The influence of HNTs on the mechanical properties, swelling resistance, and microstructural properties of nanocomposites based on silicone rubber

Abstract

Halloysite nanotubes (HNTs), an innovative material, were integrated into a silicone rubber (SR) matrix. This investigation aimed to assess the influence of varying HNTs concentrations on the curing behavior, mechanical properties, swelling resistance, and microstructural features of SR/HNTs nanocomposites. These nanocomposites were formulated by incorporating HNTs at different concentrations (0-10 phr) through a two-roll mill. The cure characteristics revealed an upsurge in maximum torque (MH) with escalating HNTs loading, accompanied by a decrease in cure time (t90) and scorch time (ts2). The abrasion resistance exhibited an increment with increasing HNTs loading, reaching optimal levels at 6 phr, and tensile characteristics demonstrated improvement up to this optimal loading. Morphological analysis illustrated the uniform dispersion of HNTs within the SR matrix, indicating a positive interaction between HNTs and silicone rubber.