Drop-wise and film-wise water condensation processes occurring on metallic micro-scaled surfaces

作者：Starostin Anton; Valtsifer Viktor; Barkay Zahava; Legchenkova Irina; Danchuk Viktor; Bormashenko Edward^*

来源：Applied Surface Science, 2018, 444: 604-609.

DOI：10.1016/j.apsusc.2018.03.065

• Superoleophobic surfaces
• Superhydrophobic surfaces
• Drop-wise condensation
• Film-wise condensation
• Stability of the Cassie state
• Kinetics of droplets growth

Water condensation was studied on silanized (superhydrophobic) and fluorinated (superoleophobic) micro-rough aluminum surfaces of the same topography. Condensation on superhydrophobic surfaces occurred via film-wise mechanism, whereas on superoleophobic surfaces it was drop-wise. The difference in the pathways of condensation was attributed to the various energy barriers separating the Cassie and Wenzel wetting states on the investigated surfaces. The higher barriers inherent for superoleophobic surfaces promoted the drop-wise condensation. Triple-stage kinetics of growth of droplets condensed on superoleophobic surfaces is reported and discussed.

• 出版日期2018-6-30