磁响应聚二甲基硅氧烷阵列表面水滴的定向去除

In this paper,superhydrophobic low-adhesive magnetically responsive polydimethylsiloxane(PDMS) columnar arrays(SMPA)were prepared by combination of template method and surface modification. The columnar arrays can undergo reversible bending deformation under the action of the magnetic field,and the degree of bending will increase with the increase of the strength of the applied magnetic field and the increase of the content of magnetic particles in the columnar arrays. The findings indicate that,when the surface area of the columnar arrays remains constant,the dynamic magnetic response structure exhibits enhanced capability in removing smaller water droplets from the surface compared to its static counterpart,and droplets departure direction and volume are closely related to the structural parameters and bending angle of the columnar arrays. Based on the magnetic field,smart control of droplets jumping in both departing direction and droplets volume can be achieved.