Journal Article

FZJ-2021-03877

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Conductance-stable liquid metal sheath-core microfibers for stretchy smart fabrics and self-powered sensing

Zheng, L. ; Zhu, M. ; Wu, B.FZJ* ; Li, Z. ; Sun, S. (Corresponding author) ; Wu, P. (Corresponding author)

2021
Assoc. Washington, DC [u.a.]

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Please use a persistent id in citations: http://hdl.handle.net/2128/29019  doi:10.1126/sciadv.abg4041

Abstract: Highly conductive and stretchy fibers are crucial components for smart fabrics and wearable electronics. However, most of the existing fiber conductors are strain sensitive with deteriorated conductance upon stretching, and thus, a compromised strategy via introducing merely geometric distortion of conductive path is often used for stable conductance. Here, we report a coaxial wet-spinning process for continuously fabricating intrinsically stretchable, highly conductive yet conductance-stable, liquid metal sheath-core microfibers. The microfiber can be stretched up to 1170%, and upon fully activating the conductive path, a very high conductivity of 4.35 × 104 S/m and resistance change of only 4% at 200% strain are realized, arising from both stretch-induced channel opening and stretching out of tortuous serpentine conductive path of the percolating liquid metal network. Moreover, the microfibers can be easily woven into an everyday glove or fabric, acting as excellent joule heaters, electrothermochromic displays, and self-powered wearable sensors to monitor human activities.

Keyword(s): Polymers, Soft Nano Particles and Proteins (1st) ; Chemistry (2nd) ; Materials Science (2nd) ; Soft Condensed Matter (2nd)

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Contributing Institute(s):

1. JCNS-4 (JCNS-4)
2. Neutronenstreuung (JCNS-1)
3. JCNS-FRM-II (JCNS-FRM-II)
4. Heinz Maier-Leibnitz Zentrum (MLZ)

Research Program(s):

1. 6G4 - Jülich Centre for Neutron Research (JCNS) (FZJ) (POF4-6G4) (POF4-6G4)
2. 632 - Materials – Quantum, Complex and Functional Materials (POF4-632) (POF4-632)

Experiment(s):

1. No specific instrument

Appears in the scientific report 2021

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