Liquid-Free Ionic Conductive Elastomers with High Mechanical Strength and Rapid Healable Ability
Liquid-Free Ionic Conductive Elastomers with High Mechanical Strength and Rapid Healable Ability
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DOI：
10.1021/acsapm.2c00133
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发表时间：
2022-04-11
影响因子：
5
通讯作者：
He, Minghui
中科院分区：
文献类型：
--
作者：
Sang, Peisen;Li, Ren'ai;He, Minghui
无液体离子导电弹性体（ICE）用于柔性电子元件，因为它们解决了液体泄漏和蒸发问题。在日常使用中，我们常常需要较高的机械强度和快速的自愈性能。在这里，我们报告了使用合理设计的可聚合低共熔溶剂（PDES）开发出具有高机械性能（> 1 MPa）和快速修复能力的无液体ICE。 2-丙烯酰胺-2-甲基丙磺酸（AMPS）已作为硬单体引入PDES体系中，因为AMPS单体含有具有强氢键相互作用的磺酸基团。通过快速紫外固化过程，PDES 共聚单体可以在光引发剂存在下快速聚合成高性能 ICE。由于组分之间的软链和硬链之间强烈的氢键相互作用和缠结，所制备的ICE表现出快速修复特性（4小时内修复效率高达86.5%），同时保持高机械强度（拉伸应力高达5.7 MPa）。此外，ICE还具有高透明度（平均透光率高达92%）、良好的离子电导率（0.2-0.7 x 10(-2) S/m）以及在没有外部刺激的情况下快速的电自愈特性（2 s内）。基于其出色的多功能性，它们可以用作应变传感器来检测人体运动。我们相信基于PDES的ICE的研究将为柔性电子器件的开发提供一种方法。
Liquid-free ionic conductive elastomers (ICEs) are used in flexible electronic components because they solve liquid leakage and evaporation problems. In everyday use, we often need high mechanical strength and rapid self-healing performance. Here, we report the development of liquid-free ICEs with high mechanical properties (>1 MPa) and rapid healable ability using rationally designed polymerizable deep eutectic solvents (PDESs). 2-Acrylamide-2-methylpropanesulfonic acid ( AMPS) has been introduced as a hard monomer in PDES systems, because the AMPS monomer contains the sulfonic acid group with strong hydrogen bond interaction. Through a rapid UV curing process, PDES comonomers can be rapidly polymerized into high performance ICEs in the presence of a photoinitiator. Due to the strong hydrogen-bonding interactions and entanglements between soft and hard chains among the components, the prepared ICEs show rapid healable properties (healing efficiency up to 86.5% in 4 h) while maintaining high mechanical strength (tensile stress up to 5.7 MPa). In addition, the ICEs also have high transparency (average light transmittance up to 92%), good ionic conductivity (0.2-0.7 x 10(-2) S/m), and rapid electrical self-healing properties (within 2 s) in the absence of external stimulation. On the basis of their excellent versatility, they can be used as strain sensors to detect human motion. We believe that the study of PDES-based ICEs will provide a method for the development of flexible electronics.