Abstract
Magnetoactive elastomers based on polydimethylsiloxane functional oligomers with a concentration of magnetic iron microparticles of 70, 75, and 80 wt % are synthesized. Soft samples with low (about 2 kPa) elastic moduli are obtained by introducing side chains into the polymer network without using a low molecular weight oil. It is shown that the rigidity of the matrix can be controlled by varying the concentration of only the crosslinking agent. The obtained magnetoactive elastomers have a high magnetic field response: the relative growth of the real part of the dynamic shear modulus of soft samples exceeds two orders of magnitude and reaches 400 in a magnetic field of 1 T. The contact angle of water with the surface of the composites increases to 140° in a magnetic field of the order of 400 mT.
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