| 聚N-异丙基丙烯酰胺水凝胶的制备及热致聚集行为 |
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| 引用本文： | 胡耀强,陈法锦,刘海宁,张慧芳,吴志坚,叶秀深. 聚N-异丙基丙烯酰胺水凝胶的制备及热致聚集行为[J]. 材料导报, 2018, 32(14): 2491-2496 |
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| 作者姓名： | 胡耀强 陈法锦 刘海宁 张慧芳 吴志坚 叶秀深 |
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| 作者单位： | 广东海洋大学海洋与气象学院;中国科学院青海盐湖研究所中国科学院盐湖资源综合高效利用重点实验室;青海省盐湖资源化学重点实验室 |
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| 基金项目： | 国家自然科学基金(U1507104；51403229；21401209)；青海省基础研究计划项目(2018-ZJ-706)；中国科学院西部之光人才项目；中国科学院青年创新促进会人才项目；广东海洋大学创新强校项目(GDOU2014050201) |
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| 摘 要： | 以异丙基丙烯酰胺(NIPAM)为单体、N,N’-亚甲基双丙烯酰胺(MBA)为交联剂、过硫酸钾(KPS)为引发剂,采用无皂乳液聚合法制备聚N-异丙基丙烯酰胺(PNIPAM),考察了聚合时间、温度、浓度、pH值、共存NaCl和MgCl2浓度对PNIPAM热致聚集行为的影响,并通过扫描电镜(SEM)、红外光谱(FTIR)等手段对PNIPAM的形貌和分子结构进行了表征。结果表明:线型PNIPAM更易在水中稳定存在,采用无皂乳液聚合技术制备PNIPAM过程简单、易操作,产物温敏效应明显。PNIPAM的热致聚集行为随聚合时间的延长、PNIPAM悬浊液浓度的增加、pH值的减小、共存盐浓度的增大而更为显著。
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| 关 键 词： | 温敏效应 PNIPAM NIPAM 水凝胶 |
Preparation of Poly(N-isopropylacrylamide) Hydrogel and Its Thermally Induced Aggregation Behavior |
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| HU Yaoqiang,CHEN Fajin,LIU Haining,ZHANG Huifang,WU Zhijian and YE Xiushen. Preparation of Poly(N-isopropylacrylamide) Hydrogel and Its Thermally Induced Aggregation Behavior[J]. Materials Review, 2018, 32(14): 2491-2496 |
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| Authors: | HU Yaoqiang CHEN Fajin LIU Haining ZHANG Huifang WU Zhijian YE Xiushen |
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| Affiliation: | College of Ocean and Meteorology, Guangdong Ocean University, Zhanjiang 524088;Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources, Chinese Academy of Sciences, Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining 810008,College of Ocean and Meteorology, Guangdong Ocean University, Zhanjiang 524088,Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources, Chinese Academy of Sciences, Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining 810008;Key Laboratory of Salt Lake Resources Chemistry of Qinghai Province, Xining 810008,Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources, Chinese Academy of Sciences, Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining 810008;Key Laboratory of Salt Lake Resources Chemistry of Qinghai Province, Xining 810008,Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources, Chinese Academy of Sciences, Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining 810008;Key Laboratory of Salt Lake Resources Chemistry of Qinghai Province, Xining 810008 and Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources, Chinese Academy of Sciences, Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining 810008;Key Laboratory of Salt Lake Resources Chemistry of Qinghai Province, Xining 810008 |
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| Abstract: | The PNIPAM hydrogels were prepared by emulsifier-free emulsion polymerization method, using NIPAM as monomer, MBA as crosslinking agent and KPS as initiator. Morphology and molecular structure of PNIPAM were examined by SEM and FTIR measurements. The influences of polymerization time, temperature, concentration, pH, coexisted NaCl and MgCl2 on the thermally induced aggregation behavior were comprehensively investigated. The results indicated that this method is simple and easy to operate, and the obtained hydrogel has an obvious thermal-responsive effect. Its thermally induced aggregation behavior becomes more significant with the extension of polymerization time. The thermally induced aggregation behavior of PNIPAM becomes more obvious with the increase of polymerization time, PNIPAM concentration and coexisted salt concentration, or the decrease of pH. |
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| Keywords: | thermo-responsive PNIPAM NIPAM hydrogel |
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