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

ABSTRACT 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.