Surface properties of the ethanol/water mixture: Thickness and composition
Ethanol is a common amphiphilic solvent often used in conjunction with water. However, despite its widespread use, key questions regarding the thickness and composition of molecules at the ethanol/water/air surface remain unclear. Recent thermodynamic analyses, Bagheri and co-authors (2016) and Sant...
| Main Authors: | , , , , , |
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| Format: | Journal Article |
| Language: | English |
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ELSEVIER
2019
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| Online Access: | http://hdl.handle.net/20.500.11937/79506 |
| _version_ | 1848764063798001664 |
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| author | Hyde, Anita Ohshio, M. Nguyen, C.V. Yusa, S.I. Yamada, N.L. Phan, Chi |
| author_facet | Hyde, Anita Ohshio, M. Nguyen, C.V. Yusa, S.I. Yamada, N.L. Phan, Chi |
| author_sort | Hyde, Anita |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | Ethanol is a common amphiphilic solvent often used in conjunction with water. However, despite its widespread use, key questions regarding the thickness and composition of molecules at the ethanol/water/air surface remain unclear. Recent thermodynamic analyses, Bagheri and co-authors (2016) and Santos and Reis (2018), indicated that the interfacial thickness is not constant. However, the interfacial thickness from these two analyses follows opposite trends. This study aims to provide a detailed description of the thickness and composition of the interfacial layer by combining neutron reflectivity (NR) experiments with rigorous molecular simulation. The interfacial composition was determined from molecular simulations and, in conjunction with the Gibbs excess concentration, used to calculate the interfacial thickness. It was found that the thickness decreased exponentially and reached a plateau of ~ 8.2 Å. The results confirm the trends obtained thermodynamically from surface tension. The study also provides a new theoretical framework to describe the interfacial layer of water/alcohol mixtures. |
| first_indexed | 2025-11-14T11:13:24Z |
| format | Journal Article |
| id | curtin-20.500.11937-79506 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-14T11:13:24Z |
| publishDate | 2019 |
| publisher | ELSEVIER |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-795062021-06-16T06:48:59Z Surface properties of the ethanol/water mixture: Thickness and composition Hyde, Anita Ohshio, M. Nguyen, C.V. Yusa, S.I. Yamada, N.L. Phan, Chi Science & Technology Physical Sciences Chemistry, Physical Physics, Atomic, Molecular & Chemical Chemistry Physics Ethanol/water mixture Surface adsorption Neutron reflectivity MOLECULAR ARRANGEMENT WATER ALCOHOL ADSORPTION METHANOL TENSION Ethanol is a common amphiphilic solvent often used in conjunction with water. However, despite its widespread use, key questions regarding the thickness and composition of molecules at the ethanol/water/air surface remain unclear. Recent thermodynamic analyses, Bagheri and co-authors (2016) and Santos and Reis (2018), indicated that the interfacial thickness is not constant. However, the interfacial thickness from these two analyses follows opposite trends. This study aims to provide a detailed description of the thickness and composition of the interfacial layer by combining neutron reflectivity (NR) experiments with rigorous molecular simulation. The interfacial composition was determined from molecular simulations and, in conjunction with the Gibbs excess concentration, used to calculate the interfacial thickness. It was found that the thickness decreased exponentially and reached a plateau of ~ 8.2 Å. The results confirm the trends obtained thermodynamically from surface tension. The study also provides a new theoretical framework to describe the interfacial layer of water/alcohol mixtures. 2019 Journal Article http://hdl.handle.net/20.500.11937/79506 10.1016/j.molliq.2019.111005 English http://creativecommons.org/licenses/by-nc-nd/4.0/ ELSEVIER fulltext |
| spellingShingle | Science & Technology Physical Sciences Chemistry, Physical Physics, Atomic, Molecular & Chemical Chemistry Physics Ethanol/water mixture Surface adsorption Neutron reflectivity MOLECULAR ARRANGEMENT WATER ALCOHOL ADSORPTION METHANOL TENSION Hyde, Anita Ohshio, M. Nguyen, C.V. Yusa, S.I. Yamada, N.L. Phan, Chi Surface properties of the ethanol/water mixture: Thickness and composition |
| title | Surface properties of the ethanol/water mixture: Thickness and composition |
| title_full | Surface properties of the ethanol/water mixture: Thickness and composition |
| title_fullStr | Surface properties of the ethanol/water mixture: Thickness and composition |
| title_full_unstemmed | Surface properties of the ethanol/water mixture: Thickness and composition |
| title_short | Surface properties of the ethanol/water mixture: Thickness and composition |
| title_sort | surface properties of the ethanol/water mixture: thickness and composition |
| topic | Science & Technology Physical Sciences Chemistry, Physical Physics, Atomic, Molecular & Chemical Chemistry Physics Ethanol/water mixture Surface adsorption Neutron reflectivity MOLECULAR ARRANGEMENT WATER ALCOHOL ADSORPTION METHANOL TENSION |
| url | http://hdl.handle.net/20.500.11937/79506 |