Capillary rise kinetics of 1-butyl-3-methyl-imidazolium tetrafluoroborate (BMI.BF4) in a single glass tube: Experiment and modeling
Ionic liquids are materials composed purely of cations and anions which melt at or below 100 ∘C. For applications involving wetting of a solid surface by an ionic liquid or the flow of ionic liquid through capillaries, one must know the wetting properties of the ionic liquid/solid pair, such as the...
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| Format: | Article |
| Language: | English |
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Elsevier
2023-06-01
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| Series: | Journal of Ionic Liquids |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2772422023000010 |
| _version_ | 1797801679344631808 |
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| author | Nicholas Chies de Souza Castro Gustavo Tognon Alexandre Hahn Englert |
| author_facet | Nicholas Chies de Souza Castro Gustavo Tognon Alexandre Hahn Englert |
| author_sort | Nicholas Chies de Souza Castro |
| collection | DOAJ |
| description | Ionic liquids are materials composed purely of cations and anions which melt at or below 100 ∘C. For applications involving wetting of a solid surface by an ionic liquid or the flow of ionic liquid through capillaries, one must know the wetting properties of the ionic liquid/solid pair, such as the contact angle (θ). Herein, the use of a (numerical) theoretical model of capillary rise kinetics for describing the experimental data of meniscus height versus time for a particular ionic liquid (BMI.BF4) rising in a glass capillary tube is reported, assessing also the suitability of estimating the ionic liquid/glass contact angle (θ) from the fitting procedure involved. Capillary rise experiments were conducted in glass capillaries with 1 mm internal diameter and digital images from the corresponding videos (obtained with an smartphone high-resolution camera and a LED light box) were semi-automatically processed/analyzed using an algorithm (script) specifically developed for such purpose. A relatively good agreement between the experimental data and the theoretical predictions was found for the ionic liquid (BMI.BF4) studied, in particular with respect to the shape of the height versus time curve. From fitting the theoretical model to the experimental data, a value of 43.7±6.4∘ was obtained for the contact angle (θ) of BMI.BF4 in glass at a temperature of 23.7±0.4∘C. The results obtained validated the utilized methodology for determining the contact angle of ionic liquids in (transparent) solid surfaces and also showed its adequacy for studying the kinetics of capillary rise of such liquids in small vertical capillaries. |
| first_indexed | 2024-03-13T04:54:09Z |
| format | Article |
| id | doaj.art-fd3420c6f45c48c491e07a88e2cfc0ae |
| institution | Directory Open Access Journal |
| issn | 2772-4220 |
| language | English |
| last_indexed | 2024-03-13T04:54:09Z |
| publishDate | 2023-06-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Ionic Liquids |
| spelling | doaj.art-fd3420c6f45c48c491e07a88e2cfc0ae2023-06-18T05:04:08ZengElsevierJournal of Ionic Liquids2772-42202023-06-0131100049Capillary rise kinetics of 1-butyl-3-methyl-imidazolium tetrafluoroborate (BMI.BF4) in a single glass tube: Experiment and modelingNicholas Chies de Souza Castro0Gustavo Tognon1Alexandre Hahn Englert2Department of Physical Chemistry, Institute of Chemistry, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, BrazilDepartment of Physical Chemistry, Institute of Chemistry, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, BrazilCorresponding author.; Department of Physical Chemistry, Institute of Chemistry, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, BrazilIonic liquids are materials composed purely of cations and anions which melt at or below 100 ∘C. For applications involving wetting of a solid surface by an ionic liquid or the flow of ionic liquid through capillaries, one must know the wetting properties of the ionic liquid/solid pair, such as the contact angle (θ). Herein, the use of a (numerical) theoretical model of capillary rise kinetics for describing the experimental data of meniscus height versus time for a particular ionic liquid (BMI.BF4) rising in a glass capillary tube is reported, assessing also the suitability of estimating the ionic liquid/glass contact angle (θ) from the fitting procedure involved. Capillary rise experiments were conducted in glass capillaries with 1 mm internal diameter and digital images from the corresponding videos (obtained with an smartphone high-resolution camera and a LED light box) were semi-automatically processed/analyzed using an algorithm (script) specifically developed for such purpose. A relatively good agreement between the experimental data and the theoretical predictions was found for the ionic liquid (BMI.BF4) studied, in particular with respect to the shape of the height versus time curve. From fitting the theoretical model to the experimental data, a value of 43.7±6.4∘ was obtained for the contact angle (θ) of BMI.BF4 in glass at a temperature of 23.7±0.4∘C. The results obtained validated the utilized methodology for determining the contact angle of ionic liquids in (transparent) solid surfaces and also showed its adequacy for studying the kinetics of capillary rise of such liquids in small vertical capillaries.http://www.sciencedirect.com/science/article/pii/S2772422023000010AFM |
| spellingShingle | Nicholas Chies de Souza Castro Gustavo Tognon Alexandre Hahn Englert Capillary rise kinetics of 1-butyl-3-methyl-imidazolium tetrafluoroborate (BMI.BF4) in a single glass tube: Experiment and modeling Journal of Ionic Liquids AFM |
| title | Capillary rise kinetics of 1-butyl-3-methyl-imidazolium tetrafluoroborate (BMI.BF4) in a single glass tube: Experiment and modeling |
| title_full | Capillary rise kinetics of 1-butyl-3-methyl-imidazolium tetrafluoroborate (BMI.BF4) in a single glass tube: Experiment and modeling |
| title_fullStr | Capillary rise kinetics of 1-butyl-3-methyl-imidazolium tetrafluoroborate (BMI.BF4) in a single glass tube: Experiment and modeling |
| title_full_unstemmed | Capillary rise kinetics of 1-butyl-3-methyl-imidazolium tetrafluoroborate (BMI.BF4) in a single glass tube: Experiment and modeling |
| title_short | Capillary rise kinetics of 1-butyl-3-methyl-imidazolium tetrafluoroborate (BMI.BF4) in a single glass tube: Experiment and modeling |
| title_sort | capillary rise kinetics of 1 butyl 3 methyl imidazolium tetrafluoroborate bmi bf4 in a single glass tube experiment and modeling |
| topic | AFM |
| url | http://www.sciencedirect.com/science/article/pii/S2772422023000010 |
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