A kind of elastic conductor and preparation method thereof

A technology of elastic matrix and conductor, which is applied in the direction of cable/conductor manufacturing, root rod/rod/wire/strip conductor, equipment for manufacturing conductive/semiconductive layer, etc., which can solve the problem of low production efficiency and stretchable conductor and other problems, to achieve good deformation ability and good conductivity

Active Publication Date: 2021-08-17
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, how to prepare stretchable conductors based on geometric structures is a technical problem
With the development of printed electronics technology, it is possible to prepare circuits on the irregular surface of three-dimensional objects by 3D printing, laser direct structure and other methods, but in terms of point-to-point technology, both 3D printing and LDS technology are facing the problem of low production efficiency
In addition, there are still technical bottlenecks in the preparation of circuits on flexible materials

Method used

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  • A kind of elastic conductor and preparation method thereof
  • A kind of elastic conductor and preparation method thereof
  • A kind of elastic conductor and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] In this embodiment, the elastic conductor structure is as follows figure 1 As shown, the elastic matrix 6 and the liquid metal 7 are included. The elastic base 6 is a thermoplastic rubber tube (TPE), and the liquid metal 7 is a gallium indium tin alloy doped with copper powder. The liquid metal 7 is attached to the surface of the elastic substrate 6 and is in a continuous spiral winding shape around the periphery of the elastic substrate 6. The angle α between the liquid metal and the reference line parallel to the central axis of the spiral winding is 120°.

[0034] The preparation process of the elastic conductor is as follows: figure 2 shown, including the following steps:

[0035] Step 1: As figure 2 As shown, put the liquid metal 3 and the copper powder 4 in the mortar 1 and use the mortar and pestle 2 to grind for one hour. Evacuate with a vacuum pump until there are no pores on the surface, and obtain a stable liquid metal 7 doped with copper powder that ca...

Embodiment 2

[0040] In this embodiment, the structure of the elastic conductor is basically the same as that in Embodiment 1, the difference is that the angle α between the liquid metal and the reference line parallel to the central axis of the spiral winding is 110°.

[0041] The preparation process of the elastic conductor is basically the same as that of Example 1, except that Step 3 and Step 4 are as follows:

[0042] Step 3: The winding machine is rotated clockwise for 60 times to obtain a threaded TPE rubber tube; the liquid metal doped with copper powder obtained in Step 1 is coated on the threaded TPE rubber tube, and the liquid metal is attached to the surface of the elastic substrate, showing a straight.

[0043] Step 4: Fix the threaded TPE rubber tube with liquid metal doped with copper powder on the surface obtained in Step 3 on the winding machine 5, and rotate the winding machine 60 times counterclockwise to obtain a continuous liquid metal on the periphery of the elastic ma...

Embodiment 3

[0045] In this embodiment, the structure of the elastic conductor is basically the same as that in Embodiment 1, the difference is that the angle α between the liquid metal and the reference line parallel to the central axis of the spiral winding is 100°.

[0046] The preparation process of the elastic conductor is basically the same as that of Example 1, except that Step 3 and Step 4 are as follows:

[0047] Step 3: The winding machine is rotated 90 times clockwise to obtain a threaded TPE rubber tube; the liquid metal doped with copper powder obtained in Step 1 is coated on the threaded TPE rubber tube, and the liquid metal is attached to the surface of the elastic substrate in the form of a straight.

[0048] Step 4: Fix the threaded TPE rubber tube with the liquid metal doped with copper powder on the surface obtained in Step 3 on the winding machine 5, and rotate the winding machine 90 times counterclockwise to obtain a continuous liquid metal on the periphery of the elasti...

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Abstract

The invention discloses an elastic conductor and a preparation method thereof. The elastic conductor includes an elastic matrix and liquid metal, the elastic matrix is ​​non-conductive, the liquid metal adheres to the surface of the elastic matrix, and forms a continuous helical winding around the periphery of the elastic matrix. The invention adopts twist forming process to prepare the elastic conductor. When the elastic conductor is stretched and deformed, the resistance change rate is small, and it has potential application value in flexible electronic devices.

Description

technical field [0001] The invention relates to the technical field of flexible electronics, in particular to an elastic conductor and a preparation method thereof. Background technique [0002] The application of stretchable electronic products in daily life has attracted more and more attention. Academic progress in stretchable sensors, stretchable printed circuit boards, stretchable batteries, electronic skin, etc. indicates that stretchable devices have broad market prospects in the fields of health monitoring, smart textiles, and wearable displays. [0003] At present, stretchable conductors are mainly based on composite materials, such as silver nanowires, metal nanoparticles, carbon nanotubes, graphene and other conductive fillers mixed with non-conductive elastic polymers, as well as on special geometries such as horseshoe circuits, metal Conductive silver nanowire films, spring-like conductive fibers, etc. on thin films or pre-strained polydimethylsiloxane (PDMS). ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01B5/04H01B5/14H01B13/00
CPCH01B5/04H01B5/14H01B13/00H01B13/0026
Inventor 刘宜伟曹鹏娟李法利李润伟
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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