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Wierenga PA, Basheva ES, Delahaije RJBM. Variations in foam collapse and thin film stability with constant interfacial and bulk properties. Adv Colloid Interface Sci 2023; 312:102845. [PMID: 36709573 DOI: 10.1016/j.cis.2023.102845] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2022] [Revised: 01/20/2023] [Accepted: 01/20/2023] [Indexed: 01/24/2023]
Abstract
The stability of foams is commonly linked to the interfacial properties of the proteins and other surfactants used. This study aimed to use these relationships to explain differences in foam stability observed among similar beer samples from different breweries. The foam stability was different for each sample (Nibem foam stability ranged from 206 to 300 s), but ranking was similar for all three foaming methods used, thus independent of the method, gas, etc. Differences in foam stability were dominated by differences in coalescence, as illustrated by the correlation with the stability of single bubbles and thin liquid films. The differences in coalescence stability could not be explained by the measured interfacial properties (e.g. surface pressure, adsorption rate, dilatational modulus and surface shear viscosity), or the bulk properties (concentration, pH, ionic strength, viscosity), since they were similar for all samples. The drainage rates and disjoining pressure isotherms measured in thin liquid films were also similar for all samples, further limiting the options to explain the differences in foam stability using known arguments. The differences in coalescence stability of the thin films was shown to depend on the liquid in between the adsorbed layers of the thin film, using a modified capillary cell to exchange this liquid (to a buffer, or one of the other samples). This illustrates the need to review our current understanding and to develop new methods both for experimental study and theoretical description, to better understand foam stability in the future.
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Affiliation(s)
- Peter Alexander Wierenga
- Laboratory of Food Chemistry, Wageningen UR, Bornse Weilanden 9, Wageningen 6708, WG, the Netherlands.
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Deodhar S, Rohilla P, Manivannan M, Thampi SP, Basavaraj MG. Robust Method to Determine Critical Micelle Concentration via Spreading Oil Drops on Surfactant Solutions. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2020; 36:8100-8110. [PMID: 32579372 DOI: 10.1021/acs.langmuir.0c00908] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The spreading of a liquid on another is often encountered in oil spills and coatings and is also of industrial relevance in pharmaceuticals and petrochemicals. In this study, the spreading of oil drops on aqueous solutions containing cationic, anionic, and nonionic surfactants over a wide range of surfactant concentrations is investigated. The spreading behavior quantified by measuring the time evolution of the projected area of the oil lens reveals the occurrence of a maximum, which is strongly dependent on the concentration of the surfactant in the aqueous solution. Our experiments show that this dependence is different at concentrations above and below the critical micelle concentration (CMC) of the surfactant and can be captured by two straight lines of different slopes. Interestingly, these two straight lines intersect at a concentration that coincides with the CMC of the surfactants in solution. We find that this behavior is universal as shown by performing experiments with different types of surfactants, their purity, and other system variables. Thus, we propose a method to unambiguously determine the CMC of surfactant solutions compared to the conventional techniques. The proposed method is simple, versatile, and applicable for the determination of CMC of both ionic and nonionic surfactants.
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Affiliation(s)
- Swaraj Deodhar
- Polymer Engineering and Colloid Sciences Lab, Department of Chemical Engineering, Indian Institute of Technology Madras, Sardar Patel Road, Adyar, IIT P.O., Chennai 600036, India
| | - Pankaj Rohilla
- Polymer Engineering and Colloid Sciences Lab, Department of Chemical Engineering, Indian Institute of Technology Madras, Sardar Patel Road, Adyar, IIT P.O., Chennai 600036, India
| | - M Manivannan
- Department of Applied Mechanics, Indian Institute of Technology Madras, Sardar Patel Road, Adyar, IIT P.O., Chennai 600036, India
| | - Sumesh P Thampi
- Polymer Engineering and Colloid Sciences Lab, Department of Chemical Engineering, Indian Institute of Technology Madras, Sardar Patel Road, Adyar, IIT P.O., Chennai 600036, India
| | - Madivala G Basavaraj
- Polymer Engineering and Colloid Sciences Lab, Department of Chemical Engineering, Indian Institute of Technology Madras, Sardar Patel Road, Adyar, IIT P.O., Chennai 600036, India
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Schäfer J, Hlawitschka MW, Attarakih MM, Bart H. Experimental investigation of local bubble properties: Comparison to the sectional quadrature method of moments. AIChE J 2019. [DOI: 10.1002/aic.16694] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Jan Schäfer
- Chair of Separation Science and TechnologyTU Kaiserslautern Kaiserslautern Germany
| | - Mark W. Hlawitschka
- Chair of Separation Science and TechnologyTU Kaiserslautern Kaiserslautern Germany
| | - Menwer M. Attarakih
- School of Engineering Chemical Engineering DepartmentThe University of Jordan Amman Jordan
| | - Hans‐Jörg Bart
- Chair of Separation Science and TechnologyTU Kaiserslautern Kaiserslautern Germany
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Weheliye WH, Dong T, Angeli P. On the effect of surfactants on drop coalescence at liquid/liquid interfaces. Chem Eng Sci 2017. [DOI: 10.1016/j.ces.2016.12.009] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Tan L, Wong K, Connor D, Fakhim B, Behnia M, Parsi K. Generation of sclerosant foams by mechanical methods increases the foam temperature. Phlebology 2016; 32:501-505. [PMID: 27738239 DOI: 10.1177/0268355516671625] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Objective To investigate the effect of agitation on foam temperature. Methods Sodium tetradecyl sulphate and polidocanol were used. Prior to foam generation, the sclerosant and all constituent equipment were cooled to 4-25℃ and compared with cooling the sclerosant only. Foam was generated using a modified Tessari method. During foam agitation, the temperature change was measured using a thermocouple for 120 s. Results Pre-cooling all the constituent equipment resulted in a cooler foam in comparison with only cooling the sclerosant. A starting temperature of 4℃ produced average foam temperatures of 12.5 and 13.2℃ for sodium tetradecyl sulphate and polidocanol, respectively. It was also found that only cooling the liquid sclerosant provided minimal cooling to the final foam temperature, with the temperature 20 and 20.5℃ for sodium tetradecyl sulphate and polidocanol, respectively. Conclusion The foam generation process has a noticeable impact on final foam temperature and needs to be taken into consideration when creating foam.
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Affiliation(s)
- Lulu Tan
- 1 Dermatology, Phlebology and Fluid Mechanics Research Laboratory, St Vincent's Centre for Applied Medical Research, Australia.,2 School of Aerospace, Mechanical & Mechatronic Engineering, University of Sydney, Australia
| | - Kaichung Wong
- 1 Dermatology, Phlebology and Fluid Mechanics Research Laboratory, St Vincent's Centre for Applied Medical Research, Australia.,2 School of Aerospace, Mechanical & Mechatronic Engineering, University of Sydney, Australia
| | - David Connor
- 1 Dermatology, Phlebology and Fluid Mechanics Research Laboratory, St Vincent's Centre for Applied Medical Research, Australia.,3 Faculty of Medicine, University of New South Wales, Australia
| | - Babak Fakhim
- 1 Dermatology, Phlebology and Fluid Mechanics Research Laboratory, St Vincent's Centre for Applied Medical Research, Australia.,2 School of Aerospace, Mechanical & Mechatronic Engineering, University of Sydney, Australia
| | - Masud Behnia
- 2 School of Aerospace, Mechanical & Mechatronic Engineering, University of Sydney, Australia.,4 Macquarie Graduate School of Management, Macquarie University, Australia
| | - Kurosh Parsi
- 1 Dermatology, Phlebology and Fluid Mechanics Research Laboratory, St Vincent's Centre for Applied Medical Research, Australia.,2 School of Aerospace, Mechanical & Mechatronic Engineering, University of Sydney, Australia.,3 Faculty of Medicine, University of New South Wales, Australia
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Bąk A, Podgórska W. Interfacial and surface tensions of toluene/water and air/water systems with nonionic surfactants Tween 20 and Tween 80. Colloids Surf A Physicochem Eng Asp 2016. [DOI: 10.1016/j.colsurfa.2016.05.091] [Citation(s) in RCA: 43] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Wang L. Modeling of bubble coalescence in saline water in the presence of flotation frothers. ACTA ACUST UNITED AC 2015. [DOI: 10.1016/j.minpro.2014.11.008] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Eftekhardadkhah M, Oye G. Induction and coverage times for crude oil droplets spreading on air bubbles. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2013; 47:14154-14160. [PMID: 24283896 DOI: 10.1021/es403574g] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
The interactions between crude oil droplets and air bubbles were studied by the droplet-bubble micromanipulator technique. Eight crude oils were investigated, and some aspects of the involved mechanisms were discussed. The induction time was measured for air bubbles approaching crude oil droplets in different aqueous phases. Distinct differences were observed in the presence and absence of salts, which showed the importance of long-ranged electrostatic repulsive forces on thin-film stability. The results also suggested that adsorption of dissolved hydrocarbons at air bubble surfaces may increase the potential energy barrier in the thin liquid film. Furthermore, the time needed for crude oil droplets to spread over the air bubble surfaces (referred to as coverage time) was determined for the crude oils. The results showed that the spreading velocity decreased with increasing viscosity of the crude oil. The detailed understanding of this type of interaction is considered to be a precursor for improving the oil removal efficiency during the flotation process.
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Affiliation(s)
- Mona Eftekhardadkhah
- Ugelstad Laboratory, Department of Chemical Engineering, Norwegian University of Science and Technology (NTNU) , N-7491 Trondheim, Norway
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Valenzuela G, Wong K, Connor D, Behnia M, Parsi K. Foam Sclerosants are More Stable at Lower Temperatures. Eur J Vasc Endovasc Surg 2013; 46:593-9. [DOI: 10.1016/j.ejvs.2013.08.012] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2013] [Accepted: 08/24/2013] [Indexed: 11/28/2022]
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Zhang Y, Liu Y, Ji R, Cai B, Wang F, Liu R. Discussion of the Drop Rest Phenomenon at Millimeter Scale and Coalescence of Droplets at Micrometer Scale. J DISPER SCI TECHNOL 2012. [DOI: 10.1080/01932691.2011.645704] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Affiliation(s)
- Ayanavilli Srinivas
- Department of Chemical Engineering, Indian Institute of Technology Guwahati, Guwahati 781039, Assam, India
| | - Pallab Ghosh
- Department of Chemical Engineering, Indian Institute of Technology Guwahati, Guwahati 781039, Assam, India
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