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论文类型：期刊论文

发表时间：2008-09-15

发表刊物：MATERIALS LETTERS

收录刊物：SCIE、EI、Scopus

卷号：62

期号：24

页面范围：3999-4002

ISSN号：0167-577X

关键字：semi-IPN; mechanical properties; nanocomposites; hydrogel; bentonite

摘要：Amphoteric semi-interpenetrating polymer network nanocomposite (semi-IPN-NC) hydrogels were prepared by graft polymerization of acrylic acid onto starch in cationic polyacrylamide/bentonite nanocomposite aqueous dispersion. Cationic polyacrylamide (CPAM) was used as both an intercalating agent to enlarge interlayer space and a linear polymer chain to fabricate the semi-IPN structure. XRD and TEM confirmed a successful intercalation of CPAM into bentonite. Polymerization temperature was monitored in an attempt to explain the dependence of swelling on the polymerization conditions. The results showed that the hydrogel was of a high swelling and compressive strength even under water content of more than 99%. (C) 2008 Elsevier B.V. All rights reserved.