Conductive silicon rubber material with ultralow compressive deformation and low hardness and preparation method thereof

Abstract

The invention relates to a conductive silicon rubber material with ultralow compressive deformation and low hardness and a preparation method thereof and belongs to the technical field of conductive silicon rubber materials. The rubber material is prepared by filling conductive fillers with different shape factors so as to ensure that a network passage is formed under the condition of low-usage conductive filler. The rubber material comprises the following ingredients in parts by mass: 100 parts of silicon rubber, 1-15 parts of vulcanizing agent, 0 or 1-8 parts of vulcanizing assistant, 5-15 parts of carbon black and 0.5-5 parts of carbon nanotubes. According to the material, the material is endowed with higher conductivity under the condition that lower compression permanent deformation and lower hardness are guaranteed; the preparation process is simple, and the cost is low; and through testing the electrical and mechanical properties of the material, the conductive silicon rubber material has the following properties: the Shore A hardness is not higher than 50, the 25% constant compression permanent deformation is not higher than 10% (100 DEG C * 24 h), the instantaneous resilience performance is not lower than 60%, and the volume resistivity is not higher than 50 omega.cm.

Description

technical field [0001] The invention belongs to the technical field of conductive silicon rubber materials, and in particular relates to a conductive silicon rubber material with extremely low compression deformation and low hardness and a preparation method thereof. Background technique [0002] The main function of conductive rubber is to seal and prevent electromagnetic leakage, so good electrical conductivity, low hardness and pressure change are necessary properties for conductive rubber composite materials. Silicone rubber has excellent heat aging resistance and weather resistance, and the molecular chain is very flexible, and the interaction force between the chains is weak, so that it has great flexibility and elasticity after vulcanization. These unique properties make silicone rubber widely used in the field of preparing conductive rubber. At present, my country's research on conductive rubber is still in its infancy compared with other developed countries, and it...

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Problems solved by technology

Tian Ming, Yan Shani, etc. applied for the publication of the invention patent No.CN102604388A. Modified metal-plated fibers and modified metal-plated particles or graphene are used to fill silicone rubber, but the percolation value of the system is relatively large, and good conductivity must be achieved. It is necessary to increase the filling amount of fillers, which will cause the hardness and compression set of the compound to be too large, and the fillers need to be modified, which makes the preparation process complicated and the cost increased