期刊
JOURNAL OF APPLIED POLYMER SCIENCE
卷 91, 期 5, 页码 2876-2880出版社
WILEY-BLACKWELL
DOI: 10.1002/app.13516
关键词
interpenetrating polymer network (IPN); hydrogels; swelling
Temperature- and pH-responsive semiinterpenetrating polymer network (SIPN) hydrogels, constructed with chitosan (CS) and poly(diallyldimethylammonium chloride) (PDADMAC), were studied. The characterizations of the IPN hydrogels were investigated by fourier transform infrared spectroscopy (FTIR), differential scanning calorimetry (DSC), and swelling tests, under various conditions. CS/PDADMAC SIPN hydrogels exhibited a relatively high swelling ratio, in the range of 248-462%, at 25degreesC. The swelling ratio of CS/PDADMAC IPN hydrogels are pH, temperature, and ionic concentration dependent. DSC was used for the quantitative determination of the amounts of freezing and nonfreezing water. The amount of free water increased with increasing PDADMAC content in the IPN hydrogels. (C) 2004 Wiley Periodicals, Inc.
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