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Wetting Behavior of a Three-Phase System in Contact with a Surface
[Image: see text] We extend the Cahn-Landau-de Gennes mean field theory of wetting in binary mixtures to understand the wetting thermodynamics of a three phase system (e.g., polymer dispersed liquid crystals or polymer-colloid mixtures) that is in contact with an external surface, which prefers one...
Autores principales: | , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
American Chemical Society
2022
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Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9134494/ https://www.ncbi.nlm.nih.gov/pubmed/35634035 http://dx.doi.org/10.1021/acs.macromol.1c02559 |
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author | Mukherjee, Biswaroop Chakrabarti, Buddhapriya |
author_facet | Mukherjee, Biswaroop Chakrabarti, Buddhapriya |
author_sort | Mukherjee, Biswaroop |
collection | PubMed |
description | [Image: see text] We extend the Cahn-Landau-de Gennes mean field theory of wetting in binary mixtures to understand the wetting thermodynamics of a three phase system (e.g., polymer dispersed liquid crystals or polymer-colloid mixtures) that is in contact with an external surface, which prefers one of the phases. Using a model free-energy, which has three minima in its landscape, we show that as the central minimum becomes more stable compared to the remaining ones, the bulk phase diagram encounters a triple point and then bifurcates and we observe a novel non-monotonic dependence of the surface tension as a function of the stability of the central minimum. We show that this non-monotonicity in surface tension is associated with a complete to partial wetting transition. We obtain the complete wetting phase behavior as a function of phase stability and the surface interaction parameters when the system is close to the bulk triple point. The model free-energy that we use is qualitatively similar to that of a renormalized free energy, which arises in the context of polymer-liquid crystal mixtures. Finally, we study the thermodynamics of wetting for an explicit polymer-liquid crystal mixture and show that its thermodynamics is similar to that of our model free-energy. |
format | Online Article Text |
id | pubmed-9134494 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | American Chemical Society |
record_format | MEDLINE/PubMed |
spelling | pubmed-91344942022-05-27 Wetting Behavior of a Three-Phase System in Contact with a Surface Mukherjee, Biswaroop Chakrabarti, Buddhapriya Macromolecules [Image: see text] We extend the Cahn-Landau-de Gennes mean field theory of wetting in binary mixtures to understand the wetting thermodynamics of a three phase system (e.g., polymer dispersed liquid crystals or polymer-colloid mixtures) that is in contact with an external surface, which prefers one of the phases. Using a model free-energy, which has three minima in its landscape, we show that as the central minimum becomes more stable compared to the remaining ones, the bulk phase diagram encounters a triple point and then bifurcates and we observe a novel non-monotonic dependence of the surface tension as a function of the stability of the central minimum. We show that this non-monotonicity in surface tension is associated with a complete to partial wetting transition. We obtain the complete wetting phase behavior as a function of phase stability and the surface interaction parameters when the system is close to the bulk triple point. The model free-energy that we use is qualitatively similar to that of a renormalized free energy, which arises in the context of polymer-liquid crystal mixtures. Finally, we study the thermodynamics of wetting for an explicit polymer-liquid crystal mixture and show that its thermodynamics is similar to that of our model free-energy. American Chemical Society 2022-05-12 2022-05-24 /pmc/articles/PMC9134494/ /pubmed/35634035 http://dx.doi.org/10.1021/acs.macromol.1c02559 Text en © 2022 The Authors. Published by American Chemical Society https://creativecommons.org/licenses/by/4.0/Permits the broadest form of re-use including for commercial purposes, provided that author attribution and integrity are maintained (https://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Mukherjee, Biswaroop Chakrabarti, Buddhapriya Wetting Behavior of a Three-Phase System in Contact with a Surface |
title | Wetting Behavior of a Three-Phase System in Contact
with a Surface |
title_full | Wetting Behavior of a Three-Phase System in Contact
with a Surface |
title_fullStr | Wetting Behavior of a Three-Phase System in Contact
with a Surface |
title_full_unstemmed | Wetting Behavior of a Three-Phase System in Contact
with a Surface |
title_short | Wetting Behavior of a Three-Phase System in Contact
with a Surface |
title_sort | wetting behavior of a three-phase system in contact
with a surface |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9134494/ https://www.ncbi.nlm.nih.gov/pubmed/35634035 http://dx.doi.org/10.1021/acs.macromol.1c02559 |
work_keys_str_mv | AT mukherjeebiswaroop wettingbehaviorofathreephasesystemincontactwithasurface AT chakrabartibuddhapriya wettingbehaviorofathreephasesystemincontactwithasurface |