A Study of Influence of Surface Nanosized Gaseous Structures on the Water Freezing Rate and Wettability of Metallic and Oxide Substrates
Author:
Karacharov Anton A.1,
Likhatski Maxim N.2
Affiliation:
1. Institute of Chemistry and Chemical Technology SB RAS FRC “Krasnoyarsk Scientific Center SB RAS”
2. Institute of Chemistry and Chemical Technology SB RAS FRC “Krasnoyarsk Science Center SB RAS”
Abstract
In a series of experiments using thermal gradient “cool water-warm substrate”, an increase of number and sizes of surface gaseous nanostructures during an increase of the temperature difference was found to give rise to a decrease of surface hydrophobicity. It was established that the higher the surface inhomogeneity, the shorter the time of water freezing. In case of HOPG, an extremely long lifetime of overcooled to -20 °С water of ~100 min was observed when surface gas nanostructures persisted. This can be understood in terms of a “gas screening” of surface inhomogeneity which could potentially act as ice nucleation centers
Publisher
Siberian Federal University
Subject
General Chemical Engineering,General Chemistry