Preparation of Electromagnetic Shielding Coating Based on Natural Rubber

In this study, natural rubber-based electromagnetic shielding materials for coating application were made. Expanded graphite was prepared using our method and dispersed in the polyaniline/natural rubber matrix. The effect of PAni and expanded graphite on the properties of resulting materials was evaluated. The characterization of properties that are important for an electromagnetic shielding coating (i.e., mechanical properties, electromagnetic shielding, wettability resistance, thermal properties, and the morphology of the material) was investigated. The result shows that the properties of natural rubber/polyaniline blends are enhanced owing to the presence of expanded graphite. The superior properties are achieved when the amount of added expanded graphite in natural rubber/polyaniline is 5 parts per 100 g of natural rubber. The enhancement of properties is attributed to the good dispersion of expanded graphite in the natural rubber/polyaniline matrix, which improves the compatibility of the natural rubber and polyaniline phase.