화학공학소재연구정보센터
Journal of Colloid and Interface Science, Vol.515, 32-38, 2018
Contact angle hysteresis effect on the thermocapillary migration of liquid droplets
Thermocapillary migration describes a phenomenon where a liquid droplet spreads from warm to cold regions due to the interfacial tension gradients. Since the contact angle hysteresis effect is involved during the migration process, we consider the hysteresis effect and rectify the theoretical model to predict the migration velocity on solid surfaces. By conducting migration experiments on surfaces with different magnitudes of the hysteresis effect, we verify the validity of the theoretical derivation. This study advances the understanding of the interfacial phenomenon of thermocapillary migration, moreover, offers an insight into the migration capacity of different materials and guides the design of key components associated with the thermal gradients. (C) 2018 Elsevier Inc. All rights reserved.