Surface modification of carbonyl iron particles using dopamine and silane coupling agent for high-performance magnetorheological elastomers

Magnetorheological elastomers (MREs) are smart materials whose mechanical properties can quickly respond to changes in the external magnetic field. This phenomenon is known as magnetorheological (MR) effect and key application of elastomers. Previous studies have found that interface between particles a critical factor influencing MR MREs. To improve interfacial interaction silicone rubber (SR) carbonyl iron (CI) particles, MREs considered this work, CI were subjected surface modification through polydopamine (PDA) deposition n-dodecyltrimethoxysilane (DTMS) grafting. X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM) transmission (TEM) confirmed successful [email protected] coating layer with thickness about 30.6 nm. The tensile strength anisotropic increased by 31.5% after particles. study field induced viscoelastic showed based exhibited superior CI-based