Evolution analysis of thin impregnated layers for "smooth impregnation coating" in contact with aqueous medium (SLIPS) in the surface force laboratory of the Institute of Physical Chemistry and Electrochemistry, Russian Federation, , A.N. Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Federation. Analysis of the surface forces acting in this thin layer shows that in many cases it loses thermodynamic stability and collapses. The durability of the "smooth impregnated coating" and its functional properties, including anti-ice, waterproof and corrosion resistance, depends on the evolution of the lubricating layer structure. As long as the film maintains its integrity, the surface remains smooth and retains its properties. Mechanical stress causes lubricant to be exhausted. For example, when disengaged from the surface of ice, snow or frost, some of the lubricant is taken away.
Scientists have shown that on textured aluminum hydroxide substrates, when in contact with water, the redistribution and thickness of the lubricant will decrease without destroying the film. A stable thin wet film is formed on the top and walls of the ridge. excess lubricant is extruded to the concave meniscus between the ridges.
"The thickness of the protective film greatly affects the lubricity and functional properties of the 'smooth impregnated coating'. Therefore, it is crucial to understand the thermodynamic stability of thin and thick lubricants on smooth and porous surfaces, - Senior researcher and chemistry candidate at the Surface Force Laboratory, Institute of Physical and Chemistry, Russian Academy of Sciences Science.
– In this study, we analyzed the stability of the film based on the contribution of van der Waals force to separation pressure. The results will make it possible to select the surface structure and composition of the lubricant so that the thin impregnation layer remains more stable when in contact with liquid and gas media. "
Aviation, shipbuilding, energy and other fields require stable coatings with waterproof, ice-proof and corrosion-resistant properties, where precipitation crystals on the surface of mobile devices can cause it to be damaged, damaged, and even accidents.
"Creating flight safety technology for aviation is one of the key areas of many science schools," continued Kirill Emelianenko. "Our labs have been working on this topic for a long time. Thanks to new research, we now have a deeper understanding of how the anti-icing properties of "slippery impregnated coatings" come and go, and we are better prepared for their effective technology applications." This work is supported by the Russian Science Foundation. The results of the study were published in the Journal of Colloids and Interface Science.
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