1
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Raj S, Ramamurthy K. Classification of surfactants and admixtures for producing stable aqueous foam. Adv Colloid Interface Sci 2024; 331:103234. [PMID: 38889625 DOI: 10.1016/j.cis.2024.103234] [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: 12/05/2023] [Revised: 06/11/2024] [Accepted: 06/11/2024] [Indexed: 06/20/2024]
Abstract
Surfactants and foam have captured the interest of researchers worldwide due to their unique behavior of surface activity, the dynamic nature of foam formation, and simultaneous destruction. The present review focuses on the surfactants' classification, surfactant-solvent interaction, foam formation, characteristics, and a range of admixtures to enhance the foam performance. Although surfactants have been researched and developed for decades, recently, their sustainability has been given special attention. One such aspect is the development of green foaming agents from natural and renewable sources and assessing their suitability for different applications. Further, widely researched parameters are the type of surfactant, surfactant concentration, surfactant-solvent interaction, and foam production method on the foamability of a surfactant solution and related foam characteristics, including stability and texture. However, still, there is no rule to predict the best foam. Another vital concern is the non-standardization of foam assessment methods across industries and regions. Recently, research has progressed in identifying suitable admixtures for foam performance enhancement and utilizing them to produce stable foams for application in enhanced oil recovery, drug delivery, and manufacturing of aerated food products and foamed concrete. Although foam stabilization using various admixtures has been recognized well in the literature, the underlying mechanism requires further research. The interaction of surfactant and admixtures in solution is complicated and requires more research.
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Affiliation(s)
- Shubham Raj
- Building Technology and Construction Management Division, Department of Civil Engineering, Indian Institute of Technology Madras, Chennai, India
| | - K Ramamurthy
- Building Technology and Construction Management Division, Department of Civil Engineering, Indian Institute of Technology Madras, Chennai, India.
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2
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Braun L, von Klitzing R. When Bulk Matters: Disentanglement of the Role of Polyelectrolyte/Surfactant Complexes at Surfaces and in the Bulk of Foam Films. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023; 39:111-118. [PMID: 36525629 DOI: 10.1021/acs.langmuir.2c02260] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Foam films display exciting systems as on one hand they dictate the performance of macroscopic foams and on the other hand they allow studies of surface forces. With regard to surface forces, we attempt to disentangle the effect of the foam film surfaces and the foam film bulk. For that, we study the influence of salt (LiBr) on foam films formed by mixtures of oppositely charged polyelectrolyte and surfactant: anionic monosulfonated polyphenylene sulfone (sPSO2-220) and cationic tetradecyltrimethylammonium bromide (C14TAB). Adding a small amount of salt (≤10-3 M) decreases the foam film stability due to a weakened electrostatic net repulsion. In contrast, a large amount of salt (10-2 M) unexpectedly increases the foam film stability. Disjoining pressure isotherms reveal that the increased stability is due to an additional steric stabilization, which is attributed to sPSO2-220/C14TAB complexes in the film bulk. These bulk complexes also contribute to the measured apparent surface potential between the two air/water interfaces. We find, for the first time, the formation of Newton black films for mixtures of anionic polyelectrolytes and cationic surfactants.
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Affiliation(s)
- Larissa Braun
- Soft Matter at Interfaces, Department of Physics, Technische Universität Darmstadt, Hochschulstraße 8, 64289Darmstadt, Germany
| | - Regine von Klitzing
- Soft Matter at Interfaces, Department of Physics, Technische Universität Darmstadt, Hochschulstraße 8, 64289Darmstadt, Germany
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3
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Ritacco HA. Polyelectrolyte/Surfactant Mixtures: A Pathway to Smart Foams. ACS OMEGA 2022; 7:36117-36136. [PMID: 36278099 PMCID: PMC9583308 DOI: 10.1021/acsomega.2c05739] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/04/2022] [Accepted: 09/26/2022] [Indexed: 05/10/2023]
Abstract
This review deals with liquid foams stabilized by polyelectrolyte/surfactant (PS) complexes in aqueous solution. It briefly reviews all the important aspects of foam physics at several scales, from interfaces to macroscopic foams, needed to understand the basics of these complex systems, focusing on those particular aspects of foams stabilized by PS mixtures. The final section includes a few examples of smart foams based on PS complexes that have been reported recently in the literature. These PS complexes open an opportunity to develop new intelligent dispersed materials with potential in many fields, such as oil industry, environmental remediation, and pharmaceutical industry, among others. However, there is much work to be done to understand the mechanism involved in the stabilization of foams with PS complexes. Understanding those underlying mechanisms is vital to successfully formulate smart systems. This review is written in the hope of stimulating further work in the physics of PS foams and, particularly, in the search for responsive foams based on polymer-surfactant mixtures.
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4
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Min F, Zhou P, Huang Z, Qiao Y, Yu C, Qu Z, Shi X, Li Z, Jiang L, Zhang Z, Yan X, Song Y. A Bubble-Assisted Approach for Patterning Nanoscale Molecular Aggregates. Angew Chem Int Ed Engl 2021; 60:16547-16553. [PMID: 33974728 DOI: 10.1002/anie.202103765] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2021] [Revised: 05/10/2021] [Indexed: 11/11/2022]
Abstract
We demonstrate a new approach to pattern functional organic molecules with a template of foams, and achieve a resolution of sub 100 nm. The bubble-assisted assembly (BAA) process is consisted of two periods, including bubble evolution and molecular assembly, which are dominated by the Laplace pressure and molecular interactions, respectively. Using TPPS (meso-tetra(4-sulfonatophenyl) porphyrin), we systematically investigate the patterns and assembly behaviour in the bubble system with a series of characterizations, which show good uniformity in nanoscale resolution. Theoretical simulations reveal that TPPS's J-aggregates contribute to the ordered construction of molecular patterns. Finally, we propose an empirical rule for molecular patterning approach, that the surfactant and functional molecules should have the same type of charge in a two-component system. This approach exhibits promising feasibility to assemble molecular patterns at nanoscale resolution for micro/nano functional devices.
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Affiliation(s)
- Fanyi Min
- Key Laboratory of Green Printing, Institute of Chemistry, Chinese Academy of Sciences (ICCAS), Beijing National Laboratory for Molecular Sciences (BNLMS), University of the Chinese Academy of Sciences, Beijing, 100190, P. R. China
| | - Peng Zhou
- State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100190, P. R. China
| | - Zhandong Huang
- Department of Mechanical and Materials Engineering, The University of Western Ontario London, Ontario, N6A 5B9, Canada
| | - Yali Qiao
- Key Laboratory of Green Printing, Institute of Chemistry, Chinese Academy of Sciences (ICCAS), Beijing National Laboratory for Molecular Sciences (BNLMS), University of the Chinese Academy of Sciences, Beijing, 100190, P. R. China
| | - Changhui Yu
- State Key Laboratory of Molecular Reaction Dynamics, CAS Research/Education Centre for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing National Laboratory of Molecular Sciences, University of the Chinese Academy of Sciences, Beijing, 100190, P. R. China
| | - Zhiyuan Qu
- Key Laboratory of Green Printing, Institute of Chemistry, Chinese Academy of Sciences (ICCAS), Beijing National Laboratory for Molecular Sciences (BNLMS), University of the Chinese Academy of Sciences, Beijing, 100190, P. R. China
| | - Xiaosong Shi
- Key Laboratory of Organic Solids, Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China
| | - Zheng Li
- Key Laboratory of Green Printing, Institute of Chemistry, Chinese Academy of Sciences (ICCAS), Beijing National Laboratory for Molecular Sciences (BNLMS), University of the Chinese Academy of Sciences, Beijing, 100190, P. R. China
| | - Lang Jiang
- Key Laboratory of Organic Solids, Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China
| | - Zhen Zhang
- State Key Laboratory of Molecular Reaction Dynamics, CAS Research/Education Centre for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing National Laboratory of Molecular Sciences, University of the Chinese Academy of Sciences, Beijing, 100190, P. R. China
| | - Xuehai Yan
- State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100190, P. R. China
| | - Yanlin Song
- Key Laboratory of Green Printing, Institute of Chemistry, Chinese Academy of Sciences (ICCAS), Beijing National Laboratory for Molecular Sciences (BNLMS), University of the Chinese Academy of Sciences, Beijing, 100190, P. R. China
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5
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Min F, Zhou P, Huang Z, Qiao Y, Yu C, Qu Z, Shi X, Li Z, Jiang L, Zhang Z, Yan X, Song Y. A Bubble‐Assisted Approach for Patterning Nanoscale Molecular Aggregates. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202103765] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Fanyi Min
- Key Laboratory of Green Printing Institute of Chemistry Chinese Academy of Sciences (ICCAS) Beijing National Laboratory for Molecular Sciences (BNLMS) University of the Chinese Academy of Sciences Beijing 100190 P. R. China
| | - Peng Zhou
- State Key Laboratory of Biochemical Engineering Institute of Process Engineering Chinese Academy of Sciences Beijing 100190 P. R. China
| | - Zhandong Huang
- Department of Mechanical and Materials Engineering The University of Western Ontario London Ontario N6A 5B9 Canada
| | - Yali Qiao
- Key Laboratory of Green Printing Institute of Chemistry Chinese Academy of Sciences (ICCAS) Beijing National Laboratory for Molecular Sciences (BNLMS) University of the Chinese Academy of Sciences Beijing 100190 P. R. China
| | - Changhui Yu
- State Key Laboratory of Molecular Reaction Dynamics CAS Research/Education Centre for Excellence in Molecular Sciences Institute of Chemistry Chinese Academy of Sciences Beijing National Laboratory of Molecular Sciences University of the Chinese Academy of Sciences Beijing 100190 P. R. China
| | - Zhiyuan Qu
- Key Laboratory of Green Printing Institute of Chemistry Chinese Academy of Sciences (ICCAS) Beijing National Laboratory for Molecular Sciences (BNLMS) University of the Chinese Academy of Sciences Beijing 100190 P. R. China
| | - Xiaosong Shi
- Key Laboratory of Organic Solids Beijing National Laboratory for Molecular Sciences Institute of Chemistry Chinese Academy of Sciences Beijing 100190 P. R. China
| | - Zheng Li
- Key Laboratory of Green Printing Institute of Chemistry Chinese Academy of Sciences (ICCAS) Beijing National Laboratory for Molecular Sciences (BNLMS) University of the Chinese Academy of Sciences Beijing 100190 P. R. China
| | - Lang Jiang
- Key Laboratory of Organic Solids Beijing National Laboratory for Molecular Sciences Institute of Chemistry Chinese Academy of Sciences Beijing 100190 P. R. China
| | - Zhen Zhang
- State Key Laboratory of Molecular Reaction Dynamics CAS Research/Education Centre for Excellence in Molecular Sciences Institute of Chemistry Chinese Academy of Sciences Beijing National Laboratory of Molecular Sciences University of the Chinese Academy of Sciences Beijing 100190 P. R. China
| | - Xuehai Yan
- State Key Laboratory of Biochemical Engineering Institute of Process Engineering Chinese Academy of Sciences Beijing 100190 P. R. China
| | - Yanlin Song
- Key Laboratory of Green Printing Institute of Chemistry Chinese Academy of Sciences (ICCAS) Beijing National Laboratory for Molecular Sciences (BNLMS) University of the Chinese Academy of Sciences Beijing 100190 P. R. China
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6
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Braun L, Kühnhammer M, von Klitzing R. Stability of aqueous foam films and foams containing polymers: Discrepancies between different length scales. Curr Opin Colloid Interface Sci 2020. [DOI: 10.1016/j.cocis.2020.08.004] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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7
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Schabes BK, Richmond GL. Helping Strands: Polyelectrolyte Assists in Surfactant Assembly below Critical Micelle Concentration. J Phys Chem B 2020; 124:234-239. [PMID: 31804084 DOI: 10.1021/acs.jpcb.9b08692] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Strongly adsorbing polymer/surfactant (P/S) combinations have been proposed for long-term applications such as emulsion stabilization. However, P/S systems are known to exhibit nonequilibrium behavior despite steady-state surface characteristics. This work examines the coadsorption of dodecyltrimethylammonium bromide and sodium poly(styrene sulfonate) (PSS) using oil/water tensiometry, UV absorption, and vibrational sum frequency spectroscopy. To determine which features do not represent true equilibrium, the molecular details of PSS adsorption are compared for fresh and aged samples. At surfactant concentrations concurrent with bulk precipitation, significant differences between fresh and aged samples indicate that the strong initial coadsorption within this system is a nonequilibrium feature. We conclude that the long equilibration timescales arise from the slow assembly of non-adsorbing polyelectrolyte/micelle complexes below the critical micelle concentration. This study resolves a recent debate regarding system equilibria of surface-active P/S combinations at a water surface.
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Affiliation(s)
- Brandon K Schabes
- Department of Chemistry and Biochemistry , University of Oregon , Eugene , Oregon 97403 , United States
| | - Geraldine L Richmond
- Department of Chemistry and Biochemistry , University of Oregon , Eugene , Oregon 97403 , United States
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8
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Uhlig M, Löhmann O, Vargas Ruiz S, Varga I, von Klitzing R, Campbell RA. New structural approach to rationalize the foam film stability of oppositely charged polyelectrolyte/surfactant mixtures. Chem Commun (Camb) 2020; 56:952-955. [DOI: 10.1039/c9cc08470c] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
The foam film stability of polyelectrolyte/surfactant mixtures is rationalized using structural data from neutron reflectometry for the first time.
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Affiliation(s)
- Martin Uhlig
- Stranski-Laboratorium
- Technische Universität Berlin
- Berlin
- Germany
- Fraunhofer Center for Applied Nanotechnology (CAN)
| | - Oliver Löhmann
- Physics Department
- Technische Universität Darmstadt
- Darmstadt
- Germany
| | | | - Imre Varga
- Institute of Chemistry
- Eötvös Loránd University
- Budapest
- Hungary
| | - Regine von Klitzing
- Stranski-Laboratorium
- Technische Universität Berlin
- Berlin
- Germany
- Physics Department
| | - Richard A. Campbell
- Institut Laue-Langevin
- Grenoble
- France
- Division of Pharmacy and Optometry
- University of Manchester, Manchester
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9
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Synergy, competition, and the "hanging" polymer layer: Interactions between a neutral amphiphilic 'tardigrade' comb co-polymer with an anionic surfactant at the air-water interface. J Colloid Interface Sci 2019; 561:181-194. [PMID: 31830734 DOI: 10.1016/j.jcis.2019.11.017] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2019] [Revised: 11/03/2019] [Accepted: 11/05/2019] [Indexed: 12/21/2022]
Abstract
Understanding the structure of polymer/surfactant mixtures at the air-water interface is of fundamental importance and also of relevance to a variety of practical applications. Here, the complexation between a neutral 'tardigrade' comb co-polymer (consisting of a hydrophilic polyethylene glycol backbone with hydrophobic polyvinyl acetate grafts, PEG-g-PVAc) with an anionic surfactant (sodium dodecyl sulfate, SDS) at the air-water interface has been studied. Contrast-matched neutron reflectivity (NR) complemented by surface tension measurements allowed elucidation of the interfacial composition and structure of these mixed systems, as well as providing physical insights into the polymer/surfactant interactions at the air-water interface. For both polymer concentrations studied, below and above its critical aggregation concentration, cac, (0.2 cac and 2 cac, corresponding to 0.0002 wt% or 0.013 mM and 0.002 wt% or 0.13 mM respectively), we observed a synergistic cooperative behaviour at low surfactant concentrations with a 1-2 nm mixed interfacial layer; a competitive adsorption behaviour at higher surfactant concentrations was observed where the polymer was depleted from the air-water interface, with an overall interfacial layer thickness ~1.6 nm independent of the polymer concentration. The weakly associated polymer layer "hanging" proximally to the interface, however, played a role in enhancing foam stability, thus was relevant to the detergency efficacy in such polymer/surfactant mixtures in industrial formulations.
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10
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Schabes BK, Hopkins EJ, Richmond GL. Molecular Interactions Leading to the Coadsorption of Surfactant Dodecyltrimethylammonium Bromide and Poly(styrenesulfonate) at the Oil/Water Interface. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:7268-7276. [PMID: 31083894 DOI: 10.1021/acs.langmuir.9b00873] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
The strong synergistic adsorption of mixed polymer/surfactant (P/S) systems at the oil/water interface shows promise for applications such as oil remediation and emulsion stabilization, especially with respect to the formation of tunable mesoscopic multilayers. There is some evidence that a combination of dodecyltrimethylammonium bromide (DTAB) and sodium poly(styrenesulfonate) (PSS) exhibits the adsorption of a secondary P/S layer, though the structure of this layer has long eluded researchers. The focus of this study is to determine whether the DTAB-assisted adsorption of PSS at the oil/water interface occurs as a single layer or with subsequent multilayers. The study presented uses vibrational sum-frequency spectroscopy and interfacial tensiometry to determine the degree of PSS adsorption and orientation of its charged groups relative to the interface at three representative concentrations of DTAB. At low and intermediate DTAB concentrations, a single mixed DTAB/PSS monolayer adsorbs at the oil/water interface. No PSS adsorbs above the system critical micelle concentration. The interfacial charge is found to be similar to that of P/S complexes solvated in the aqueous solution. The surface adsorbate and P/S complexes in the bulk both exhibit a charge inversion at around the same DTAB concentration. This study demonstrates the importance of techniques which can differentiate between coadsorbing species and calls into question current models of P/S adsorption at an oil/water interface.
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Affiliation(s)
- Brandon K Schabes
- Department of Chemistry and Biochemistry , University of Oregon , Eugene , Oregon 97403 , United States
| | - Emma J Hopkins
- Department of Chemistry and Biochemistry , University of Oregon , Eugene , Oregon 97403 , United States
| | - Geraldine L Richmond
- Department of Chemistry and Biochemistry , University of Oregon , Eugene , Oregon 97403 , United States
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11
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Erasov V, Pokidko B, Pletnev MY. Features of aqueous polymer-stabilized foams particularly containing bentonite particles. J DISPER SCI TECHNOL 2019. [DOI: 10.1080/01932691.2019.1611445] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Vadim Erasov
- Department of Colloid Chemistry, Institute of Fine Chemical Technologies, MIREA – Russian Technological University, Moscow, Russia
| | - Boris Pokidko
- Department of Colloid Chemistry, Institute of Fine Chemical Technologies, MIREA – Russian Technological University, Moscow, Russia
| | - Michael Y. Pletnev
- Department of Colloid Chemistry, Institute of Fine Chemical Technologies, MIREA – Russian Technological University, Moscow, Russia
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12
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Dynamic interfacial properties and foamability of polyelectrolyte-surfactant mixtures. Colloids Surf A Physicochem Eng Asp 2019. [DOI: 10.1016/j.colsurfa.2018.11.030] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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13
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Veyskarami M, Hossein Ghazanfari M, Shafiei Y. Monitoring the behaviour of anionic polymer‐anionic surfactant stabilized foam in the absence and presence of oil: Bulk and bubble‐scale experimental analyses. CAN J CHEM ENG 2019. [DOI: 10.1002/cjce.23368] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Maziar Veyskarami
- Chemical and Petroleum Engineering DepartmentSharif University of TechnologyTehranIran
| | | | - Yousef Shafiei
- Chemical and Petroleum Engineering DepartmentSharif University of TechnologyTehranIran
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14
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Gradzielski M, Hoffmann I. Polyelectrolyte-surfactant complexes (PESCs) composed of oppositely charged components. Curr Opin Colloid Interface Sci 2018. [DOI: 10.1016/j.cocis.2018.01.017] [Citation(s) in RCA: 56] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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15
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Lencina MS, Fernández Miconi E, Fernández Leyes MD, Domínguez C, Cuenca E, Ritacco HA. Effect of surfactant concentration on the responsiveness of a thermoresponsive copolymer/surfactant mixture with potential application on “Smart” foams formulations. J Colloid Interface Sci 2018; 512:455-465. [DOI: 10.1016/j.jcis.2017.10.090] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2017] [Revised: 10/21/2017] [Accepted: 10/23/2017] [Indexed: 10/18/2022]
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16
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Braun L, Uhlig M, von Klitzing R, Campbell RA. Polymers and surfactants at fluid interfaces studied with specular neutron reflectometry. Adv Colloid Interface Sci 2017; 247:130-148. [PMID: 28822539 DOI: 10.1016/j.cis.2017.07.005] [Citation(s) in RCA: 62] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2017] [Accepted: 07/08/2017] [Indexed: 01/18/2023]
Abstract
This review addresses the advances made with specular neutron reflectometry in studies of aqueous mixtures of polymers and surfactants at fluid interfaces during the last decade (or so). The increase in neutron flux due to improvements in instrumentation has led to routine measurements at the air/water interface that are faster and involve samples with lower isotopic contrast than in previous experiments. One can now resolve the surface excess of a single deuterated component on the second time scale and the composition of a mixture on the minute time scale, and information about adsorption processes and dynamic rheology can also be accessed. Research areas addressed include the types of formed equilibrium surface structures, the link to foam film stability and the range of non-equilibrium effects that dominate the behavior of oppositely charged polyelectrolyte/surfactant mixtures, macroscopic film formation in like-charged polymer/surfactant mixtures, and the properties of mixtures of bio-polymers with surfactants and lipids.
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17
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Böttcher S, Eichhorn M, Drusch S. Factors Affecting Foamed Emulsions Prepared with an Extract from Quillaja saponaria Molina: Oil Droplet Size, pH and Presence of Beta-Lactoglobulin. FOOD BIOPHYS 2017. [DOI: 10.1007/s11483-017-9481-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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18
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Schulze-Zachau F, Braunschweig B. Structure of Polystyrenesulfonate/Surfactant Mixtures at Air-Water Interfaces and Their Role as Building Blocks for Macroscopic Foam. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:3499-3508. [PMID: 28318264 PMCID: PMC5391498 DOI: 10.1021/acs.langmuir.7b00400] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/06/2017] [Revised: 03/17/2017] [Indexed: 05/26/2023]
Abstract
Air/water interfaces were modified by oppositely charged poly(sodium 4-styrenesulfonate) (NaPSS) and hexadecyltrimethylammonium bromide (CTAB) polyelectrolyte/surfactant mixtures and were studied on a molecular level with vibrational sum-frequency generation (SFG), tensiometry, surface dilatational rheology and ellipsometry. In order to deduce structure property relations, our results on the interfacial molecular structure and lateral interactions of PSS-/CTA+ complexes were compared to the stability and structure of macroscopic foam as well as to bulk properties. For that, the CTAB concentration was fixed to 0.1 mM, while the NaPSS concentration was varied. At NaPSS monomer concentrations <0.1 mM, PSS-/CTA+ complexes start to replace free CTA+ surfactants at the interface and thus reduce the interfacial electric field in the process. This causes the O-H bands from interfacial H2O molecules in our SFG spectra to decrease substantially, which reach a local minimum in intensity close to equimolar concentrations. Once electrostatic repulsion is fully screened at the interface, hydrophobic PSS-/CTA+ complexes dominate and tend to aggregate at the interface and in the bulk solution. As a consequence, adsorbate layers with the highest film thickness, surface pressure, and dilatational elasticity are formed. These surface layers provide much higher stabilities and foamabilities of polyhedral macroscopic foams. Mixtures around this concentration show precipitation after a few days, while their surfaces to air are in a local equilibrium state. Concentrations >0.1 mM result in a significant decrease in surface pressure and a complete loss in foamability. However, SFG and surface dilatational rheology provide strong evidence for the existence of PSS-/CTA+ complexes at the interface. At polyelectrolyte concentrations >10 mM, air-water interfaces are dominated by an excess of free PSS- polyelectrolytes and small amounts of PSS-/CTA+ complexes which, however, provide higher foam stabilities compared to CTAB free foams. The foam structure undergoes a transition from wet to polyhedral foams during the collapse.
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Affiliation(s)
- Felix Schulze-Zachau
- Institute
of Physical Chemistry, Westfälische
Wilhelms-Universität Münster, Corrensstrasse 28/30, 48149 Münster, Germany
- Erlangen
Graduate School in Advanced Optical Technologies (SAOT), Friedrich-Alexander-Universität Erlangen-Nürnberg
(FAU), Paul-Gordan-Strasse
6, 91052 Erlangen, Germany
| | - Björn Braunschweig
- Institute
of Physical Chemistry, Westfälische
Wilhelms-Universität Münster, Corrensstrasse 28/30, 48149 Münster, Germany
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19
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Uhlig M, Miller R, Klitzing RV. Surface adsorption of sulfonated poly(phenylene sulfone)/C14TAB mixtures and its correlation with foam film stability. Phys Chem Chem Phys 2016; 18:18414-23. [DOI: 10.1039/c6cp02256a] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Polyelectrolyte/surfactant mixtures of rigid monosulfonated poly(phenylene sulfone) (sPSO2-220) and tetradecyl trimethylammonium bromide (C14TAB) were investigated by surface tension, surface elasticity and foam film stability measurements.
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Affiliation(s)
- Martin Uhlig
- Stranski-Laboratorium
- Department of Chemistry
- Technische Universität Berlin
- D-10623 Berlin
- Germany
| | - Reinhard Miller
- Max Planck Institute of Colloids and Interfaces
- 14424 Potsdam
- Germany
| | - Regine von Klitzing
- Stranski-Laboratorium
- Department of Chemistry
- Technische Universität Berlin
- D-10623 Berlin
- Germany
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20
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Fauser H, Uhlig M, Miller R, Klitzing RV. Surface Adsorption of Oppositely Charged SDS:C12TAB Mixtures and the Relation to Foam Film Formation and Stability. J Phys Chem B 2015; 119:12877-86. [DOI: 10.1021/acs.jpcb.5b06231] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Heiko Fauser
- Stranski-Laboratorium,
Department of Chemistry, Technische Universitaet Berlin, Strasse des 17.Juni
124, 10623 Berlin, Germany
| | - Martin Uhlig
- Stranski-Laboratorium,
Department of Chemistry, Technische Universitaet Berlin, Strasse des 17.Juni
124, 10623 Berlin, Germany
| | - Reinhard Miller
- Max Planck Institute of Colloids and Interfaces, Am Muehlenberg 1, 14424 Potsdam, Germany
| | - Regine von Klitzing
- Stranski-Laboratorium,
Department of Chemistry, Technische Universitaet Berlin, Strasse des 17.Juni
124, 10623 Berlin, Germany
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21
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Zhang Y, Sharma V. Domain expansion dynamics in stratifying foam films: experiments. SOFT MATTER 2015; 11:4408-17. [PMID: 25903145 DOI: 10.1039/c5sm00066a] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
The stability, rheology and applications of foams, emulsions and colloidal sols depend on the hydrodynamics and thermodynamics of thin liquid films that separate bubbles, drops and particles respectively. Thin liquid films containing micelles, colloidal particles, liquid crystals or polyelectrolyte-surfactant mixtures exhibit step-wise thinning or stratification, often attributed to the layer-by-layer removal of the aforementioned supramolecular structures. Stratification proceeds through emergence and growth of thinner circular domains within a thicker film, and the domain expansion dynamics are the focus of this study. Domain and associated thickness variation in foam films made from sodium dodecyl sulfate (SDS) micellar solutions are examined using a Scheludko-type cell with a novel technique we call Interferometry Digital Imaging Optical Microscopy (IDIOM). Below 100 nm, stratification and drainage cause a thickness-dependent variation in reflected light intensity, visualized as progressively darker shades of gray. We show that the domain expansion dynamics exhibit two distinct growth regimes with characteristic scaling laws. Initially, the radius of the isolated domains grows with square root time, and the expansion rate can be characterized by an apparent diffusion constant. In contrast, after a section of the expanding domain coalesces with the Plateau border, the contact line between domain and the surrounding thicker region moves a constant velocity. We show that a similar transition from a constant diffusivity to a constant velocity regime is also realized when a topological instability occurs at the contact line between the growing thinner isolated domain and the surrounding thicker film. Though several studies have focused on the expansion dynamics of isolated domains that exhibit a diffusion-like scaling, the change in expansion kinetics observed after domains contact with the Plateau border has not been reported and analyzed before.
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Affiliation(s)
- Yiran Zhang
- Department of Chemical Engineering, University of Illinois at Chicago, Chicago, IL 60607, USA.
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22
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Gochev G. Thin liquid films stabilized by polymers and polymer/surfactant mixtures. Curr Opin Colloid Interface Sci 2015. [DOI: 10.1016/j.cocis.2015.03.003] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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23
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Fauser H, von Klitzing R, Campbell RA. Surface Adsorption of Oppositely Charged C14TAB-PAMPS Mixtures at the Air/Water Interface and the Impact on Foam Film Stability. J Phys Chem B 2014; 119:348-58. [DOI: 10.1021/jp509631b] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Heiko Fauser
- Stranski-Laboratorium
fuer Physikalische und Theoretische Chemie, Institut fuer Chemie, Technische Universitaet Berlin, Strasse des 17. Juni 124, D-10623 Berlin, Germany
| | - Regine von Klitzing
- Stranski-Laboratorium
fuer Physikalische und Theoretische Chemie, Institut fuer Chemie, Technische Universitaet Berlin, Strasse des 17. Juni 124, D-10623 Berlin, Germany
| | - Richard A. Campbell
- Institut Laue-Langevin, 6 rue
Jules Horowitz, BP 156, 38042 Grenoble , Cedex 9, France
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24
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Fameau AL, Carl A, Saint-Jalmes A, von Klitzing R. Responsive Aqueous Foams. Chemphyschem 2014; 16:66-75. [DOI: 10.1002/cphc.201402580] [Citation(s) in RCA: 82] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2014] [Indexed: 12/30/2022]
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