zhengzhou Science and Technology Bureau and Research Foundation for Advanced Talents of Henan University of Technology (No. 2006BS021) for supporting this work.

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2014 Higher Education Press and Springer-Verlag Berlin Heidelberg