V
Volodymyr I. Kovalchuk
Researcher at National Academy of Sciences of Ukraine
Publications - 105
Citations - 2265
Volodymyr I. Kovalchuk is an academic researcher from National Academy of Sciences of Ukraine. The author has contributed to research in topics: Adsorption & Drop (liquid). The author has an hindex of 24, co-authored 99 publications receiving 1967 citations. Previous affiliations of Volodymyr I. Kovalchuk include Max Planck Society.
Papers
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Journal ArticleDOI
Interfacial dilational rheology by oscillating bubble/drop methods
TL;DR: In this article, the authors focus on oscillating drop/bubble methodologies where harmonic variations of the interfacial area are utilized for the measurement of the dilational viscoelasticity in the frequency domain.
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Thermodynamics, adsorption kinetics and rheology of mixed protein-surfactant interfacial layers.
Cs. Kotsmar,Vincent Pradines,V.S. Alahverdjieva,Eugene V. Aksenenko,Valentin B. Fainerman,Volodymyr I. Kovalchuk,Jürgen Krägel,Martin E. Leser,Boris A. Noskov,Reinhard Miller +9 more
TL;DR: Based on experimental studies with milk proteins mixed with non-ionic and ionic surfactants at the water/air and water/hexane interfaces, the potential of the theoretical tools is demonstrated and it is shown that the formation of mixed adsorption layer is based on a modification of the protein molecules via electrostatic (ionic) and/or hydrophobic interactions by the surfactant molecules and a competitive Adsorption of the resulting complexes with the free, unbound surfactan.
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Models of two-dimensional solution assuming the internal compressibility of adsorbed molecules: A comparative analysis
Valentin B. Fainerman,Volodymyr I. Kovalchuk,Eugene V. Aksenenko,Martin Michel,Martin E. Leser,Reinhard Miller +5 more
TL;DR: In this paper, Fainerman et al. discussed the relationship between surface dilational rheology data and the corresponding limiting dilational elasticity, showing that the experimental elasticities in the high-frequency limit show an increase with concentration followed by a plateau or flat maximum.
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Surface dilational rheology of mixed adsorption layers at liquid interfaces
TL;DR: Models by Jiang et al., Joos, and by Lucassen and van den Tempel are compared here and applied to experimental data and represent a very good scientific background for studies of the mechanical behaviour of mixed adsorption layers.
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Surface-pressure isotherms of monolayers formed by microsize and nanosize particles.
Valentin B. Fainerman,Volodymyr I. Kovalchuk,E. V. Lucassen-Reynders,D. O. Grigoriev,James K. Ferri,M. E. Leser,M. Michel,Reinhard Miller,Helmut Möhwald +8 more
TL;DR: In this paper, the surface pressure isotherms of particle monolayers for a wide range of particles sizes (between 75 μm and 7.5 nm) are described by the theoretical model with one modification.