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Liquid Metal Composites with Anisotropic and Unconventional Piezoconductivity

Journal Article


Abstract


  • Anisotropic elastic composites���that is, elastomers containing aligned fillers���often have enhanced properties in the direction of alignment. Depending on the fillers, these composites can have desirable electrical, thermal, or mechanical properties. Here, a silicone composite filled with both solid magnetic metal microparticles and liquid metal microdroplets has been developed. Aligning the solid particles within a magnetic field during curing imparts anisotropy in several properties. Thus, the composite is called an anisotropic liquid metal-filled magnetorheological elastomer (ALMMRE). Compared with isotropic liquid metal-filled composites, the conductivity of the ALMMRE is significantly enhanced in all directions. The ALMMRE also exhibits anisotropic piezoconductivity and a significantly enhanced electrical anisotropy under mechanical deformation; these properties are not observed in conventional anisotropic composites. The ALMMRE also shows anisotropic mechanical, thermal, and magnetic properties and demonstrates its several proof-of-concept applications. The sensitivity of the ALMMRE's properties to strain may help advance future flexible sensors and soft electronics.

UOW Authors


  •   Deng, Lei (external author)
  •   Yun, Guolin (external author)
  •   Lu, Hongda (external author)
  •   Deng, Lei
  •   Li, Weihua
  •   Sun, Shuai
  •   Tang, Shiyang (external author)
  •   Yuan, Dan (external author)

Publication Date


  • 2020

Published In


Citation


  • Yun, G., Tang, S. Y., Zhao, Q., Zhang, Y., Lu, H., Yuan, D., . . . Li, W. (2020). Liquid Metal Composites with Anisotropic and Unconventional Piezoconductivity. Matter, 3(3), 824-841. doi:10.1016/j.matt.2020.05.022

Scopus Eid


  • 2-s2.0-85087977023

Start Page


  • 824

End Page


  • 841

Volume


  • 3

Issue


  • 3

Place Of Publication


Abstract


  • Anisotropic elastic composites���that is, elastomers containing aligned fillers���often have enhanced properties in the direction of alignment. Depending on the fillers, these composites can have desirable electrical, thermal, or mechanical properties. Here, a silicone composite filled with both solid magnetic metal microparticles and liquid metal microdroplets has been developed. Aligning the solid particles within a magnetic field during curing imparts anisotropy in several properties. Thus, the composite is called an anisotropic liquid metal-filled magnetorheological elastomer (ALMMRE). Compared with isotropic liquid metal-filled composites, the conductivity of the ALMMRE is significantly enhanced in all directions. The ALMMRE also exhibits anisotropic piezoconductivity and a significantly enhanced electrical anisotropy under mechanical deformation; these properties are not observed in conventional anisotropic composites. The ALMMRE also shows anisotropic mechanical, thermal, and magnetic properties and demonstrates its several proof-of-concept applications. The sensitivity of the ALMMRE's properties to strain may help advance future flexible sensors and soft electronics.

UOW Authors


  •   Deng, Lei (external author)
  •   Yun, Guolin (external author)
  •   Lu, Hongda (external author)
  •   Deng, Lei
  •   Li, Weihua
  •   Sun, Shuai
  •   Tang, Shiyang (external author)
  •   Yuan, Dan (external author)

Publication Date


  • 2020

Published In


Citation


  • Yun, G., Tang, S. Y., Zhao, Q., Zhang, Y., Lu, H., Yuan, D., . . . Li, W. (2020). Liquid Metal Composites with Anisotropic and Unconventional Piezoconductivity. Matter, 3(3), 824-841. doi:10.1016/j.matt.2020.05.022

Scopus Eid


  • 2-s2.0-85087977023

Start Page


  • 824

End Page


  • 841

Volume


  • 3

Issue


  • 3

Place Of Publication