A kind of preparation method of elastic conductor

An elastomer and elastic technology, applied in cable/conductor manufacturing, electrical components, circuits, etc., can solve the problems of complex preparation methods and difficult actual preparation of flexible wires, and achieve enhanced dynamic electrical stability, good dynamic electrical stability, Good effect of resistance recovery performance

Active Publication Date: 2020-05-08
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

However, the preparation method of the flexible wire is relatively complicated, which brings difficulties to the actual preparation.

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] In this embodiment, the liquid metal is GaInSn, which is an alloy whose mass ratio is Ga:In:Sn=68.2:21.8:10. The liquid metal is liquid at room temperature and has high conductivity; the elastomer is polydimethyl Silicone (PDMS), a thermosetting polymer.

[0028] In this example, the preparation method of the elastic conductor is as follows:

[0029] (1) Mechanically stir the GaInSn alloy, PDMS, and curing agent evenly, so that the liquid metal droplets are evenly dispersed in the PDMS to obtain a mixture, wherein the volume ratio of the GaInSn alloy to PDMS is 20:80, that is, the volume ratio is 25%;

[0030] (2) Pour the mixture into a mold with a depth of 2mm. Let the mold containing the mixture stand for 1 hour to remove the air bubbles in the mixture and deposit the liquid metal, then put it into a drying oven at 60°C and heat it for 3h-4h to solidify the PDMS in the mixture, and take out the sample after cooling to obtain elastic conductor.

[0031] The scannin...

Embodiment 2

[0036] In this embodiment, the liquid metal is the same as that in Embodiment 1, the elastomer is the same as that in Embodiment 1, and the curing agent is the same as that in Embodiment 1.

[0037] In this example, the preparation method of the elastic conductor is basically the same as that in Example 1, except that in step (1), the volume ratio of GaInSn alloy to PDMS is 5%.

[0038]The scanning electron micrographs of the above-mentioned elastic conductors are similar to figure 2 As shown, the elastic conductor has a two-layer structure, the lower layer is the support layer, and the upper layer is the conductive layer. In the conductive layer, the special structure of liquid metal in the shape of gourd strings is filled in the elastic body to form a connected conductive channel.

[0039] Detect the resistance change of the elastic conductor prepared above when the tensile stress is loaded and unloaded, and the results show that:

[0040] (1) The elastic conductor has goo...

Embodiment 3

[0043] In this embodiment, the liquid metal is the same as that in Embodiment 1, the elastomer is the same as that in Embodiment 1, and the curing agent is the same as that in Embodiment 1.

[0044] In this example, the preparation method of the elastic conductor is basically the same as that in Example 1, except that in step (1), the volume ratio of GaInSn alloy to PDMS is 10%.

[0045] The scanning electron micrographs of the above-mentioned elastic conductors are similar to figure 2 As shown, the elastic conductor has a two-layer structure, the lower layer is the support layer, and the upper layer is the conductive layer. In the conductive layer, the special structure of liquid metal in the shape of gourd strings is filled in the elastic body to form a connected conductive channel.

[0046] Detect the resistance change of the elastic conductor prepared above when the tensile stress is loaded and unloaded, and the results show that:

[0047] (1) The elastic conductor has g...

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Abstract

The invention provides a preparation method of an elastic conductor. The preparation method comprises the steps of uniformly mixing liquid metal and a melted elastic body to form a mixed body, whereinthe volume ratio of the liquid metal and the elastic body in the mixed body is 10%-70%; pouring the mixed body into a die for standing for a certain time; and curing to form the elastic conductor. The method is simple and practical and is low in cost, the prepared elastic conductor is divided into an upper layer and a lower layer, the upper layer is a pure elastic body, the lower layer is a mixedlayer of the elastic body and the liquid metal, liquid metal particles in the mixed layer fill the elastic body in a gourd string shape to form an electrical connection structure, and the elastic conductor has high conductivity, high stretchability and dynamic electrical stability.

Description

technical field [0001] The invention relates to the technical field of flexible electronics, in particular to a method for preparing an elastic conductor. Background technique [0002] In recent years, the development of wearable electronic devices based on flexible electronics has attracted extensive attention. As an indispensable basic component of wearable electronic devices, elastic conductors have an important impact on the performance and efficiency of wearable electronic devices. [0003] Elastic conductors can be divided into several categories according to different conductive fillers: carbon materials, metal materials, conductive polymers, and solid conductive mixtures of two or more. At present, some research results have shown that the properties of elastic conductors can be significantly improved, such as electrical conductivity, stretchability and fatigue properties. However, it is difficult for existing elastic conductors to simultaneously achieve high condu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01B13/00
CPCH01B13/00
Inventor 尚杰王玉欣李润伟刘宜伟郁哲
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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