| pH与温度快速响应性P(NIPA-co-AA)凝胶的制备与表征 |
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| 引用本文： | 陈兆伟,丁斯婷,杨成,顾瑾,陈明清.pH与温度快速响应性P(NIPA-co-AA)凝胶的制备与表征[J].高分子材料科学与工程,2006,22(3):190-194. |
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| 作者姓名： | 陈兆伟 丁斯婷 杨成 顾瑾 陈明清 |
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| 作者单位： | 江南大学化学与材料工程学院,江苏,无锡,214036 |
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| 基金项目： | 中国科学院资助项目;江苏省无锡市自然科学基金 |
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| 摘 要： | 首次通过激光光散射研究了致孔剂聚乙二醇(PEG)在反应介质中的聚集状态,分析了PEG的致孔机理。通过将凝胶/PEG复合体在一定浓度碱液中的充分浸渍,找到了一种可将致孔剂完全去除的新方法,制得了快速响应的多孔聚(N-异丙基丙烯酰胺/丙烯酸)共聚水凝胶。由称量法测定了水凝胶的体积相转变温度LCST。温敏性退胀动力学研究表明,多孔水凝胶在2 m in内的失水率可达90%以上;在pH敏感性退胀动力学研究中首次发现,该类多孔共聚水凝胶具有脉冲式的退胀过程,这种性能在特殊的药物缓释领域具有潜在的应用前景。
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| 关 键 词： | N-异丙基丙烯酰胺 多孔结构 致孔机理 快速响应 脉冲式退胀 |
| 文章编号： | 1000-7555（2006）03-0190-05 |
| 收稿时间： | 2005-04-05 |
| 修稿时间： | 2005-07-05 |
PREPARATION AND CHARACTERIZATION OF FAST RESPONSIVE THERMO-AND pH-SENSITIVE P(NIPA-CO-AA) HYDROGELS |
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| CHEN Zhao-wei,DING Si-ting,YANG Cheng,GU Jin,CHEN Ming-qing.PREPARATION AND CHARACTERIZATION OF FAST RESPONSIVE THERMO-AND pH-SENSITIVE P(NIPA-CO-AA) HYDROGELS[J].Polymer Materials Science & Engineering,2006,22(3):190-194. |
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| Authors: | CHEN Zhao-wei DING Si-ting YANG Cheng GU Jin CHEN Ming-qing |
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| Affiliation: | School of Chemical and Material Engineering, Southern Yangtze University, Wuxi 214036 |
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| Abstract: | The aggregated state of pore-forming agent poly(ethylene glycol)(PEG) was investigated by laser light scattering(LLS) and scanning electron microscope(SEM).The pore-forming mechanism of PEG was analysed.The PEG was totally washed out through re-deswelling.Fast-responsive thermo-and pH-sensitive porous poly(N-isopropylacrylamide-co-acrylic acid) copolymer hydrogels were prepared by this method.Lower critical solution temperature(LCST) as volume phase transition temperature was determined gravimetrically.More than 90% of water could be expelled from the porous hydrogels within 2 min.A pulsed deswelling was first discovered during the study. |
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| Keywords: | N-isopropylacrylamide porous structure pore-forming mechanism fast response pulsed deswelling |
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