Preparation method of flexible high-conductivity elastomer composite material

Abstract

The invention relates to a high-conductivity elastomer composite material prepared by microscopically constructing a conductive network and a preparation method of the high-conductivity elastomer composite material, and belongs to the field of preparation of flexible conductive composite materials, and the flexible conductive material has the characteristic of stable conductivity under deformation. The preparation method comprises the following steps: swelling an SBS elastic matrix membrane by using a silver salt solution, introducing a large amount of conductive precursor Ag+ to be reduced into an elastomer matrix, reducing the swollen elastomer to reduce a large amount of silver ions inside and on the surface of the elastomer into nano-silver particles, taking out the nano-silver particles, and drying the nano-silver particles to obtain the SBS elastic matrix membrane, wherein the conductive nano-silver particles are tightly compressed along with the reduction of the drying volume toform a compact and folded conductive surface coating and an internal conductive network. The composite material prepared by the method solves the problems of aggregation and low content of the conductive filler in the matrix, can improve the resistance stability in the stretching process while improving the conductivity, can well reserve the mechanical properties of the SBS, and has the advantages of simple operation and wide application prospects.

Description

technical field [0001] The invention relates to a method for preparing a high-conductivity elastomer composite material by constructing a conductive network at the microscopic level, and belongs to the technical field of composite material preparation. Background technique [0002] In recent years, with the continuous development of electronic information technology, electronic devices are also moving toward miniaturization and lightweight development. Highly conductive elastomer composites have received extensive attention due to their good flexibility and large deformation. As a highly conductive material, nano-silver particles can effectively improve the electrical conductivity of the composite material. However, due to the low content of conductive fillers and uneven dispersion, the electrical conductivity decreases significantly and the impedance increases significantly during stretching (poor electrical stability). Highly conductive elastomer composites with silver na...

AI Technical Summary

Problems solved by technology

Using the solution to dissolve the elastic matrix and the inorganic conductive filler at the same time, and then casting and heating together to remove the solvent and lay the film, so that the inorganic conductive filler can be directly introduced into the matrix, which simply and effectively improves the conductivity of the elastic matrix. However, the inorganic conductive filler is in The dispersion inside the matrix is ​​not uniform, and the impedance changes greatly during the stretching process (poor electrical stability)

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