学术报告

报告题目: Tunable Surface Properties of Soft Magnetoactive Elastomers

报告人: Irena Drevenšek-Olenik

     Faculty of Mathematics and Physics

     University of Ljubljana and J. Stefan Institute

     Ljubljana, Slovenia

时间：9月26日10:00

地点：泰达应用物理研究院四楼报告厅

Abstract:  Magnetoactive elastomers (MAEs) are composite materials assembled of magnetic microparticles embedded in elastomer matrix. We performed in-situ analysis of surface topographical modifications of soft magnetoactive elastomers in response to variable applied magnetic field. The analysis was based on optical microscopy, spread optical reflection and optical profilometry measurements. We found that magnetic field induces surface roughness changes in the range of 1 µm/T. A significant hysteresis of roughness modifications takes place for increasing an decreasing fields. We also investigated effect of magnetic field-induced  modifications of contact angle of water droplets deposited on the MAE surface. Despite increased surface roughness, the apparent contact angle decreases with increasing field. This effect is is attributed to field-induced protrusion of hydrophilic microparticles from the surface layer.

邀请人：张心正教授

欢迎各位老师和同学届时参加!