https://scholars.lib.ntu.edu.tw/handle/123456789/627627
標題: | Tough, Self-Healing, and Conductive Elastomer ─Ionic PEGgel | 作者: | Wang, Zhenwu Lai, Yu-Cheng Chiang, Ya-Tang Scheiger, Johannes Martin Li, Shuai Dong, Zheqin Cai, Qianyu Liu, Sida Hsu, Shan-Hui CHOU CHIA-CHING Levkin, Pavel A |
關鍵字: | flexible electronics; ionic elastomers; ionotronics; self-healing materials; strain sensors | 公開日期: | 28-十月-2022 | 出版社: | AMER CHEMICAL SOC | 卷: | 14 | 期: | 44 | 起(迄)頁: | 50152 | 來源出版物: | ACS applied materials & interfaces | 摘要: | Ionically conductive elastomers are necessary for realizing human-machine interfaces, bioelectronic applications, or durable wearable sensors. Current design strategies, however, often suffer from solvent leakage and evaporation, or from poor mechanical properties. Here, we report a strategy to fabricate ionic elastomers (IHPs) demonstrating high conductivity (0.04 S m-1), excellent electrochemical stability (>60,000 cycles), ultra-stretchability (up to 1400%), high toughness (7.16 MJ m-3), and fast self-healing properties, enabling the restoration of ionic conductivity within seconds, as well as no solvent leakage. The ionic elastomer is composed of in situ formed physically cross-linked poly(2-hydroxyethyl methacrylate) networks and poly(ethylene glycol) (PEG). The long molecular chains of PEG serve as a solvent for dissolving electrolytes, improve its long-term stability, reduce solvent leakage, and ensure the outstanding mechanical properties of the IHP. Surprisingly, the incorporation of ions into PEG simultaneously enhances the strength and toughness of the elastomer. The strengthening and toughening mechanisms were further revealed by molecular simulation. We demonstrate an application of the IHPs as (a) flexible sensors for strain or temperature sensing, (b) skin electrodes for recording electrocardiograms, and (c) a tough and sensing material for pneumatic artificial muscles. The proposed strategy is simple and easily scalable and can further inspire the design of novel ionic elastomers for ionotronics applications. |
URI: | https://scholars.lib.ntu.edu.tw/handle/123456789/627627 | ISSN: | 1944-8244 | DOI: | 10.1021/acsami.2c14394 |
顯示於: | 應用力學研究所 |
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