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Liquid metal-filled magnetorheological elastomer with positive piezoconductivity

Journal Article


Abstract


  • Conductive elastic composites have been used widely in soft electronics and soft robotics. These composites are typically a mixture of conductive fillers within elastomeric substrates. They can sense strain via changes in resistance resulting from separation of the fillers during elongation. Thus, most elastic composites exhibit a negative piezoconductive effect, i.e. the conductivity decreases under tensile strain. This property is undesirable for stretchable conductors since such composites may become less conductive during deformation. Here, we report a liquid metal-filled magnetorheological elastomer comprising a hybrid of fillers of liquid metal microdroplets and metallic magnetic microparticles. The composite’s resistivity reaches a maximum value in the relaxed state and drops drastically under any deformation, indicating that the composite exhibits an unconventional positive piezoconductive effect. We further investigate the magnetic field-responsive thermal properties of the composite and demonstrate several proof-of-concept applications. This composite has prospective applications in sensors, stretchable conductors, and responsive thermal interfaces.

Authors


  •   Yun, Guolin (external author)
  •   Tang, Shiyang
  •   Sun, Shuai
  •   Yuan, Dan (external author)
  •   Zhao, Qianbin (external author)
  •   Deng, Lei (external author)
  •   Yan, Sheng (external author)
  •   Du, Haiping
  •   Dickey, Michael (external author)
  •   Li, Weihua

Publication Date


  • 2019

Citation


  • Yun, G., Tang, S., Sun, S., Yuan, D., Zhao, Q., Deng, L., Yan, S., Du, H., Dickey, M. D. & Li, W. (2019). Liquid metal-filled magnetorheological elastomer with positive piezoconductivity. Nature Communications, 10 (1), 1-9.

Scopus Eid


  • 2-s2.0-85063316943

Number Of Pages


  • 8

Start Page


  • 1

End Page


  • 9

Volume


  • 10

Issue


  • 1

Place Of Publication


  • United Kingdom

Abstract


  • Conductive elastic composites have been used widely in soft electronics and soft robotics. These composites are typically a mixture of conductive fillers within elastomeric substrates. They can sense strain via changes in resistance resulting from separation of the fillers during elongation. Thus, most elastic composites exhibit a negative piezoconductive effect, i.e. the conductivity decreases under tensile strain. This property is undesirable for stretchable conductors since such composites may become less conductive during deformation. Here, we report a liquid metal-filled magnetorheological elastomer comprising a hybrid of fillers of liquid metal microdroplets and metallic magnetic microparticles. The composite’s resistivity reaches a maximum value in the relaxed state and drops drastically under any deformation, indicating that the composite exhibits an unconventional positive piezoconductive effect. We further investigate the magnetic field-responsive thermal properties of the composite and demonstrate several proof-of-concept applications. This composite has prospective applications in sensors, stretchable conductors, and responsive thermal interfaces.

Authors


  •   Yun, Guolin (external author)
  •   Tang, Shiyang
  •   Sun, Shuai
  •   Yuan, Dan (external author)
  •   Zhao, Qianbin (external author)
  •   Deng, Lei (external author)
  •   Yan, Sheng (external author)
  •   Du, Haiping
  •   Dickey, Michael (external author)
  •   Li, Weihua

Publication Date


  • 2019

Citation


  • Yun, G., Tang, S., Sun, S., Yuan, D., Zhao, Q., Deng, L., Yan, S., Du, H., Dickey, M. D. & Li, W. (2019). Liquid metal-filled magnetorheological elastomer with positive piezoconductivity. Nature Communications, 10 (1), 1-9.

Scopus Eid


  • 2-s2.0-85063316943

Number Of Pages


  • 8

Start Page


  • 1

End Page


  • 9

Volume


  • 10

Issue


  • 1

Place Of Publication


  • United Kingdom