期刊
JOURNAL OF APPLIED POLYMER SCIENCE
卷 99, 期 3, 页码 1100-1103出版社
WILEY
DOI: 10.1002/app.22091
关键词
chitosan; hydrogels; interpenetrating networks (IPN); swelling
Interpenetrating polymer network (IPN) hydrogels composed of poly(2-ethyl-2-oxazoline) (PEtOz) and chitosan (CS) were prepared with radical polymerization and were characterized for their swelling properties. Sample OC11 (hydrogel weight ratio PEtOz/CS = 1/1) swelled more than samples OC21 (PEtOz/CS = 2/1) and OC31 (PEtOz/CS =3/1), exhibiting a swelling ratio of about 2000 wt % in deionized water; the swelling ratios of the other samples were about 1000 and 700 wt %. The swelling behavior of the IPN hydrogels was observed under various pH and temperature conditions. The swelling ratios of the samples ranged from about 2000 to 6500 wt % at lower pHs, with a maximum swelling ratio of about 6500 wt % in a pH 2 aqueous solution. They exhibited low critical solution temperature behavior, with sample OC31 more sensitive to temperature and sample OC11 more sensitive to pH. (c) 2005 Wiley Periodicals, Inc.
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