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Revealing the wetting mechanism of Li+-doped ionic liquids on the TiO2 surface. Chem Eng Sci 2023. [DOI: 10.1016/j.ces.2022.118211] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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2
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Marangoni instability of self-rewetting films modulated by chemical reactions flowing down a vertical fibre. Chem Eng Sci 2020. [DOI: 10.1016/j.ces.2020.115936] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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3
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Wang C, Qian C, Li Z, Wei N, Zhang N, Wang Y, He H. Molecular Insights into the Abnormal Wetting Behavior of Ionic Liquids Induced by the Solidified Ionic Layer. Ind Eng Chem Res 2020. [DOI: 10.1021/acs.iecr.0c00439] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Chenlu Wang
- Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas, Ministry of Education, Northwest A&F University, Yangling 712100, People’s Republic of China
| | - Cheng Qian
- Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas, Ministry of Education, Northwest A&F University, Yangling 712100, People’s Republic of China
| | - Zhen Li
- Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas, Ministry of Education, Northwest A&F University, Yangling 712100, People’s Republic of China
| | - Ning Wei
- Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas, Ministry of Education, Northwest A&F University, Yangling 712100, People’s Republic of China
- Jiangsu Key Laboratory of Advanced Food Manufacturing Equipment and Technology, Jiangnan University, Wuxi 214122, People’s Republic of China
| | - Ning Zhang
- Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas, Ministry of Education, Northwest A&F University, Yangling 712100, People’s Republic of China
| | - Yanlei Wang
- Beijing Key Laboratory of Ionic Liquids Clean Process, CAS Key Laboratory of Green Process and Engineering, State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, People’s Republic of China
| | - Hongyan He
- Beijing Key Laboratory of Ionic Liquids Clean Process, CAS Key Laboratory of Green Process and Engineering, State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, People’s Republic of China
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Sarma R, Mondal PK. Marangoni instability in a thin film heated from below: Effect of nonmonotonic dependence of surface tension on temperature. Phys Rev E 2018; 97:043105. [PMID: 29758642 DOI: 10.1103/physreve.97.043105] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2018] [Indexed: 06/08/2023]
Abstract
We investigate Marangoni instability in a thin liquid film resting on a substrate of low thermal conductivity and separated from the surrounding gas phase by a deformable free surface. Considering a nonmonotonic variation of surface tension with temperature, here we analytically derive the neutral stability curve for the monotonic and oscillatory modes of instability (for both the long-wave and short-wave perturbations) under the framework of linear stability analysis. For the long-wave instability, we derive a set of amplitude equations using the scaling k∼(Bi)^{1/2}, where k is the wave number and Bi is the Biot number. Through this investigation, we demonstrate that for such a fluid layer upon heating from below, both monotonic and oscillatory instability can appear for a certain range of the dimensionless parameters, viz., Biot number (Bi), Galileo number (Ga), and inverse capillary number (Σ). Moreover, we unveil, through this study, the influential role of the above-mentioned parameters on the stability of the system and identify the critical values of these parameters above which instability initiates in the liquid layer.
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Affiliation(s)
- Rajkumar Sarma
- Department of Mechanical Engineering, Indian Institute of Technology Guwahati, Assam, 781039, India
| | - Pranab Kumar Mondal
- Department of Mechanical Engineering, Indian Institute of Technology Guwahati, Assam, 781039, India
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5
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Goossens K, Lava K, Bielawski CW, Binnemans K. Ionic Liquid Crystals: Versatile Materials. Chem Rev 2016; 116:4643-807. [PMID: 27088310 DOI: 10.1021/cr400334b] [Citation(s) in RCA: 411] [Impact Index Per Article: 51.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
This Review covers the recent developments (2005-2015) in the design, synthesis, characterization, and application of thermotropic ionic liquid crystals. It was designed to give a comprehensive overview of the "state-of-the-art" in the field. The discussion is focused on low molar mass and dendrimeric thermotropic ionic mesogens, as well as selected metal-containing compounds (metallomesogens), but some references to polymeric and/or lyotropic ionic liquid crystals and particularly to ionic liquids will also be provided. Although zwitterionic and mesoionic mesogens are also treated to some extent, emphasis will be directed toward liquid-crystalline materials consisting of organic cations and organic/inorganic anions that are not covalently bound but interact via electrostatic and other noncovalent interactions.
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Affiliation(s)
- Karel Goossens
- Center for Multidimensional Carbon Materials (CMCM), Institute for Basic Science (IBS) , Ulsan 689-798, Republic of Korea.,Department of Chemistry, KU Leuven , Celestijnenlaan 200F, P.O. Box 2404, B-3001 Heverlee, Belgium
| | - Kathleen Lava
- Department of Chemistry, KU Leuven , Celestijnenlaan 200F, P.O. Box 2404, B-3001 Heverlee, Belgium.,Department of Organic and Macromolecular Chemistry, Ghent University , Krijgslaan 281 S4, B-9000 Ghent, Belgium
| | - Christopher W Bielawski
- Center for Multidimensional Carbon Materials (CMCM), Institute for Basic Science (IBS) , Ulsan 689-798, Republic of Korea.,Department of Chemistry and Department of Energy Engineering, Ulsan National Institute of Science and Technology (UNIST) , Ulsan 689-798, Republic of Korea
| | - Koen Binnemans
- Department of Chemistry, KU Leuven , Celestijnenlaan 200F, P.O. Box 2404, B-3001 Heverlee, Belgium
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Wojnarowska Z, Knapik J, Rams-Baron M, Jedrzejowska A, Paczkowska M, Krause A, Cielecka-Piontek J, Jaworska M, Lodowski P, Paluch M. Amorphous Protic Ionic Systems as Promising Active Pharmaceutical Ingredients: The Case of the Sumatriptan Succinate Drug. Mol Pharm 2016; 13:1111-22. [PMID: 26836258 DOI: 10.1021/acs.molpharmaceut.5b00911] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
In this article, we highlight the benefits coming from the application of amorphous protic ionic systems as active pharmaceutical ingredients (APIs). Using the case of the sumatriptan (STR) drug, we show that the conversion of nonionic API to partially ionized amorphous protic succinate salt (STR SUCC) brings a substantial improvement in apparent solubility. Since in general the disordered systems reveal a tendency to self-arrangement during storage, the dominant part of this article is dedicated to the physical stability issue of sumatriptan and its ionic counterpart. To recognize the crystallization tendency of the studied systems, the calorimetric measurements were performed. Additionally, the role of ion dynamics in spontaneous nucleation of amorphous sumatriptan succinate is discussed. The differential scanning calorimetry analysis of ionic and nonionic sumatriptan reveals many similarities in thermal properties of these APIs as well as distinct differences in their resistance against crystallization in the supercooled liquid state. To determine the long-term physical stability of STR SUCC at room temperature conditions, the time scale of structural relaxation below their glass transition temperatures is estimated. We show that in contrast to nonionic materials, τα predictions of STR SUCC are much more complex and require aging experiments.
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Affiliation(s)
- Z Wojnarowska
- Institute of Physics, University of Silesia , Uniwersytecka 4, 40-007 Katowice, Poland.,SMCEBI , 75 Pulku Piechoty 1A, 41-500 Chorzow, Poland
| | - J Knapik
- Institute of Physics, University of Silesia , Uniwersytecka 4, 40-007 Katowice, Poland.,SMCEBI , 75 Pulku Piechoty 1A, 41-500 Chorzow, Poland
| | - M Rams-Baron
- Institute of Physics, University of Silesia , Uniwersytecka 4, 40-007 Katowice, Poland.,SMCEBI , 75 Pulku Piechoty 1A, 41-500 Chorzow, Poland
| | - A Jedrzejowska
- Institute of Physics, University of Silesia , Uniwersytecka 4, 40-007 Katowice, Poland.,SMCEBI , 75 Pulku Piechoty 1A, 41-500 Chorzow, Poland
| | - M Paczkowska
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Poznan University of Medical Sciences , Grunwaldzka 6, 60-780 Poznań, Poland
| | - A Krause
- PozLab sp. z.o.o. Parkowa 2, 60-775 Poznań, Poland
| | - J Cielecka-Piontek
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Poznan University of Medical Sciences , Grunwaldzka 6, 60-780 Poznań, Poland
| | - M Jaworska
- Institute of Chemistry, Department of Theoretical Chemistry, University of Silesia , Szkolna 9, 40-006 Katowice, Poland
| | - P Lodowski
- Institute of Chemistry, Department of Theoretical Chemistry, University of Silesia , Szkolna 9, 40-006 Katowice, Poland
| | - M Paluch
- Institute of Physics, University of Silesia , Uniwersytecka 4, 40-007 Katowice, Poland.,SMCEBI , 75 Pulku Piechoty 1A, 41-500 Chorzow, Poland
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Pereira MM, Kurnia KA, Sousa FL, Silva NJO, Lopes-da-Silva JA, Coutinho JAP, Freire MG. Contact angles and wettability of ionic liquids on polar and non-polar surfaces. Phys Chem Chem Phys 2015; 17:31653-31661. [PMID: 26554705 PMCID: PMC5024753 DOI: 10.1039/c5cp05873b] [Citation(s) in RCA: 59] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Many applications involving ionic liquids (ILs) require the knowledge of their interfacial behaviour, such as wettability and adhesion. In this context, herein, two approaches were combined aiming at understanding the impact of the IL chemical structures on their wettability on both polar and non-polar surfaces, namely: (i) the experimental determination of the contact angles of a broad range of ILs (covering a wide number of anions of variable polarity, cations, and cation alkyl side chain lengths) on polar and non-polar solid substrates (glass, Al-plate, and poly-(tetrafluoroethylene) (PTFE)); and (ii) the correlation of the experimental contact angles with the cation-anion pair interaction energies generated by the Conductor-like Screening Model for Real Solvents (COSMO-RS). The combined results reveal that the hydrogen-bond basicity of ILs, and thus the IL anion, plays a major role through their wettability on both polar and non-polar surfaces. The increase of the IL hydrogen-bond accepting ability leads to an improved wettability of more polar surfaces (lower contact angles) while the opposite trend is observed on non-polar surfaces. The cation nature and alkyl side chain lengths have however a smaller impact on the wetting ability of ILs. Linear correlations were found between the experimental contact angles and the cation-anion hydrogen-bonding and cation ring energies, estimated using COSMO-RS, suggesting that these features primarily control the wetting ability of ILs. Furthermore, two-descriptor correlations are proposed here to predict the contact angles of a wide variety of ILs on glass, Al-plate, and PTFE surfaces. A new extended list is provided for the contact angles of ILs on three surfaces, which can be used as a priori information to choose appropriate ILs before a given application.
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Affiliation(s)
- Matheus M. Pereira
- CICECO – Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal
| | - Kiki A. Kurnia
- CICECO – Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal
- Center of Research in Ionic Liquids, Department of Chemical Engineering, Universiti Teknologi PETRONAS, Bandar Seri Iskandar, 32610 Perak, Malaysia
| | - Filipa L. Sousa
- CICECO – Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal
| | - Nuno J. O. Silva
- CICECO – Aveiro Institute of Materials, Departamento de Física, Universidade de Aveiro, 3810-193 Aveiro, Portugal
| | | | - João A. P. Coutinho
- CICECO – Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal
| | - Mara G. Freire
- CICECO – Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal
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9
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Sanan R, Kaur R, Mahajan RK. Micellar transitions in catanionic ionic liquid–ibuprofen aqueous mixtures; effects of composition and dilution. RSC Adv 2014. [DOI: 10.1039/c4ra10840j] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Interactions between 1-dodecyl-3-methylimidazolium chloride and ibuprofen molecules in aqueous solution form catanionic mixtures, with morphologies of mixed micelles dependent on solution composition.
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Affiliation(s)
- Reshu Sanan
- Department of Chemistry
- UGC-Centre for Advanced Studies
- Guru Nanak Dev University
- Amritsar-143005, India
| | - Rajwinder Kaur
- Department of Chemistry
- UGC-Centre for Advanced Studies
- Guru Nanak Dev University
- Amritsar-143005, India
| | - Rakesh Kumar Mahajan
- Department of Chemistry
- UGC-Centre for Advanced Studies
- Guru Nanak Dev University
- Amritsar-143005, India
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Wojnarowska Z, Grzybowska K, Hawelek L, Swiety-Pospiech A, Masiewicz E, Paluch M, Sawicki W, Chmielewska A, Bujak P, Markowski J. Molecular dynamics studies on the water mixtures of pharmaceutically important ionic liquid lidocaine HCl. Mol Pharm 2012; 9:1250-61. [PMID: 22424553 DOI: 10.1021/mp2005609] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
In this paper the molecular dynamics of a common local-anesthetic drug, lidocaine hydrochloride (LD-HCl), and its water mixtures were investigated. By means of broadband dielectric spectroscopy and calorimetric measurements it was shown that even a small addition of water causes a significant effect on the relaxation dynamics of analyzed protic ionic liquid. Apart from the two well-resolved relaxations (σ- and γ-processes) and the β-mode, identified as the JG-process, observed for anhydrous LD-HCl, a new relaxation peak (υ) is visible in the dielectric spectra of aqueous mixtures of this drug. Additionally, the significant effect of the water on the glass transition temperature of LD-HCl was found. The sample characterized with mole fraction of water X(w) = 0.44 reveals the glass transition temperature T(g), 42 K lower than that of anhydrous material (307 K). Finally, it was shown that by amorphization of the hydrochloride salt of lidocaine it is possible to obtain its room temperature ionic liquid form.
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Affiliation(s)
- Z Wojnarowska
- Institute of Physics, University of Silesia, ul Uniwersytecka 4, 40-007 Katowice, Poland.
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