A Unified Approach to Disjoining Pressure in Liquid and Vapor Interlayer within the Framework of the Density Functional Theory

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A Unified Approach to Disjoining Pressure in Liquid and Vapor Interlayer within the Framework of the Density Functional Theory. / Shchekin, A. K.; Gosteva, L. A.; Lebedeva, T. S.; Tat’yanenko, D. V.

In: Colloid Journal, Vol. 83, No. 2, 01.03.2021, p. 263-269.

Research output: Contribution to journal › Article › peer-review

BibTeX

@article{65d9b64556e94af6b56c0c048ffce36c,

title = "A Unified Approach to Disjoining Pressure in Liquid and Vapor Interlayer within the Framework of the Density Functional Theory",

abstract = "Abstract: The classical density functional theory makes it possible to explicitly calculate the local density profiles, the components of the pressure tensor, and the thicknesses of thin interlayers between a lyophilic or lyophobic solid surface and, accordingly, gas or liquid phases at different values of the chemical potentials of the phases. Within the framework of a unified approach based on the gradient approximation of the classical density functional theory, it has been shown that, at certain values of parameters characterizing the wettability or nonwettability of a solid, equilibrium liquid films or vapor layers of a uniform thickness are formed around a spherical particle, if its surface is lyophilic or lyophobic, respectively. Mechanical and thermodynamic definitions have been given for the disjoining pressure in the spherical liquid or vapor interlayer around a solid particle, and the agreement between the definitions has been proven by calculations at different interlayer thicknesses and particle radii. It has been shown that the disjoining pressure in a vapor interlayer around a nanosized lyophobic particle decreases with an increase in particle radius, with this phenomenon being opposite to the situation with liquid films.",

keywords = "HETEROGENEOUS NUCLEATION, MECHANICAL EQUILIBRIUM, SURFACE FORCES, THERMODYNAMICS, EQUATION",

author = "Shchekin, {A. K.} and Gosteva, {L. A.} and Lebedeva, {T. S.} and Tat{\textquoteright}yanenko, {D. V.}",

year = "2021",

month = mar,

day = "1",

doi = "10.1134/S1061933X21010129",

language = "English",

volume = "83",

pages = "263--269",

journal = "Colloid Journal",

issn = "1061-933X",

publisher = "Pleiades Publishing",

number = "2",

}

RIS

TY - JOUR

T1 - A Unified Approach to Disjoining Pressure in Liquid and Vapor Interlayer within the Framework of the Density Functional Theory

AU - Shchekin, A. K.

AU - Gosteva, L. A.

AU - Lebedeva, T. S.

AU - Tat’yanenko, D. V.

PY - 2021/3/1

Y1 - 2021/3/1

N2 - Abstract: The classical density functional theory makes it possible to explicitly calculate the local density profiles, the components of the pressure tensor, and the thicknesses of thin interlayers between a lyophilic or lyophobic solid surface and, accordingly, gas or liquid phases at different values of the chemical potentials of the phases. Within the framework of a unified approach based on the gradient approximation of the classical density functional theory, it has been shown that, at certain values of parameters characterizing the wettability or nonwettability of a solid, equilibrium liquid films or vapor layers of a uniform thickness are formed around a spherical particle, if its surface is lyophilic or lyophobic, respectively. Mechanical and thermodynamic definitions have been given for the disjoining pressure in the spherical liquid or vapor interlayer around a solid particle, and the agreement between the definitions has been proven by calculations at different interlayer thicknesses and particle radii. It has been shown that the disjoining pressure in a vapor interlayer around a nanosized lyophobic particle decreases with an increase in particle radius, with this phenomenon being opposite to the situation with liquid films.

AB - Abstract: The classical density functional theory makes it possible to explicitly calculate the local density profiles, the components of the pressure tensor, and the thicknesses of thin interlayers between a lyophilic or lyophobic solid surface and, accordingly, gas or liquid phases at different values of the chemical potentials of the phases. Within the framework of a unified approach based on the gradient approximation of the classical density functional theory, it has been shown that, at certain values of parameters characterizing the wettability or nonwettability of a solid, equilibrium liquid films or vapor layers of a uniform thickness are formed around a spherical particle, if its surface is lyophilic or lyophobic, respectively. Mechanical and thermodynamic definitions have been given for the disjoining pressure in the spherical liquid or vapor interlayer around a solid particle, and the agreement between the definitions has been proven by calculations at different interlayer thicknesses and particle radii. It has been shown that the disjoining pressure in a vapor interlayer around a nanosized lyophobic particle decreases with an increase in particle radius, with this phenomenon being opposite to the situation with liquid films.

KW - HETEROGENEOUS NUCLEATION

KW - MECHANICAL EQUILIBRIUM

KW - SURFACE FORCES

KW - THERMODYNAMICS

KW - EQUATION

UR - http://www.scopus.com/inward/record.url?scp=85104530015&partnerID=8YFLogxK

UR - https://www.mendeley.com/catalogue/63620bee-65ff-358c-a450-a3331f2060c7/

U2 - 10.1134/S1061933X21010129

DO - 10.1134/S1061933X21010129

M3 - Article

AN - SCOPUS:85104530015

VL - 83

SP - 263

EP - 269

JO - Colloid Journal

JF - Colloid Journal

SN - 1061-933X

IS - 2

ER -

ID: 76915038