A Novel Nanocomposite Hydrogel with Precisely Tunable UCST and LCST
A Novel Nanocomposite Hydrogel with Precisely Tunable UCST and LCST
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DOI：
10.1002/marc.201400665
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发表时间：
2015-03-01
影响因子：
4.6
通讯作者：
Zhu, Meifang
中科院分区：
文献类型：
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作者：
Xia, Mengge;Cheng, Yanhua;Zhu, Meifang
在无机交联剂粘土存在下，通过甲基丙烯酸2-（2-甲氧基乙氧基）乙酯（MEO（2）MA）和低聚甲基丙烯酸乙二醇酯（OEGMA）的原位自由基聚合，制备了一种新型的由有机/无机网络组成的温敏性纳米复合（NC）水凝胶。所得粘土/P（MEO（2）MA-co-OEGMA）水凝胶表现出双体积相变温度、上临界溶解温度（UCST）和下临界溶解温度（LCST），其可通过改变OEGMA单元的分数和交联剂粘土的重量百分比而控制在5 ° C和85 ° C之间。这些新型的NC水凝胶具有优异的可逆热敏性，有望用于温度敏感的应用，如智能光开关。
Novel thermosensitive nanocomposite (NC) hydrogels consisting of organic/inorganic networks are prepared via in situ free radical polymerization of 2-(2-methoxyethoxy) ethyl methacrylate (MEO(2)MA) and oligo(ethylene glycol) methacrylate (OEGMA) in the presence of inorganic cross-linker clay in aqueous solution. The obtained clay/P(MEO(2)MA-co-OEGMA) hydrogels exhibit double volume phase transition temperatures, an upper critical solution temperature (UCST), and a lower critical solution temperature (LCST), which can be controlled between 5 and 85 degrees C by varying the fraction of OEGMA units and the weight percentage of cross-linker clay. These new types of NC hydrogels with excellent reversible thermosensitivity are promising for temperature-sensitive applications such as smart optical switches.