Li Qingning, Liu Ziyang, Zheng Sijie, Li Weizheng, Ren Yongyuan, Li Lingling, Yan Feng
Jiangsu Engineering Laboratory of Novel Functional Polymeric Materials, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China.
ACS Appl Mater Interfaces. 2022 Jun 8;14(22):26068-26076. doi: 10.1021/acsami.2c06682. Epub 2022 May 30.
The development of hydrogels and ionic gels for applications in fields such as soft electronics and wearable sensors is limited by liquid evaporation or leakage. Ionic conductors without volatile liquids are better choices for flexible and transparent devices. Here, a liquid polymer electrolyte (LPE) is prepared from a mixture of lithium bis(trifluoromethane)sulfonimide and polyethylene glycol (PEG) above the melting point of PEG. A three-dimensional (3D) printable solvent-free ionic elastomer (IE) is introduced by photopolymerization of ethyl acrylate and hydroxyethyl acrylate in the prepared LPE. The conductivity is significantly improved by the presence of a high content of the lithium salt. Dynamic cross-linking networks improve the stretchability and resilience of the elastomer. The pattern design capability of the IE is provided by light-curing 3D printing. These features demonstrate that the IE has broad application prospects in flexible sensors, ion skins, and soft robots.
用于软电子和可穿戴传感器等领域的水凝胶和离子凝胶的发展受到液体蒸发或泄漏的限制。对于柔性和透明设备而言，不含挥发性液体的离子导体是更好的选择。在此，通过在高于聚乙二醇（PEG）熔点的条件下，由双（三氟甲烷）磺酰亚胺锂和聚乙二醇（PEG）的混合物制备了一种液体聚合物电解质（LPE）。通过在制备的LPE中使丙烯酸乙酯和羟乙基丙烯酸酯进行光聚合，引入了一种三维（3D）可打印的无溶剂离子弹性体（IE）。高含量锂盐的存在显著提高了导电性。动态交联网络改善了弹性体的拉伸性和回弹性。IE的图案设计能力由光固化3D打印提供。这些特性表明，IE在柔性传感器、离子皮肤和软机器人领域具有广阔的应用前景。
