Inorganic/Organic Double‐Network Gels Containing Ionic Liquids,Advanced Materials

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Inorganic/Organic Double‐Network Gels Containing Ionic Liquids
Advanced Materials ( IF 27.4 ) Pub Date : 2017-11-08 , DOI: 10.1002/adma.201704118
Eiji Kamio ₁ , Tomoki Yasui ₁ , Yu Iida ₁ , Jian Ping Gong _{2,

3} , Hideto Matsuyama ₁

Affiliation

Highly robust ion gels, termed double‐network (DN) ion gels, composed of inorganic/organic interpenetrating networks and a large amount of ionic liquids (ILs), are fabricated. The DN ion gels with an 80 wt% IL content show extraordinarily high mechanical strength: more than 28 MPa of compressive fracture stress. In the DN ion gel preparation, a brittle inorganic network of physically bonded silica nanoparticles and a ductile organic network of polydimethylacrylamide (PDMAAm) are formed in the IL. Because of the different reaction mechanisms of the inorganic/organic networks, the DN ion gels can be formed by an easy and free‐shapeable one‐pot synthesis. They can be prepared in a controllable manner by manipulating the formation order of the inorganic and organic networks via not only multistep but also single‐step processes. When silica particles form a network prior to the PDMAAm network formation, DN ion gels can be prepared. The brittle silica particle network in the DN ion gel, serving as sacrificial bonds, easily ruptures under loading to dissipate energy, while the ductile PDMAAm network maintains the shape of the material by the rubber elasticity. Given the reversible physical bonding between the silica particles, the DN ion gels exhibit a significant degree of self‐recovery by annealing.

中文翻译：

含离子液体的无机/有机双网凝胶

制备了高度耐用的离子凝胶，称为双网络（DN）离子凝胶，它由无机/有机互穿网络和大量离子液体（IL）组成。IL含量为80 wt％的DN离子凝胶显示出异常高的机械强度：超过28 MPa的压缩断裂应力。在DN离子凝胶制备中，IL中形成了物理结合的二氧化硅纳米颗粒的脆性无机网络和聚二甲基丙烯酰胺（PDMAAm）的韧性有机网络。由于无机/有机网络的反应机理不同，DN离子凝胶可通过简单且可自由变形的一锅法合成而形成。它们不仅可以通过多步操作，而且可以通过单步操作来控制无机和有机网络的形成顺序，从而以可控的方式制备。当二氧化硅颗粒在PDMAAm网络形成之前形成网络时，可以制备DN离子凝胶。DN离子凝胶中的二氧化硅脆性颗粒网络用作牺牲键，在载荷作用下容易破裂以耗散能量，而可延展的PDMAAm网络则通过橡胶弹性来保持材料的形状。考虑到二氧化硅颗粒之间可逆的物理键合，DN离子凝胶通过退火表现出显着的自恢复程度。

更新日期：2017-11-08

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