Effect of Material Composition on Tunable Surface Roughness of Magnetoactive Elastomers

摘要: We investigated magnetic-field-induced modifications of the surface roughness magnetoactive elastomers (MAEs) with four material compositions incorporating two concentrations ferromagnetic microparticles (70 wt% and 80 wt%) exhibiting shear storage moduli resulting composite (about 10 kPa 30 kPa). The analysis was primarily based on spread optical reflection measurements. surfaces all materials were found to be very smooth in absence magnetic field (RMS below 50 nm). A maximal field-induced modification (approximately 1 μm/T) observed for softer lower filler concentration, a minimal (less than nm/T) harder higher concentration. All showed significant decrease total reflectivity an increasing as well. This effect is attributed existence distinct layer that depleted but becomes filled particles presence field. analyzed temporal response reflective properties switching off switching-on times around 0.1 s switching-off range 0.3⁻0.6 s. These observations provide new insight into restructuring MAEs may useful development magnetically reconfigurable elastomeric surfaces.