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Structural design of PNIPA-based intelligent hydrogels via porous silica templates

机译：基于PNIPA的智能水凝胶的多孔硅胶模板结构设计

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Intelligent temperature-sensitive hydrogels have been synthesized using a hierarchically organized, porous silica gel as template. The organic gels were obtained by three-dimensional copolymerization of N-isopropylacrylamide and N,N’- bis(acryloyl)cystamine in the free volume of a monolith of a porous silica gel. After characterization, the silica matrix was dissolved in alkali. Unexpectedly, the remaining organic polymer showed similar properties to a gel obtained in homogeneous solution. The shape of the inorganic mould was retained in the purely organic hydrogel even after dissolution of the inorganic part and it showed the ability to collapse under enhanced temperatures. The collapse rate of the gel prepared via the template synthesis was much higher compared to gels prepared conventionally.
机译：使用分层组织的多孔硅胶作为模板合成了智能的温度敏感型水凝胶。通过在多孔硅胶整体的自由体积中N-异丙基丙烯酰胺和N，N’-双（丙烯酰基）胱胺的三维共聚获得有机凝胶。表征后，将二氧化硅基质溶解在碱中。出乎意料的是，剩余的有机聚合物表现出与在均匀溶液中获得的凝胶相似的性质。甚至在无机部分溶解后，无机模具的形状仍保留在纯有机水凝胶中，并且在升高的温度下显示出塌陷的能力。与常规制备的凝胶相比，通过模板合成制备的凝胶的崩解速率要高得多。

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