Elastic conductor and preparation method thereof

A technology of elastic substrate and conductor, applied in cable/conductor manufacturing, rod/rod/wire/strip conductor, and equipment for manufacturing conductive/semiconductor layers, etc., can solve the problems of low production efficiency and stretchable conductors And other issues

Active Publication Date: 2020-07-14
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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  • Elastic conductor and preparation method thereof
  • Elastic conductor and preparation method thereof
  • 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 figure 1 As shown, an elastic matrix 6 and liquid metal 7 are included. The elastic substrate 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 base 6 and is in a continuous spiral winding shape around the periphery of the elastic base 6. The included 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 figure 2 As shown, including the following steps:

[0035] Step 1: Such as figure 2 As shown, the liquid metal 3 and copper powder 4 are placed in a mortar 1 and ground with a pestle 2 for one hour. The mass ratio of the liquid metal to the copper powder is 9:1 to obtain the liquid metal doped with copper powder. Vacuum with a vacuum pump until there are no pores ...

Embodiment 2

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

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

[0042] Step 3: Rotate the winding machine 60 times clockwise to obtain a threaded TPE rubber tube; coat the threaded TPE rubber tube with the liquid metal doped with copper powder prepared in step 1, and the liquid metal adheres to the surface of the elastic substrate. Linear.

[0043] Step 4: Fix the threaded TPE rubber tube with liquid metal doped with copper powder on the winding machine 5 obtained in Step 3, and the winding machine rotates 60 times counterclockwise to obtain a continuous liquid metal around the elastic substrate. Spiral orbit, and the angle between the liquid metal and the refe...

Embodiment 3

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

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

[0047] Step 3: Rotate the winding machine 90 times clockwise to obtain a threaded TPE rubber tube; coat the threaded TPE rubber tube with the liquid metal doped with copper powder prepared in step 1, and the liquid metal adheres to the surface of the elastic substrate. Linear.

[0048] Step 4: Fix the threaded TPE rubber tube with liquid metal doped with copper powder on the winding machine 5 obtained in Step 3, and the winding machine rotates 90 times counterclockwise to obtain a continuous liquid metal around the elastic substrate. Spiral winding, and the included angle between the liquid metal a...

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Abstract

The invention discloses an elastic conductor and a preparation method thereof. The elastic conductor comprises an elastic base body and liquid metal, wherein the elastic base body is non-conductive, and the liquid metal is attached to the surface of the elastic base body and is in a continuous spiral winding shape on the periphery of the elastic base body. The elastic conductor is prepared by adopting a torsion forming process. When the elastic conductor is stretched and deformed, the resistance change rate is small, and the elastic conductor 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. The academic progress of stretchable sensors, stretchable printed circuit boards, stretchable batteries, electronic skins, 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 and non-conductive elastic polymer mixtures, and based on special geometric structures, such as horseshoe-shaped circuit, metal Thin film or pre-strained polydimethylsiloxane (PDMS) conductive silver nanowire film, spring-like conductive fibe...

Claims

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Application Information

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Patent Type & Authority Applications(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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