1. Controllable hydrophobicity of magnetoactive elastomer coatings
- Author
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Elena Yu. Kramarenko, Gennady V. Stepanov, Bogdan O. Sokolov, and Vladislav V. Sorokin
- Subjects
Materials science ,02 engineering and technology ,engineering.material ,010402 general chemistry ,021001 nanoscience & nanotechnology ,Condensed Matter Physics ,Microstructure ,Elastomer ,Magnetorheological elastomer ,01 natural sciences ,0104 chemical sciences ,Electronic, Optical and Magnetic Materials ,Contact angle ,Neodymium magnet ,Carbonyl iron ,Coating ,Magnet ,engineering ,Composite material ,0210 nano-technology - Abstract
A series of magnetoactive elastomer (MAE) coatings consisting of a silicone matrix and carbonyl iron particles (3–5 μm in diameter) have been synthesized and their hydrophobic properties have been investigated in various magnetic fields of disk-shaped permanent NdFeB magnets. Concentration of magnetic filler in MAEs has been varied in the range of 63–76 mass%. Both isotropic samples and structured samples synthesized in the magnetic field of 80 mT have been obtained. It has been shown that application of a magnetic field induces structuring of the filler on the surface of MAE coatings, resulting in formation of mountain-like microstructures. Microstructure relief on coating surfaces leads to an increase of a water contact angle which could be varied from 110° ± 10° at zero field up to 163° ± 2° at 600 mT. The contact angle at the maximum field increases with iron filler content and with softening of the polymer matrix. more...
- Published
- 2018
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