Author : Seung Won Oh
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (133 download)
Book Synopsis BIO-INSPIRED, DYNAMIC MICROTOPOGRAPHY SURFACES FOR WETTING CONTROL. by : Seung Won Oh
Download or read book BIO-INSPIRED, DYNAMIC MICROTOPOGRAPHY SURFACES FOR WETTING CONTROL. written by Seung Won Oh and published by . This book was released on 2017 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Controlling the wettability of solid surfaces has been a fundamental topic in the realm of surface engineering. Although previous research in this field has examined the connection between wetting properties and static solid surfaces for various surface structures and chemical compositions, few studies have examined how wetting behaviour is affected by dynamic changes in surface structures. In this study, we can dynamically control the wetting properties of superhydrophobic surfaces via microfluidic channels and digitally-controlled pneumatic pressure. We have designed a bio-inspired, multi-layer microfluidic polydimethylsiloxane device with micropillar array surfaces (7.5-10 Âľm diameter) that can be mechanically deformed to dynamically change the pillar spacing (pitch) and orientation. We show that the static contact angle, the adhesion force of droplet, roll-off angle, dynamic control of surface wetting (catch-and-release, direction control, merge-and-mix) and selective transition of wetting state (from Cassie-Baxter to Wenzel) can reliably be influenced by the topographic deformation.