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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ACKNOWLEDGMENTS
GPC and NMR investigation was made using the equipment of the Collaborative Access Center “Center for Polymer Research” of ISPM RAS.
Funding
This study was supported by the Russian Science Foundation (project no. 19-13-00340). The study of contact angles was supported by the Russian Foundation for Basic Research (project code 16-29-05276).
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Kostrov, S.A., Gorodov, V.V., Sokolov, B.O. et al. Low-Modulus Elastomeric Matrices for Magnetoactive Composites with a High Magnetic Field Response. Polym. Sci. Ser. A 62, 383–391 (2020). https://doi.org/10.1134/S0965545X20040082
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DOI: https://doi.org/10.1134/S0965545X20040082