Fabrication and Testing of Self Cleaning Dry Adhesives Utilizing Hydrophobicity Gradient

作     者：Enrico Bovcro Jeffrey Krahn Carlo Menon 

作者机构：MENRVA Lab School of Engineering Science Simon Fraser University 8888 University Drive Burnaby BC Canada V5A 1S6 

出 版 物：《Journal of Bionic Engineering》 (仿生工程学报（英文版）)

年 卷 期：2015年第12卷第2期

页      面：270-275页

核心收录：

学科分类：0832[工学-食品科学与工程（可授工学、农学学位）] 081702[工学-化学工艺] 08[工学] 0817[工学-化学工程与技术] 083202[工学-粮食、油脂及植物蛋白工程] 

基　　金：supported by the Natural Sciences and Engineering Research Council of Canada 

主　　题：dry adhesion self cleaning hydrophobic silanization polymers PDMS 

摘      要：In this paper we present a method to create a hydrophobicity gradient on the surface of a Polydimethylsiloxane （PDMS） dry adhesive. The method consists of the partial silanization of the surface of the dry adhesive by Chemical Vapour Deposition （CVD） of octadecyltrichlorosilane （OTS）. The partial silanization of the surface of the sample results in a hydrophobic to hy- drophilic gradient across the surface of the dry adhesive. The resulting change in hydrophobicity across the surface of the dry adhesive results in the uphill motion of a droplet of water, which appears to be directly proportional to the area of contact between the droplet and the adhesive. Normal adhesion testing is performed to quantify the effect of the hydrophobic gradient across the surface of the sample. While a variation in adhesion are only minimally affected by the silanization, and the motion strength across the sample is measured, the adhesive properties of the droplet of water doesn＇t cause any loss of adhesion.