Ordered and Disordered Carboxylic Acid Monolayers on Calcite (104) and Muscovite (001) Surfaces

[Image: see text] The adsorption of carboxylic acid molecules at the calcite (104) and the muscovite (001) surface was investigated using surface X-ray diffraction. All four investigated carboxylic acid molecules, hexanoic acid, octanoic acid, lauric acid, and stearic acid, were found to adsorb at t...

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Autores principales: Brugman, Sander J. T., Accordini, Paolo, Megens, Frank, Devogelaer, Jan-Joris, Vlieg, Elias
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Chemical Society 2022
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9150091/
https://www.ncbi.nlm.nih.gov/pubmed/35655936
http://dx.doi.org/10.1021/acs.jpcc.2c01157
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author Brugman, Sander J. T.
Accordini, Paolo
Megens, Frank
Devogelaer, Jan-Joris
Vlieg, Elias
author_facet Brugman, Sander J. T.
Accordini, Paolo
Megens, Frank
Devogelaer, Jan-Joris
Vlieg, Elias
author_sort Brugman, Sander J. T.
collection PubMed
description [Image: see text] The adsorption of carboxylic acid molecules at the calcite (104) and the muscovite (001) surface was investigated using surface X-ray diffraction. All four investigated carboxylic acid molecules, hexanoic acid, octanoic acid, lauric acid, and stearic acid, were found to adsorb at the calcite surface. Whereas the shortest two carboxylic acid molecules, hexanoic acid and octanoic acid, showed limited ordering and a flexible, disordered chain, the two longest carboxylic acid molecules form fully ordered monolayers, i.e., these form highly structured self-assembled monolayers. The latter molecules are oriented almost fully upright, with a tilt of up to 10°. The oxygen atoms of the organic molecules are found at similar positions to those of water molecules at the calcite–water interface. This suggests that in both cases, the oxygen atoms compensate for the broken bonds at the calcite surface. Under the same experimental conditions, stearic acid does not adsorb to K(+) and Ca(2+)-functionalized muscovite mica because the neutral molecules do not engage in the ionic bonds typical for the mica interface. These differences in adsorption behavior are characteristic for the differences of the oil–solid interactions in carbonate and sandstone reservoirs.
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spelling pubmed-91500912022-05-31 Ordered and Disordered Carboxylic Acid Monolayers on Calcite (104) and Muscovite (001) Surfaces Brugman, Sander J. T. Accordini, Paolo Megens, Frank Devogelaer, Jan-Joris Vlieg, Elias J Phys Chem C Nanomater Interfaces [Image: see text] The adsorption of carboxylic acid molecules at the calcite (104) and the muscovite (001) surface was investigated using surface X-ray diffraction. All four investigated carboxylic acid molecules, hexanoic acid, octanoic acid, lauric acid, and stearic acid, were found to adsorb at the calcite surface. Whereas the shortest two carboxylic acid molecules, hexanoic acid and octanoic acid, showed limited ordering and a flexible, disordered chain, the two longest carboxylic acid molecules form fully ordered monolayers, i.e., these form highly structured self-assembled monolayers. The latter molecules are oriented almost fully upright, with a tilt of up to 10°. The oxygen atoms of the organic molecules are found at similar positions to those of water molecules at the calcite–water interface. This suggests that in both cases, the oxygen atoms compensate for the broken bonds at the calcite surface. Under the same experimental conditions, stearic acid does not adsorb to K(+) and Ca(2+)-functionalized muscovite mica because the neutral molecules do not engage in the ionic bonds typical for the mica interface. These differences in adsorption behavior are characteristic for the differences of the oil–solid interactions in carbonate and sandstone reservoirs. American Chemical Society 2022-05-18 2022-05-26 /pmc/articles/PMC9150091/ /pubmed/35655936 http://dx.doi.org/10.1021/acs.jpcc.2c01157 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 Brugman, Sander J. T.
Accordini, Paolo
Megens, Frank
Devogelaer, Jan-Joris
Vlieg, Elias
Ordered and Disordered Carboxylic Acid Monolayers on Calcite (104) and Muscovite (001) Surfaces
title Ordered and Disordered Carboxylic Acid Monolayers on Calcite (104) and Muscovite (001) Surfaces
title_full Ordered and Disordered Carboxylic Acid Monolayers on Calcite (104) and Muscovite (001) Surfaces
title_fullStr Ordered and Disordered Carboxylic Acid Monolayers on Calcite (104) and Muscovite (001) Surfaces
title_full_unstemmed Ordered and Disordered Carboxylic Acid Monolayers on Calcite (104) and Muscovite (001) Surfaces
title_short Ordered and Disordered Carboxylic Acid Monolayers on Calcite (104) and Muscovite (001) Surfaces
title_sort ordered and disordered carboxylic acid monolayers on calcite (104) and muscovite (001) surfaces
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9150091/
https://www.ncbi.nlm.nih.gov/pubmed/35655936
http://dx.doi.org/10.1021/acs.jpcc.2c01157
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