Design and Optimization of NR-Based Stretchable Conductive Composites Filled with MoSi₂ Nanoparticles and MWCNTs:...

Stretchable conductive composites play a pivotal role in the development of personalized electronic devices, electronic skins, and artificial implant devices. This article explores the fabrication and characterization of stretchable composites based on natural rubber (NR) filled with molybdenum disilicide (MoSi₂) nanoparticles and multi-walled carbon nanotubes (MWCNTs). Experimental characterization and molecular dynamics (MD) simulations are employed to investigate the static and dynamic properties of the composites, including morphology, glass transition temperature (T_g), electrical conductivity, and mechanical behavior. Results show that the addition of MoSi₂ nanoparticles enhances the dispersion of MWCNTs within the NR matrix, optimizing the formation of a conductive network. Dynamic mechanical analysis (DMA) confirms the T_g reduction with the addition of MWCNTs and the influence of MoSi₂ content on T_g. Mechanical testing reveals that the tensile strength increases with MoSi₂ content, with an optimal ratio of 4:1 MoSi₂:MWCNTs. Electrical conductivity measurements demonstrate that the MoSi₂/MWCNTs/NR composites exhibit enhanced conductivity, reaching optimal values at specific filler ratios. MD simulations further support experimental findings, highlighting the role of MoSi₂ in improving dispersion and mechanical properties. Overall, the study elucidates the synergistic effects of nanoparticles and nanotubes in enhancing the properties of stretchable conductive composites.