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Bouncing behaviors of suspension liquid drops on a superhydrophobic surface

Research paper by Y. Ueda, S. Yokoyama, M. Nomura, R. Tsujino, M. Iguchi

Indexed on: 03 Aug '10Published on: 03 Aug '10Published in: Journal of Visualization



Abstract

This paper reveals three patterns of bouncing behaviors of suspension drops containing calcium carbonate (CaCO3) powder on a superhydrophobic surface with the aid of a high-speed camera. In transmission electron microscopy (TEM) observation, the particles of CaCO3 are shaped like sticks whose equivalent diameters are about 700 nm. Unlike a pure water drop, dense suspension drops cannot be pinched off at the bounce on the superhydrophobic surface due to a high effective viscosity, whereas the equilibrium contact angle appears to be almost identical in all kinds of droplets.

Graphical abstract 10.1007/s12650-010-0051-0.jpg