The influence of the selection of silicone rubber matrix on the properties of graphite nickel plated conductive silicone rubber

Graphite nickel plated conductive silicone rubberAs a high-performance composite material, it has shown broad application prospects in fields such as electronics, electrical appliances, aerospace, etc. Its performance is not only influenced by graphite nickel plated conductive fillers, but also highly dependent on the selection of silicone rubber matrix. This article aims to explore the influence of different silicone rubber substrates on the properties of graphite nickel plated conductive silicone rubber, and to conduct in-depth comparative analysis by citing relevant experimental data from Advanced Institute (Shenzhen) Technology Co., Ltd. and Research Platinum brand.

Characteristics of Silicone Rubber Matrix

Silicone rubber is a polymer elastomer with excellent heat resistance, cold resistance, aging resistance, and electrical insulation properties. The molecular chain of silicone rubber contains a large number of silicon oxygen bonds, which gives it low surface energy and good chemical stability. existconductive silicone rubberIn the preparation of silicone rubber, the choice of silicone rubber matrix directly affects the dispersion of fillers, the processing performance of composite materials, as well as the mechanical and electrical properties of the final product.

The Influence of Silicone Rubber Matrix on Electrical Conductivity

Experimental data and comparison

Experiment 1: The influence of different viscosity silicone rubber matrices

The research conducted by Advanced Institute (Shenzhen) Technology Co., Ltd. shows that the use of low viscosity silicone rubber matrix to prepareGraphite nickel plated conductive silicone rubberIts conductivity is superior to that of high viscosity substrates. This is because a low viscosity matrix is more conducive to the uniform dispersion of conductive fillers, reducing the contact resistance between fillers and thus improving the conductivity of composite materials. Specific experimental data shows that under the same nickel plating content on graphite, the volume resistivity of low viscosity matrix composites can be reduced to below 0.1 Ω· cm, while high viscosity matrix composites are difficult to achieve this level.

Experiment 2: The Influence of Silicone Rubber Matrix with Different Crosslinking Density

The research of Yanbo brand focuses on the influence of crosslinking density on conductivity. By adjusting the dosage of vulcanizing agent and vulcanization process, silicone rubber matrices with different crosslinking densities were prepared. The experimental results show that moderate crosslinking density is beneficial for achieving optimal conductivity. When the cross-linking density is too low, the matrix strength is insufficient and the filler network is unstable; Excessive cross-linking density may lead to poor dispersion of fillers in the matrix and increase contact resistance. Therefore, by optimizing the crosslinking density, the conductivity of conductive silicone rubber can be improved while ensuring its mechanical properties.

The influence of silicone rubber matrix on mechanical properties

The selection of silicone rubber matrix also has a significant impact on the mechanical properties of conductive silicone rubber. Generally speaking, a matrix with high viscosity and high cross-linking density is beneficial for improving the mechanical properties such as tensile strength, tear strength, and hardness of composite materials. However, excessive cross-linking density may also lead to material brittleness, reducing its elongation at break and toughness.

data comparison

Taking tensile strength as an example,Advanced Institute (Shenzhen) Technology Co., LtdResearch has shown that conductive silicone rubber prepared using a high viscosity silicone rubber matrix can increase its tensile strength by about 20% with the same nickel plating content on graphite. However, its elongation at break has decreased. In contrast, low viscosity matrix composite materials have slightly lower tensile strength but higher elongation at break, exhibiting better flexibility.

overall consideration

In practical applications, the selection of silicone rubber matrix needs to be balanced according to specific needs. For application scenarios that require high conductivity, a low viscosity silicone rubber matrix can be chosen and the filler dispersion process can be optimized; For situations that require high mechanical properties, it is advisable to consider using a high viscosity matrix and appropriately increasing the crosslinking density. In addition, the performance of conductive silicone rubber can be further improved by adding plasticizers, coupling agents, and other methods.

conclusion

In summary, the selection of silicone rubber matrix is importantGraphite nickel plated conductive silicone rubberThe performance has a significant impact. By optimizing parameters such as viscosity and cross-linking density of the matrix, the conductivity of conductive silicone rubber can be improved while ensuring its mechanical properties. In the future, with the continuous advancement of materials science and preparation technology, the performance of graphite nickel plated conductive silicone rubber will be further improved, providing strong support for applications in more fields.

The above data is for reference only, and specific performance may vary due to production processes and product specifications.