Reconfigurable patterns on the surface of magneto-active elastomers

Matija Lovšin

Complex Matter Department, Jožef Stefan Institute

Abstract:

Magnetoactive elastomers are composite materials whose physical properties change under the influence of an external magnetic field. In the absence of a magnetic field, they are elastic, while in the magnetic field they become plastic. Based on this phenomenon, shape memory effect can be achieved. I analyzed the shape memory effect on the surface of magnetoactive elastomers. I embossed a periodic microstructure on the surface and analyzed optical diffraction from it as a function of the magnetic field. Based on those results, I obtained information on the depth of the imprinted structure as a function of the magnetic field and on the time dependence of surface restructuring after a rapid switch-off of the magnetic field. I found that the microstructural changes behave similarly to those previously observed on macroscopic samples.

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