Contact angle hysteresis |
| |
| Institution: | 1. Max Planck Institute for Polymer Research, Ackermannweg 10, 55128, Mainz, Germany;2. Tokyo Institute of Technology, Earth Life Science Institute, Chemical Evolution Laboratory Unit, Tokyo, Japan;3. Institute for Fluid Mechanics and Aerodynamics, Technische Universität Darmstadt, Alarich-Weiss-Straße 10, 64287, Darmstadt, Germany;1. National Institute for Physiological Sciences, 38 Nishigonaka, Myodaiji, Okazaki 444-8585, Japan;2. Department of Chemical and Pharmaceutical Engineering, Faculty of Chemistry and Pharmacy, Sofia University, Sofia 1164, Bulgaria;1. Mechanical Engineering Department, University of Canterbury, Christchurch, New Zealand;2. Environmental Science and Research (ESR), Christchurch, New Zealand;1. Department of Engineering Mechanics, Tsinghua University, Beijing 100084, China;2. Center for Nano and Micro Mechanics, Tsinghua University, Beijing 100084, China;3. State Key Laboratory of Tribology, Tsinghua University, Beijing 100084, China;4. Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China |
| |
| Abstract: | In thermodynamic equilibrium, the contact angle is related by Young's equation to the interfacial energies. Unfortunately, it is practically impossible to measure the equilibrium contact angle. When for example placing a drop on a surface its contact angle can assume any value between the advancing Θa and receding Θr contact angles, depending on how the drop is placed. Θa ? Θr is called contact angle hysteresis. Contact angle hysteresis is essential for our daily life because it provides friction to drops. Many applications, such as coating, painting, flotation, would not be possible without contact angle hysteresis. Contact angle hysteresis is caused by the nanoscopic structure of the surfaces. Here, we review our current understanding of contact angle hysteresis with a focus on water as the liquid. We describe appropriate methods to measure it, discuss the causes of contact angle hysteresis, and describe the preparation of surfaces with low contact angle hysteresis. |
| |
| Keywords: | Wetting Water Friction Contact angle Drop Hysteresis Surface characterization |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
