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    Home > Chemicals Industry > New Chemical Materials > The Institute of Mechanics and others have prepared a multi-scale spiral structure of conductive materials/polymer composite materials

    The Institute of Mechanics and others have prepared a multi-scale spiral structure of conductive materials/polymer composite materials

    • Last Update: 2022-06-12
    • Source: Internet
    • Author: User
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    Flexible wearable electronic devices have the characteristics of light weight, strong deformability, and easy integration into wearable clothing, and have application prospects in the fields of medical treatment, health, human-computer interaction, and soft robots
    Improving the deformability of conductors and sensors and ensuring their excellent electrical performance are key issues in this field

    ? The flexible materials, structure and device mechanics group of the State Key Laboratory of Nonlinear Mechanics, Institute of Mechanics, Chinese Academy of Sciences, and Beihang University have designed and prepared conductive materials with multi-scale spiral structure, large deformation capacity and high stability ( Carbon nanotubes (CNTs)/polymer (polyurethane PU) composite materials

    The research proved theoretically and experimentally that the coupling effect of micro/nano multi-scale structure can enhance the mechanical properties of materials

    ? Researchers sprayed CNTs dispersion uniformly on the oriented PU nanofiber substrate, and then twisted to an over-twisted state to obtain CNTs/PU fibers with a multi-scale spiral structure

    CNTs are wrapped inside the fiber during the twisting process to form a sandwich CNTs/PU composite structure, which improves the structural stability of the material

    The coated CNTs enhance the mechanical strength of the material, and under the synergistic effect of the multi-level structure, the spiral fiber can be stretched to 17 times of itself

    Because of its super stretchability, low production cost, strong universality, knitability and other advantages, it can be applied to fields such as flexible robots, large strain sensor devices, and smart wearable fabrics

    Related research results were published on ACS Nano (ACS Nano 2020, 14,3442).
    Researcher Su Yewang of the Institute of Mechanics, Beijing University of Aeronautics and Astronautics Professor Zhao Yong, and Associate Professor Wang Nu are the co-corresponding authors of the paper

    The research work is supported by the National Natural Science Foundation of China

    Carbon nanotubes (CNTs)/polyurethane (PU) fibers with multi-scale winding and interlocking spiral structure
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