Cooperative Optimization Strategy for the Electrical and Mechanical Properties of Silicone Rubber Composites During Aging

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Experimental and simulation methods reveal that nano-SiO2 doping improves aging resistance and mechanical strength in silicone rubber composites.

Samples doped with 10 wt% SiO2 exhibit tensile strength and elongation at break twice that of pure silicone rubber.
After aging, the breakdown field strength of SiO2-doped silicone rubber reaches 22.6 kV/mm, outperforming undoped silicone rubber.
An optimal amount of SiO2 forms a dense cross-linked network, enhancing performance by reducing chain segment slippage and charge injection.
Excessive SiO2 doping leads to defects that weaken performance, emphasizing the need for balance in doping levels.

Sun et al. (2025) studied this question.

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Experimental and simulation methods reveal that nano-SiO2 doping improves aging resistance and mechanical strength in silicone rubber composites.