Tao Lumi, Liu Yuchuan, Wu Dan, Wei Qiao-Hua, Taubert Andreas, Xie Zailai
Fujian Provincial Key Laboratory of Electrochemical Energy Storage Materials, College of Chemistry, Fuzhou University, 2 Xueyuan Road, Fuzhou 350002, China.
Institute of Chemistry, University of Potsdam, 14476 Potsdam, Germany.
Nanomaterials (Basel). 2020 Dec 15;10(12):2521. doi: 10.3390/nano10122521.
The paper describes a new kind of ionogel with both good mechanical strength and high conductivity synthesized by confining the ionic liquid (IL) 1-butyl-3-methylimidazolium bis(trifluoromethane sulfonyl)imide ([Bmim][NTf]) within an organic-inorganic hybrid host. The organic-inorganic host network was synthesized by the reaction of methyltrimethoxysilane (MTMS), tetraethoxysilane (TEOS), and methyl methacrylate (MMA) in the presence of a coupling agent, offering the good mechanical strength and rapid shape recovery of the final products. The silane coupling agent 3-methacryloxypropyltrimethoxysilane (KH-570) plays an important role in improving the mechanical strength of the inorganic-organic hybrid, because it covalently connected the organic component MMA and the inorganic component SiO. Both the thermal stability and mechanical strength of the ionogel significantly increased by the addition of IL. The immobilization of [Bmim][NTf] within the ionogel provided the final ionogel with an ionic conductivity as high as ca. 0.04 S cm at 50 °C. Moreover, the hybrid ionogel can be modified with organosilica-modified carbon dots within the network to yield a transparent and flexible ionogel with strong excitation-dependent emission between 400 and 800 nm. The approach is, therefore, a blueprint for the construction of next-generation multifunctional ionogels.
该论文描述了一种新型离子凝胶，它通过将离子液体（IL）1-丁基-3-甲基咪唑双（三氟甲烷磺酰）亚胺（[Bmim][NTf]）限制在有机-无机杂化主体中合成，兼具良好的机械强度和高导电性。有机-无机主体网络是通过甲基三甲氧基硅烷（MTMS）、四乙氧基硅烷（TEOS）和甲基丙烯酸甲酯（MMA）在偶联剂存在下反应合成的，赋予了最终产品良好的机械强度和快速的形状恢复能力。硅烷偶联剂3-甲基丙烯酰氧基丙基三甲氧基硅烷（KH-570）在提高无机-有机杂化材料的机械强度方面起着重要作用，因为它将有机组分MMA和无机组分SiO共价连接起来。通过添加IL，离子凝胶的热稳定性和机械强度均显著提高。[Bmim][NTf]固定在离子凝胶中，使最终的离子凝胶在50°C时具有高达约0.04 S cm的离子电导率。此外，杂化离子凝胶可以在网络中用有机硅修饰的碳点进行改性，以产生一种透明且柔性的离子凝胶，在400至800 nm之间具有强烈的激发依赖性发射。因此，该方法是构建下一代多功能离子凝胶的蓝图。
