How does the use of isobutyl (trimethoxy)silane (IBTMO) contribute to the performance of magnetorheological elastomers (MREs) containing carbonyl iron particles (CIP)?

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Topic
Isobutyl (trimethoxy)silane (IBTMO) is a silane coupling agent used to modify the surface of carbonyl iron particles (CIP) in magnetorheological elastomers (MREs). The modification aims to enhance the compatibility of CIP with the silicone-based matrix, thereby improving the overall performance of the MREs.
Answer
The use of IBTMO in the surface modification of CIP particles enhances their dispersion within the silicone matrix and strengthens the interfacial interactions between the particles and the polymer network. This results in improved mechanical properties, such as reduced elastic modulus and increased elongation at break, as well as a significant enhancement in the magnetorheological (MR) effect of the MREs. Specifically, anisotropic MREs based on dual-modified CIP achieved an MR effect of 246.8%, demonstrating the effectiveness of IBTMO in improving the performance of MREs.
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