Autonomous Self-Healing, Antifreezing, and Transparent Conductive Elastomers
Autonomous Self-Healing, Antifreezing, and Transparent Conductive Elastomers
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自主自愈、防冻和透明导电弹性体
DOI：
10.1021/acs.chemmater.9b04592
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发表时间：
2020-01-28
影响因子：
8.6
通讯作者：
He, Minghui
中科院分区：
文献类型：
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作者：
Li, Ren'ai;Fan, Ting;He, Minghui
合成一体化分子网络是一个挑战，这些网络在很宽的温度范围内（从零度到高温）都是自主自我修复的，透明的，可拉伸的，导电的。在这里，我们证明了自愈，透明的，导电的，和高度可拉伸的弹性体的制造由两个可聚合的低共熔溶剂（PDES）单体，丙烯酰胺（AAm）/氯化胆碱（ChCl）和马来酸（MA）/ChCl型PDES的光引发共聚。聚（AAm/ChCl-co-MA/ChCl）体系的二元结构单元之间的氢键可以容易地断裂和改革，允许这种全有机设计的弹性体在-23至60 ℃的宽温度范围内自愈合，同时保持高度透明的外观。该超分子网络弹性体在没有任何外部刺激的情况下表现出快速的自修复性能（2 s内）和优异的自修复效率（高达94%）。弹性体是高度透明的（平均透射率为95.1%），固有导电性（离子电导率为4.0 × 10（-4）S cm（-1）），并在室温下可拉伸（应变高达450%）。我们假设这种行为将在恶劣环境中的可拉伸电子产品的显示和/或光学相关领域中找到它们的潜在用途。
It is a challenge to synthesize all-in-one molecular networks that are autonomously self-healable over a wide temperature range (from subzero to high), transparent, stretchable, and conductive. Here we demonstrate the fabrication of self-healing, transparent, conductive, and highly stretchable elastomers by a photoinitiated copolymerization of two polymerizable deep eutectic solvent (PDES) monomers, acrylic amide (AAm)/choline chloride (ChCl) and maleic acid (MA)/ChCl type PDESs. Hydrogen bonds between binary building blocks of the poly(AAm/ChCl-co-MA/ChCl) system can readily break and reform, allowing such all organic designed elastomers to self-heal over a wide temperature ranging from -23 to 60 degrees C while keep a highly transparent appearance. The hypermolecular network elastomers showed a fast self-healing property (within 2 s) without any other external stimuli and excellent self-healing efficiency (up to 94%). The elastomers were highly transparent (an average transmittance of 95.1%), intrinsically conductive (an ionic conductivity of 4.0 x 10(-4) S cm(-1)), and stretchable (strains up to 450%) at room temperature. We hypothesize that this behavior will find their potential use in display and/or optically related fields of stretchable electronics in harsh environments.