3D打印聚氨酯微流道封装镓基液态金属柔性导线及其性能

doi:10.11896/cldb.20080168

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Abstract Flexible liquid metal wires were fabricated by the injection and encapsulation of GaInSn liquid metal TPU into flexible polyurethane microchannels fabricated by 3D printing. Morphology and composition of GaInSn liquid metal were characterized by scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDS). A multimeter and an electrochemical workstation were used to test the conductive properties of flexible wires of different sizes under the action of the liquid metal in the complex flow channel and external forces, and compared with commercial FPCs to test the fatigue resistance of the flexible wires under repeated bending and double folding. The results show that the liquid metal is composed of 67.2% Ga, 20.1% In and 12.7% Sn by mass. It can be combined with TPU flexible material to prepare a multilayer complex structure circuit; under pressure (0—190 N) and bending deformation (0—360°), the external force has basically no effect on the conduction performance of the liquid metal flexible wire. Among them, when the cross-sectional dimension of the micro-channel is 0.5 mm×0.5 mm, the external force has the least influence on it; compared with commercial FPC, the metal flexible wire did not break under the condition of cyclic bending for 24 hours and double folding and compacting 200 times, and its resistance increased by only 0.02 Ω; it showed the huge application potential of liquid metal in the field of complex flexible circuit manufacturing.

Key words： 3D printing polyurethane microchannel liquid metal flexible wire

Published: 12 November 2021

CLC number:

TG178

Fund:Guangxi Special Fund Project for Innovation-Driven Development (AA17204021-7) and Key Project of Guangxi Science and Technology Plan (AB17292017).

Corresponding Authors: luokun@cczu.edu.cn

About author:: Jiye Geng received his B.E. degree in polymer mate-rials and engineering from College of Technology, Hubei Engineering University in 2018. He is currently pur-suing his master degree under supervision of professor Kun Luo at Guilin University of Technology. His research interest is mainly focused on metallurgical engineering.
Kun Luo obtained his M.S. and Ph.D. degrees in materials science and engineering from Chinese Academy of Science in 2000 and 2004, respectively. He worked in Guilin University of Technology from 2008 to 2018, and in Changzhou University now. He focuses on new energy storage materials and has published more than 100 research papers in journals such as Adv. Mater., Chem. Commun., Chem. Mater., J. Mater. Chem. A., et al.

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	GENG Jiye
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Cite this article:

GENG Jiye,LAN Jiaxin,LIU Tong, et al. Fabrication and Properties of Flexible Gallium-based Liquid Metal Wires Encapsulated in 3D Printed Polyurethane Microchannel[J]. Materials Reports, 2021, 35(20): 20040-20044.

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http://www.mater-rep.com/EN/10.11896/cldb.20080168 OR http://www.mater-rep.com/EN/Y2021/V35/I20/20040

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