The enhancement in dielectric properties and self-healing ability for dielectric materials has been a challenging subject these years. Herein, a series of self-healed dielectric elastomers by combining the ferric ions and carboxyl-containing poly(sulfone siloxane)s is reported. Experimental results indicate the excellent dielectric properties of obtained elastomers, as the dielectric constant up to 12.8. SEM micrographs exhibit that carboxyl groups and ferric ions can aggregate together to generate clusters, which further result in interfacial polarization. Besides, high polarity dipole units including sulfonyl units and carboxyl groups contribute to dipole polarization. The overlay of the two mentioned polarization eventually results in the high dielectric property. The dielectric constant obviously increases with the contents of carboxyl groups and ferric ions. Moreover, the samples are feasible for recycling and reprocessing with high self-healing efficiency, owing to the reversibility of the coordination bond. A self-healing efficiency of 92.1% in tensile strength of the obtained samples can be reached after 2 h treatment at 60 °C. And the elastomers can also conveniently recover most mechanical properties after solution treatment. This work may offer a promising method for preparing dielectric elastomers with high dielectric properties and self-healing ability.

中文翻译：

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基于配位键的具有优异介电性能和高可回收性的超分子弹性体

近年来，介电材料介电性能和自愈能力的增强一直是一个具有挑战性的课题。在此，报道了一系列通过结合铁离子和含羧基聚（砜硅氧烷）的自修复介电弹性体。实验结果表明所得弹性体具有优异的介电性能，介电常数高达12.8。SEM 显微照片显示，羧基和铁离子可以聚集在一起生成团簇，进一步导致界面极化。此外，包括磺酰基单元和羧基在内的高极性偶极单元有助于偶极极化。上述两种极化的叠加最终导致高介电特性。介电常数随着羧基和铁离子含量的增加而明显增加。此外，由于配位键的可逆性，样品可回收和再加工，具有很高的自愈效率。在 60 °C 下处理 2 小时后，所得样品的拉伸强度自愈效率可达 92.1%。并且弹性体在固溶处理后也可以很方便地恢复大部分力学性能。这项工作可能为制备具有高介电性能和自愈能力的介电弹性体提供一种有前途的方法。在 60 °C 下处理 2 小时后，所得样品的拉伸强度可达到 1%。并且弹性体在固溶处理后也可以很方便地恢复大部分力学性能。这项工作可能为制备具有高介电性能和自愈能力的介电弹性体提供一种有前途的方法。在 60 °C 下处理 2 小时后，所得样品的拉伸强度可达到 1%。并且弹性体在固溶处理后也可以很方便地恢复大部分力学性能。这项工作可能为制备具有高介电性能和自愈能力的介电弹性体提供一种有前途的方法。