Development of environmentally-friendly surface modification technology

Abstract

−185− Synthesiology English edition Vol.7 No.3 pp.185-193 (Dec. 2014) removal performance include the dynamic contact angle (advancing/receding contact angles of the droplet, assuming the droplet can move on the solid surface, and the contact angle hysteresis that is the difference between the advancing/ receding contact angles), and the critical angle (sliding angle) where a certain amount of droplet slides off the solid surface. The contact angle hysteresis and sliding angle ref lect the droplet removal performance more accurately, and it is actually widely recognized that the droplet removal performance is superior when the contact angle hysteresis or the sliding angle is smaller. These observations suggest that the evaluation of droplet removal performance of solid surfaces should be done using the dynamic contact angle as the index, rather than the conventional static contact angle.