Influence of Small Quantities of Water on the Physical Properties of Alkylammonium Nitrate Ionic Liquids
This paper presents a comprehensive study of two alkylammonium nitrate ionic liquids. As part of this family of materials, mainly ethylammonium nitrate (EAN) and also propylammonium nitrate (PAN) have attracted a great deal of attention during the last decades due to their potential applications in...
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MDPI AG
2021-07-01
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| Series: | International Journal of Molecular Sciences |
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| Online Access: | https://www.mdpi.com/1422-0067/22/14/7334 |
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| author | David Ausín Juan J. Parajó José L. Trenzado Luis M. Varela Oscar Cabeza Luisa Segade |
| author_facet | David Ausín Juan J. Parajó José L. Trenzado Luis M. Varela Oscar Cabeza Luisa Segade |
| author_sort | David Ausín |
| collection | DOAJ |
| description | This paper presents a comprehensive study of two alkylammonium nitrate ionic liquids. As part of this family of materials, mainly ethylammonium nitrate (EAN) and also propylammonium nitrate (PAN) have attracted a great deal of attention during the last decades due to their potential applications in many fields. Although there have been numerous publications focused on the measurement of their physical properties, a great dispersion can be observed in the results obtained for the same magnitude. One of the critical points to be taken into account in their physical characterization is their water content. Thus, the main objective of this work was to determine the degree of influence of the presence of small quantities of water in EAN and PAN on the measurement of density, viscosity, electrical conductivity, refractive index and surface tension. For this purpose, the first three properties were determined in samples of EAN and PAN with water contents below 30,000 ppm in a wide range of temperatures, between 5 and 95 °C, while the last two were obtained at 25 °C. As a result of this study, it has been concluded that the presence of water is critical in those physical properties that involve mass or charge transport processes, resulting in the finding that the absolute value of the average percentage change in both viscosity and electrical conductivity is above 40%. Meanwhile, refractive index (≤0.3%), density (≤0.5%) and surface tension (≤2%) present much less significant changes. |
| first_indexed | 2024-03-10T09:37:45Z |
| format | Article |
| id | doaj.art-e67ea221bd574c3da19071f2c7c4ae5b |
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| issn | 1661-6596 1422-0067 |
| language | English |
| last_indexed | 2024-03-10T09:37:45Z |
| publishDate | 2021-07-01 |
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| record_format | Article |
| series | International Journal of Molecular Sciences |
| spelling | doaj.art-e67ea221bd574c3da19071f2c7c4ae5b2023-11-22T03:56:55ZengMDPI AGInternational Journal of Molecular Sciences1661-65961422-00672021-07-012214733410.3390/ijms22147334Influence of Small Quantities of Water on the Physical Properties of Alkylammonium Nitrate Ionic LiquidsDavid Ausín0Juan J. Parajó1José L. Trenzado2Luis M. Varela3Oscar Cabeza4Luisa Segade5Departamento de Física, Facultade de Ciencias, Campus da Zapateira, Universidade da Coruña, 15071 A Coruña, SpainGrupo de Nanomateriais, Fotónica e Materia Branda, Departamento de Física de Partículas y Departamento de Física Aplicada, Universidade de Santiago de Compostela, Campus Vida s/n, 15782 Santiago de Compostela, SpainDepartamento de Física, Universidad de Las Palmas de Gran Canaria, 35017 Las Palmas Gran Canaria, SpainGrupo de Nanomateriais, Fotónica e Materia Branda, Departamento de Física de Partículas y Departamento de Física Aplicada, Universidade de Santiago de Compostela, Campus Vida s/n, 15782 Santiago de Compostela, SpainDepartamento de Física, Facultade de Ciencias, Campus da Zapateira, Universidade da Coruña, 15071 A Coruña, SpainDepartamento de Física, Facultade de Ciencias, Campus da Zapateira, Universidade da Coruña, 15071 A Coruña, SpainThis paper presents a comprehensive study of two alkylammonium nitrate ionic liquids. As part of this family of materials, mainly ethylammonium nitrate (EAN) and also propylammonium nitrate (PAN) have attracted a great deal of attention during the last decades due to their potential applications in many fields. Although there have been numerous publications focused on the measurement of their physical properties, a great dispersion can be observed in the results obtained for the same magnitude. One of the critical points to be taken into account in their physical characterization is their water content. Thus, the main objective of this work was to determine the degree of influence of the presence of small quantities of water in EAN and PAN on the measurement of density, viscosity, electrical conductivity, refractive index and surface tension. For this purpose, the first three properties were determined in samples of EAN and PAN with water contents below 30,000 ppm in a wide range of temperatures, between 5 and 95 °C, while the last two were obtained at 25 °C. As a result of this study, it has been concluded that the presence of water is critical in those physical properties that involve mass or charge transport processes, resulting in the finding that the absolute value of the average percentage change in both viscosity and electrical conductivity is above 40%. Meanwhile, refractive index (≤0.3%), density (≤0.5%) and surface tension (≤2%) present much less significant changes.https://www.mdpi.com/1422-0067/22/14/7334ionic liquidethylammonium nitratepropylammonium nitratewater-freedensityviscosity |
| spellingShingle | David Ausín Juan J. Parajó José L. Trenzado Luis M. Varela Oscar Cabeza Luisa Segade Influence of Small Quantities of Water on the Physical Properties of Alkylammonium Nitrate Ionic Liquids International Journal of Molecular Sciences ionic liquid ethylammonium nitrate propylammonium nitrate water-free density viscosity |
| title | Influence of Small Quantities of Water on the Physical Properties of Alkylammonium Nitrate Ionic Liquids |
| title_full | Influence of Small Quantities of Water on the Physical Properties of Alkylammonium Nitrate Ionic Liquids |
| title_fullStr | Influence of Small Quantities of Water on the Physical Properties of Alkylammonium Nitrate Ionic Liquids |
| title_full_unstemmed | Influence of Small Quantities of Water on the Physical Properties of Alkylammonium Nitrate Ionic Liquids |
| title_short | Influence of Small Quantities of Water on the Physical Properties of Alkylammonium Nitrate Ionic Liquids |
| title_sort | influence of small quantities of water on the physical properties of alkylammonium nitrate ionic liquids |
| topic | ionic liquid ethylammonium nitrate propylammonium nitrate water-free density viscosity |
| url | https://www.mdpi.com/1422-0067/22/14/7334 |
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