Slip flow of diverse liquids on robust superomniphobic surfaces

Yang Wu; Meirong Cai; Zhenquan Li; Xinwang Song; Hongyan Wang; Xiaowei Pei; Feng Zhou

doi:10.1016/j.jcis.2013.09.041

Slip flow of diverse liquids on robust superomniphobic surfaces

J Colloid Interface Sci. 2014 Jan 15:414:9-13. doi: 10.1016/j.jcis.2013.09.041. Epub 2013 Oct 5.

Authors

Yang Wu¹, Meirong Cai, Zhenquan Li, Xinwang Song, Hongyan Wang, Xiaowei Pei, Feng Zhou

Affiliation

¹ State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China; University of Chinese Academy of Science, Beijing 100039, China.

PMID: 24231078
DOI: 10.1016/j.jcis.2013.09.041

Abstract

Water slips exist over superhydrophobic solid surfaces, but the slip flow of diverse liquids on a single surface has not been deliberately studied to date. Here, we report the slip flow behavior of a variety of liquids with different surface tensions and viscosities on a robust omniphobic surface. This surface displayed a dramatic slippage effect and thus a high drag reduction efficiency of approximately 10-20% for all liquids, depending on both liquid viscosity and surface energy. The observed liquid slip was attributed to the surface dual micro/nanostructure and the low-surface-energy coating.

Keywords: Drag reduction; Liquids; Slip length; Superomniphobic surface.