Self-repairing liquid metal flexible electronic material capable of being completely recycled, and preparation method and application thereof

Abstract

The invention provides a self-repairing liquid metal flexible electronic material capable of being completely recycled, and a preparation method and application thereof, and belongs to the technical field of electronic materials. The self-repairing liquid metal flexible electronic material has a three-layer structure, the lower layer and the upper layer are made of a base material, and the middle layer is liquid metal; and the base material is a self-repairing polymer containing a disulfide bond. According to the electronic material, interaction between liquid metal and the flexible base material is achieved through the plasma surface treatment technology, and dual repairing of acting force, mechanical performance and electrical performance is achieved. Meanwhile, the self-repairing liquid metal flexible electronic material and an electronic device prepared from the self-repairing liquid metal flexible electronic material are low in cost and simple and convenient to operate; in addition, the electronic material disclosed by the invention has complete recoverability and is green and environment-friendly. The self-repairing liquid metal flexible electronic material and the electronic device prepared from the self-repairing liquid metal flexible electronic material are easy to popularize and apply on a large scale and have a good application prospect.

Description

technical field [0001] The invention belongs to the technical field of electronic materials, and in particular relates to a fully recyclable self-repairing liquid metal flexible electronic material and its preparation method and application. Background technique [0002] With the in-depth research on wearable intelligent detection equipment, intelligent robots, and human skin, the field of flexible electronic materials has ushered in rapid development. At present, the development of flexible electronic materials is still limited by their poor damage resistance, poor stability, and slow self-healing speed. Moreover, it is imminent to invent a fully recyclable flexible electronic material in the face of increasing environmental pressure. [0003] Liquid metal often refers to a metal material that maintains a liquid state at room temperature or even low temperature. It has the high electrical conductivity of traditional metal materials, and because of its low melting point, it...

AI Technical Summary

Problems solved by technology

Existing technologies mostly use general-purpose polymer flexible substrates such as silicone rubber, which cannot simultaneously achieve rapid self-healing, extreme damage resistance, and complete recycling

At the same time, the existing self-healing liquid metal flexible circuits are limited by the properties of the substrate, and cannot achieve mechanical damage repair of the substrate.

[0005] The paper "Design, Manufacture and Application of Flexible Electrode Circuit Based on Liquid Metal" (Master's Thesis of Shenzhen University, 2018) discloses a method for preparing flexible electronic devices, which etches microchannels on group materials and conducts plasma The method of body treatment and injection of liquid metal into the microchannel, the limitation of this method is that it cannot bear a large deformation, otherwise it will easily cause the leakage of liquid metal, and at the same time, it will cause irreversible damage when the liquid metal and the substrate are damaged. Self-healing cannot be achieved, and the damage resistance and reliability of the material need to be improved

[0006] Generally speaking, the liquid metal flexible electronic materials prepared by the existing technology have limitations such as loss of electrical properties under extreme damage, weak adhesion of liquid metal, slow self-repair speed, complicated preparation process, and inability to realize complete recovery of flexible electronic materials.

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