Adhesion Performance of the Multi-components Silicone-based Secondary Structure Cohesive Arrays with Large End

Base on the early researches, we vulcanized a viscous membrane on the end of the primary array by spin-coating, thus obtaining secondary structure cohesive arrays with large end. The results of adhesion performance show that, during the forward sliding course, the shear force of a single seta was about 5.3 mN, which was around 5.0 times of that from the naked seta; the shear force significantly changed with the varying component materials. The lean setae with large end had anisotropy adhesion property, and during the forward sliding course the shear adhesion force was 3.5 times greater than that during the backward slipping course.