Investigation of magnetic field induced structuring of soft magnetoactive elastomers.
The purpose of this proposal is to provide experimental evidence for formation of chain-like magnetic-particle structures in highly filled magnetorheological (MR) elastomers (MREs) and magnetorheological fluids under external magnetic fields. The elastomeric samples will consist of carbonyl iron particles (diameter about 4 - 5 µm) embedded into a compliant silicone matrix. Another set of samples will consist of MR fluids based on a polycarbosilane matrix (or similar) and iron microparticles. Using MR fluids, it can be verified if the formation of chains depends on the carrier medium. Similarly to MR fluids, the change in MR properties is thought to be due to the magnetic polarization induced in each particle by the external field, with the resulting interaction forces between the particles leading to the formation of elongated aggregates in the direction of the field. If an external magnetic field is applied to the MRE composite, the magnetic filler particles may move inside the compliant polymer matrix and build magnetic-network aggregates. We are interested in verifying this hypothesis.
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Mikhail Shamonin; KLEPP Juergen; KRAMARENKO Elena and LEMMEL Hartmut. (2018). Investigation of magnetic field induced structuring of soft magnetoactive elastomers.. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.1-04-130
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