Mechanical, Electrical, and Oil-Resistance Properties of Fluorosilicone Rubber/Silver-Coated Aluminum Powder Composites

In addition to electromagnetic-shielding effectiveness, the mechanical properties of electromagnetic-shielding rubber are crucial in practical applications. Herein, electromagnetic-shielding rubber is prepared by incorporating silver-coated aluminum (SCA) powder into fluorosilicone rubber (FVMQ) using a mechanical-blending method. In particular, this study focuses on the mechanical, electrical, and oil-resistance properties of FVMQ/SCA composites, as influenced by the contents of SCA powder and silica and cross-linking density. Results reveal that the electromagnetic-shielding effectiveness of FVMQ/SCA composites is closely associated with their conductivity. Increases in the SCA powder content, silica content, and cross-linking density enhance the electrical properties. These factors also affect the mechanical properties; the composites exhibit optimal tensile properties for 6.6 wt.% silica content and a 2:1 content ratio of 2,5-dimethyl-2,5-di(tert-butylperoxy) hexane:triallyl isocyanurate. The contents of SCA powder and silica pose a minimal impact on oil resistance, whereas an increase in cross-linking density enhances the oil resistance of the composites. Moreover, the composites exhibit conductive stability. The FVMQ/SCA composites with enhanced mechanical and oil-resistant properties will offer practical benefits for industries requiring reliable electromagnetic shielding in oily environments, such as aerospace and automotive sectors.