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A novel strategy for fabricating highly stretchable and highly conductive photoluminescent ionogels via in situ self-catalytic cross-linking reaction in ionic liquids.
作者:Shuai Hao, Jianxin Zhang, Xuemeng Yang, Tianci Li, Hongzan Song
關鍵字:stretchable;ionogel; self-catalytic
論文來源:期刊
具體來源:Journal of Materials Chemistry C
發表時間:2021年
We report a new method to fabricate highly stretchable and highly conductive fluorescent ionogels by self-catalytic cross-linking of poly(ionic liquid)s-based copolymers contains epoxy groups in ionic liquids (ILs) without adding any conventional cross-linkers and chromophores. Here, ILs serve as solvent, electrolyte, and catalyst, while the product of ring-opening reactions as cross-linking junctions. The results reveal these systems are typical autocatalytic systems and ILs anion type significantly influences the curing reaction kinetics. These ionogels exhibit excellent stretchability (>1200%), high ionic conductivity (> 1 mS/cm), and good temperature tolerance (-40-200 °C). Surprisingly, the special cross-linking structures make the ionogels show typical aggregation-induced emission behavior and possess tunable photoluminescence properties. Moreover, ionogel-based strain sensors exhibit fast response speed, excellent temperature tolerance and stability, and can monitor various human motions. Therefore, our study provides a facile method to utilize several distinct properties of ILs and PILs for designing multifunctional ionogels that serve as flexible conductive and fluorescent materials
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