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Journal of Bioactive and Compatible Polymers
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A New Class of Starch-Based Hydrogels Incorporating Acrylamide and Vinyl Pyrrolidone: Effects of Reaction Variables on Water Sorption Behavior

Li-Ming Zhang

School of Chemistry and Chemical Engineering and Key Laboratory for Polymeric Composite and Functional Materials of Ministry of Education, Zhongshan (Sun Yat-sen) University, Guangzhou 510275, P. R. China, ceszhlm{at}zsu.edu.cn

Guang-Hai Wang

School of Chemistry and Chemical Engineering and Key Laboratory for Polymeric Composite and Functional Materials of Ministry of Education, Zhongshan (Sun Yat-sen) University, Guangzhou 510275, P. R. China

Hong-Wei Lu

School of Chemistry and Chemical Engineering and Key Laboratory for Polymeric Composite and Functional Materials of Ministry of Education, Zhongshan (Sun Yat-sen) University, Guangzhou 510275, P. R. China

Chuan Yang

Second Affiliated Hospital, Zhongshan (Sun Yat-sen) University, Guangzhou 510102, P. R. China

Li Yan

Second Affiliated Hospital, Zhongshan (Sun Yat-sen) University, Guangzhou 510102, P. R. China

A new class of starch-based hydrogels incorporating acrylamide (AM) and vinyl pyrrolidone (VP) were prepared by ceric ammonium nitrate initiated polymerization in the presence of N,N -methylene bisacrylamide (MBA). The swelling and diffusion characteristics in water were studied with respect to the effects of reaction variables such as the type and amount of starch, the amounts of AM and VP, as well as MBA concentration. It was found that these reaction variables affected the swelling ratio of the hydrogels and the kinetics parameters of the water sorption process. The water transport mechanism in the swelling starch-based hydrogels was non-Fickian diffusion.

Key Words: starch-based hydrogel • swelling kinetics • water sorption

Journal of Bioactive and Compatible Polymers, Vol. 20, No. 5, 491-501 (2005)
DOI: 10.1177/0883911505055163
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