Swelling behavior of poly(acrylamide)/clay nanocomposite hydrogels in acrylamide aqueous solution
Swelling behavior of poly(acrylamide)/clay nanocomposite hydrogels in acrylamide aqueous solution
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DOI：
10.1002/app.29406
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发表时间：
2009-04
影响因子：
3
通讯作者：
Yongmei Jiang;Meifang Zhu;Biao Li;Yang Liu;Z. Qin;Long Chen;Yanmo Chen
中科院分区：
文献类型：
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作者：
Yongmei Jiang;Meifang Zhu;Biao Li;Yang Liu;Z. Qin;Long Chen;Yanmo Chen
研究了聚丙烯酰胺（PAAm）/粘土纳米复合水凝胶（NC凝胶）在丙烯酰胺（AAm）水溶液中的溶胀行为。将制备的PAAm/粘土水凝胶（S-M凝胶）浸泡在AAm水溶液中进行后处理。结果表明，当溶液浓度低于临界浓度（c*）时，NC凝胶的溶胀率大大增加，而当溶液浓度高于临界浓度（c*）时，凝胶在溶液中崩解。在AAm溶液中发现了一些盘状颗粒，并伴随着异常的溶胀行为。通过透射电镜和元素分析进一步证实了NC凝胶在AAm水溶液中的溶胀行为是由于其网络结构发生了变化。© 2008 Wiley Periodicals，Inc.应用聚合物科学杂志，2009年
The swelling behaviors of poly(acrylamide) (PAAm)/clay nanocomposite hydrogels (hereinafter abbreviated as NC gels) in acrylamide (AAm) aqueous solution have been investigated. As-prepared PAAm/clay hydrogels (S-M gels) were posttreated by immersing them in AAm aqueous solution. It was found that the swelling ratio of the NC gels increased greatly when the concentration of the solution is below a critical concentration (c*), whereas the gels were disintegrated in the solution when the concentration of the solution is above the c*. Some disc-like particles were found in the AAm solution accompanying with the unusual swelling behaviors. This unusual swelling behavior is resulted from the change of network structure of the NC gels in AAm aqueous solution, which was further convinced by transmission electron microscopy and element analyses. © 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2009