Correlation effects during liquid infiltration into hydrophobic nanoporous media

To explain the thermal effects observed during the infiltration of a nonwetting liquid into a disordered nanoporous medium, we have constructed a model that includes correlation effects in a disordered medium. It is based on analytical methods of the percolation theory. The infiltration of a porous...

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Bibliographic Details
Published in:Journal of experimental and theoretical physics 2011-03, Vol.112 (3), p.385-400, Article 385
Main Authors: Borman, V. D., Belogorlov, A. A., Byrkin, V. A., Lisichkin, G. V., Tronin, V. N., Troyan, V. I.
Format: Article
Language:English
Subjects:
ABSORPTION
Analysis
Classical and Quantum Gravitation
CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
CORRELATIONS
Elementary Particles
FLUCTUATIONS
HYSTERESIS
LIQUIDS
NANOSCIENCE AND NANOTECHNOLOGY
NANOSTRUCTURES
Particle and Nuclear Physics
Physics
Physics and Astronomy
POROSITY
POROUS MATERIALS
PROBABILITY
Quantum Field Theory
Relativity Theory
Solid State Physics
Solids and Liquids
TEMPERATURE DEPENDENCE
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Summary:To explain the thermal effects observed during the infiltration of a nonwetting liquid into a disordered nanoporous medium, we have constructed a model that includes correlation effects in a disordered medium. It is based on analytical methods of the percolation theory. The infiltration of a porous medium is considered as the infiltration of pores in an infinite cluster of interconnected pores. Using the model of randomly situated spheres (RSS), we have been able to take into account the correlation effect of the spatial arrangement and connectivity of pores in the medium. The other correlation effect of the mutual arrangement of filled and empty pores on the shell of an infinite percolation cluster of filled pores determines the infiltration fluctuation probability. This probability has been calculated analytically. Allowance for these correlation effects during infiltration and defiltration makes it possible to suggest a physical mechanism of the contact angle hysteresis and to calculate the dependences of the contact angles on the degree of infiltration, porosity of the medium, and temperature. Based on the suggested model, we have managed to describe the temperature dependences of the infiltration and defiltration pressures and the thermal effects that accompany the absorption of energy by disordered porous medium-nonwetting liquid systems with various porosities in a unified way.
ISSN:1063-7761
1090-6509
DOI:10.1134/S1063776111010055