科研之友
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摘要
The use of a method of studying wetting both for the research of fundamental problems of surface physicochemistry, such as obtaining information on the structure and properties of the interface and the processes that occur with its participation, and for technological applications related to the preparation of new materials and coatings is analyzed. The fundamental relationships between the contact angle and the thermodynamic and geometric characteristics of the surface are discussed; the factors that have an effect on the contact angle value on nanocomposite surfaces are analyzed. It is shown that recent advances in digital processing of video images provide a qualitatively new level of measurement of contact angles and make the analysis of surface wetting one of the most efficient experimental methods for studying the processes that occur at interfaces. In some cases, the accumulated basic knowledge about the relationship between the measured contact angle and the properties of the surface under study makes it possible to rapidly and reliably obtain detailed information about the roughness, chemical composition, and topology of the surface without using expensive equipment; in other cases, it provides additional information that makes it possible to reveal the mechanisms of the surface phenomena under study. As a case in point, we describe the use of techniques of analysis of wetting for determining the surface porosity and surface topology, for estimating the pattern of interaction between polymer materials and aqueous media, and for revealing the efficiency of anticorrosion coatings on metal surfaces.
- 出版日期2011-12
