• Advanced Fiber Materials
  • Vol. 6, Issue 1, 00344 (2024)
Yapeng Zheng1, Haodong Liu2, Jingwen Wang1, Tianyang Cui1..., Jixin Zhu1,* and Zhou Gui1,**|Show fewer author(s)
Author Affiliations
  • 1State Key Laboratory of Fire Science, University of Science and Technology of China, Hefei 230026, People’s Republic of China
  • 2Frontiers Science Center for Flexible Electronics (FSCFE), Xi’an Institute of Flexible Electronics (IFE), Xi’an Institute of Biomedical Materials & Engineering, Northwestern Polytechnical University (NPU), 127 West Youyi Road, Xi’an 710072, People’s Republic of China
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    DOI: 10.1007/s42765-023-00344-x Cite this Article
    Yapeng Zheng, Haodong Liu, Jingwen Wang, Tianyang Cui, Jixin Zhu, Zhou Gui. Unlocking Intrinsic Conductive Dynamics of Ionogel Microneedle Arrays as Wearable Electronics for Intelligent Fire Safety[J]. Advanced Fiber Materials, 2024, 6(1): 00344 Copy Citation Text show less

    Abstract

    Ionogels have enabled flexible electronic devices for wide-ranging innovative applications in wearable electronics, soft robotics, and intelligent systems. Ionogels for flexible electronics need to essentially tolerate stress, temperature, humidity, and solvents that may cause their electrical conductivity, structural stability, processing compatibility and sensibility failure. Herein, we developed a novel in-situ photopolymerization protocol to fabricate intrinsically conductive, self-gated ionogels via ion-restriction dual effects. Highly sensitive and intelligent safety sensors with tunable stretchability, robust chemical stability, favorable printability, and complete recyclability, are programmed from defined microneedle arrays printed by the intrinsically conductive ionogel. Ultrahigh elasticity (~ 794% elongation), high compression tolerance (~ 90% deformation), improved mechanical strength (tensile and compressive strength of ~ 2.0 MPa and ~ 16.3 MPa, respectively) and remarkable transparency (> 91.1% transmittance), as well as high-temperature sensitivity (- 2.07% °C-1) and a wide working range (- 40 to 200 °C) can be achieved. In particular, the intrinsic sensing mechanisms of ion-restriction dual effects are unlocked based on DFT calculations and MD simulations, and operando temperature-dependent FTIR, and Raman technologies. Moreover, the real-time intelligent monitoring systems toward physical signals and precise temperature based on the microneedle array-structures sensors are also presented and demonstrate great potential applications for extreme environments, e.g., fire, deep-sea or aerospace.
    Yapeng Zheng, Haodong Liu, Jingwen Wang, Tianyang Cui, Jixin Zhu, Zhou Gui. Unlocking Intrinsic Conductive Dynamics of Ionogel Microneedle Arrays as Wearable Electronics for Intelligent Fire Safety[J]. Advanced Fiber Materials, 2024, 6(1): 00344
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