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Granular Ionogel Particle Inks for 3D Printed Tough and Stretchable Ionotronics

摘要 Ionogels have garnered great attention as promising soft conducting materials for the fabrication of flexible energy storage devices,soft actuators,and ionotronics.However,the leakage of the ionic liquids,weak mechanical strength,and poor manufacturability have greatly limited their reliability and applications.Here,we propose a new ionogel synthesis strategy by utilizing granular zwitterionic microparticles to stabilize ionic liquids.The ionic liquids swell the microparticles and physically crosslink microparticles via either electronic interaction or hydrogen bonding.Further introducing a photocurable acrylic monomer enables the fabrication of double-network(DN)ionogels with high stretchability(＞600％)and ultrahigh toughness(fracture energy＞10 kJ/m2).The synthesized ionogels exhibit a wide working temperature of-60 to 90 ℃.By tuning the crosslinking density of microparticles and physical crosslinking strength of ionogels,we synthesize DN ionogel inksand print them into three-dimensional(3D)motifs.Several ionogel-based ionotronics are 3D printed as demonstrations,including strain gauges,humidity sensors,and ionic skins made of capacitive touch sensor arrays.Via covalently linking ionogels with silicone elastomers,we integrate the ionogel sensors onto pneumatic soft actuators and demonstrate their capacities in sensing large deformation.As our last demonstration,multimaterial direct ink writing is harnessed to fabricate highly stretchable and durable alternating-current electroluminescent devices with arbitrary structures.Our printable granular ionogel ink represents a versatile platform for the future manufacturing of ionotronics.

doi： 10.34133/research.0104

作者： Yuan Yao Yue Hui Zhenhua Wang Hehao Chen Heng Zhu Nanjia Zhou

Author： Yuan Yao Yue Hui Zhenhua Wang Hehao Chen Heng Zhu Nanjia Zhou

作者单位： Key Laboratory of 3D Micro/Nano Fabrication and Characterization of Zhejiang Province,School of Engineering,Westlake University,Hangzhou 310024,Zhejiang Province,China Institute of Advanced Technology,Westlake Institute for Advanced Study,Hangzhou 310024,Zhejiang Province,China School of Chemical Engineering and Advanced Materials,the University of Adelaide,Adelaide 5005,South Australia,Australia State Key Laboratory of Fluid Power & Mechatronic System,Key Laboratory of Soft Machines and Smart Devices of Zhejiang Province,Center for X-Mechanics,Department of Engineering Mechanics,Zhejiang University,Hangzhou 310027,China

刊名研究（英文） ISTICSCI

年，卷(期)： 2024, 2024(1)

机标分类号： TP391.41 TS2 U465.6

在线出版日期： 2024年4月15日

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