Characterization of genipin crosslinked hydrogels composed of chitosan and partially hydrolyzed poly(vinyl alcohol)

Nand, Ashveen and Rohindra, David and Khurma, Jagjit R. (2007) Characterization of genipin crosslinked hydrogels composed of chitosan and partially hydrolyzed poly(vinyl alcohol). E-Polymers, 033 . pp. 1-9. ISSN 1618-7229

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Abstract

Chitosan and 80 % hydrolyzed poly(vinyl alcohol) (PVA) were used to prepare semi-interpenetrating networks of varying ratios of the constituents. The hydrogels were crosslinked using genipin, a naturally occurring nontoxic cross-linking agent. The swelling behavior of these hydrogels was studied in deionized water at 25, 35 and 45 °C and in media of different pH at 25 °C. The swelling behavior of the gels was found to be dependent on temperature, pH of the medium and the amount of PVA present in the gel. States of water in the hydrogels swollen at 25 °C and pH 7 were determined using Differential Scanning Calorimetry (DSC). The amount of freezing water in the swollen hydrogels increased whereas the amount of nonfreezing bound water decreased with the increase in PVA concentration in the gels. The gelation behaviour of the pregel solutions were also studied.

Item Type:	Journal Article
Subjects:	Q Science > QD Chemistry
Divisions:	Faculty of Science, Technology and Environment (FSTE) > School of Biological and Chemical Sciences
Depositing User:	Ms Mereoni Camailakeba
Date Deposited:	24 May 2007 03:49
Last Modified:	30 May 2012 02:09
URI:	https://repository.usp.ac.fj/id/eprint/771

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