1
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Penfold J, Thomas RK. The Gibbs and Butler Equations and the Surface Activity of Dilute Aqueous Solutions of Strong and Weak Linear Polyelectrolyte-Surfactant Mixtures: The Roles of Surface Composition and Polydispersity. J Phys Chem B 2024; 128:8084-8102. [PMID: 39140373 PMCID: PMC11345831 DOI: 10.1021/acs.jpcb.4c03541] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2024] [Revised: 08/01/2024] [Accepted: 08/02/2024] [Indexed: 08/15/2024]
Abstract
In a previous paper, we applied a combination of direct measurements of both surface tension and surface excess in conjunction with the Gibbs equation to explain features of the adsorption and surface tension of mixtures of surfactants and strong linear polyelectrolytes at the air-water interface. This paper extends that model by including (i) the restrictions of the Butler equation for the behavior of the surface tension of mixed systems and (ii) the surface behavior of surfactant and linear weak polyelectrolyte mixtures, for which the inclusion of measurements of the surface excess and composition is shown to be particularly important. In addition, a closer examination of earlier data at higher concentrations provides evidence that the surface layering that is often observed in polyelectrolyte-surfactant systems is also an average equilibrium phenomenon and is driven by particular aggregation patterns that occur in some systems and not in others. Although the successful application of the Gibbs and Butler equations indicates that strong polyelectrolyte-surfactant systems can be described in terms of an average equilibrium over wide ranges of concentration, we have identified two concentration ranges where polydispersity in either polyelectrolyte molecular weight or composition results in significant time dependence of the surface behavior.
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Affiliation(s)
- Jeffrey Penfold
- Rutherford-Appleton
Laboratory, Chilton, Didcot, Oxfordshire OX11 0RA, U.K.
| | - Robert K. Thomas
- Physical
and Theoretical Chemistry Laboratory, South Parks Road, Oxford OX1 3QZ, U.K.
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2
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Márton P, Áder L, Kemény DM, Rácz A, Kovács D, Nagy N, Szabó GS, Hórvölgyi Z. Chitosan-Surfactant Composite Nanocoatings on Glass and Zinc Surfaces Prepared from Aqueous Solutions. Molecules 2024; 29:3111. [PMID: 38999062 PMCID: PMC11243197 DOI: 10.3390/molecules29133111] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2024] [Revised: 06/20/2024] [Accepted: 06/27/2024] [Indexed: 07/14/2024] Open
Abstract
Hydrophobic coatings from chitosan-surfactant composites (ca. 400 nm thick by UV-Vis spectroscopy) for possible corrosion protection were developed on glass and zinc substrates. The surfactants (sodium dodecyl sulfate, SDS or sodium dodecylbenzenesulfonate, and SDBS) were added to the chitosan by two methods: mixing the surfactants with the aqueous chitosan solutions before film deposition or impregnating the deposited chitosan films with surfactants from their aqueous solutions. For the mixed coatings, it was found that the lower surface tension of solutions (40-45 mN/m) corresponded to more hydrophobic (80-90°) coatings in every case. The hydrophobicity of the impregnated coatings was especially significant (88° for SDS and 100° for SDBS). Atomic force microscopy studies revealed a slight increase in roughness (max 1.005) for the most hydrophobic coatings. The accumulation of surfactants in the layer was only significant (0.8-1.0 sulfur atomic %) in the impregnated samples according to X-ray photoelectron spectroscopy. Polarization and electron impedance spectroscopy tests confirmed better barrier properties for these samples (40-50% pseudo-porosity instead of 94%). The degree of swelling in a water vapor atmosphere was significantly lower in the case of the impregnated coatings (ca. 25%) than that of the native ones (ca. 75%), measured by spectroscopic ellipsometry. Accordingly, good barrier layer properties require advantageous bulk properties in addition to surface hydrophobicity.
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Affiliation(s)
- Péter Márton
- Centre for Colloid Chemistry, Department of Physical Chemistry and Materials Science, Faculty of Chemical Technology and Biotechnology, Budapest University of Technology and Economics, Műegyetem rkp. 3, H-1111 Budapest, Hungary
| | - Liza Áder
- Centre for Colloid Chemistry, Department of Physical Chemistry and Materials Science, Faculty of Chemical Technology and Biotechnology, Budapest University of Technology and Economics, Műegyetem rkp. 3, H-1111 Budapest, Hungary
| | - Dávid Miklós Kemény
- Department of Materials Science and Engineering, Faculty of Mechanical Engineering, Budapest University of Technology and Economics, Műegyetem rkp. 3, H-1111 Budapest, Hungary
| | - Adél Rácz
- Centre for Energy Research, Institute for Technical Physics and Materials Science, Konkoly Thege Miklós út 29-33, H-1121 Budapest, Hungary
| | - Dorina Kovács
- Department of Materials Science and Engineering, Faculty of Mechanical Engineering, Budapest University of Technology and Economics, Műegyetem rkp. 3, H-1111 Budapest, Hungary
| | - Norbert Nagy
- Centre for Energy Research, Institute for Technical Physics and Materials Science, Konkoly Thege Miklós út 29-33, H-1121 Budapest, Hungary
| | - Gabriella Stefánia Szabó
- Department of Chemistry and Chemical Engineering of Hungarian Line of Study, Universitatea Babes-Bolyai, 11 Arany Janos str., RO-400028 Cluj-Napoca, Romania
| | - Zoltán Hórvölgyi
- Centre for Colloid Chemistry, Department of Physical Chemistry and Materials Science, Faculty of Chemical Technology and Biotechnology, Budapest University of Technology and Economics, Műegyetem rkp. 3, H-1111 Budapest, Hungary
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3
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Kaga H, Orita M, Endo K, Akamatsu M, Sakai K, Sakai H. Interaction between Sophorolipids and β-glucan in Aqueous Solutions. J Oleo Sci 2024; 73:169-176. [PMID: 38311407 DOI: 10.5650/jos.ess23189] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/10/2024] Open
Abstract
Skin disorders, including acne vulgaris, atopic dermatitis, and rosacea, are characterized by the presence of biofilms, which are communities of microorganisms. The mechanical stability of biofilms is attributed to one of their constituents-polysaccharides-which are secreted by microorganisms. Sophorolipids are biosurfactants with biofilm disruption and removal abilities and are expected to become alternatives for classical petrochemical-based surfactants in cosmetics. In this study, we investigated the influence of sophorolipids on β-glucan such as dispersion status, interaction mechanism, and configuration change as a model polysaccharide of biofilm in aqueous solution. Dynamic light scattering measurements showed that sophorolipids interfere with the aggregation of β- glucan in aqueous solutions. In contrast, sodium dodecyl sulfate (SDS), which is used as a typical surfactant reference, promotes the aggregation of β-glucan. The interaction between sophorolipids and β-glucan were investigated using surface tension measurements and isothermal titration calorimetry (ITC). Surface tension increased only near critical micelle concentration (CMC) region of sophorolipids in the presence of β-glucan. This suggests that the interaction occurred in the solution rather than at the air-liquid interface. Moreover, the results of ITC indicate that hydrophobic interactions were involved in this interaction. In addition, the results of optical rotation measurements indicate that sophorolipids did not unfold the triple helical structure of β-glucan. β-glucan dispersion was expected to be caused steric hindrance and electrostatic repulsion when sophorolipids interacted with β-glucan via hydrophobic interactions owing to the unique molecular structure of sophorolipids attributed by a bulky sugar moiety and a carboxyl functional group. These results demonstrated unique performances of sophorolipids on β-glucan and provided more insights on the efficacy of sophorolipids as good anti-biofilms.
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Affiliation(s)
- Hiroaki Kaga
- Department of Pure and Applied Chemistry, Faculty of Science and Technology, Tokyo University of Science
- Research & Innovation Center, Nihon L'Oréal K.K
| | | | - Koji Endo
- Research & Innovation Center, Nihon L'Oréal K.K
| | - Masaaki Akamatsu
- Department of Chemistry and Biotechnology, Faculty of Engineering, Tottori University
| | - Kenichi Sakai
- Department of Pure and Applied Chemistry, Faculty of Science and Technology, Tokyo University of Science
- Research Institute for Science and Technology, Tokyo University of Science
| | - Hideki Sakai
- Department of Pure and Applied Chemistry, Faculty of Science and Technology, Tokyo University of Science
- Research Institute for Science and Technology, Tokyo University of Science
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4
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Kadiri A, Fergoug T, Sebakhy KO, Bouhadda Y, Aribi R, Yssaad F, Daikh Z, El Hariri El Nokab M, Van Steenberge PHM. Insights into the Characterization of the Self-Assembly of Different Types of Amphiphilic Molecules Using Dynamic Light Scattering. ACS OMEGA 2023; 8:47714-47722. [PMID: 38144148 PMCID: PMC10734291 DOI: 10.1021/acsomega.3c05956] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/12/2023] [Revised: 10/02/2023] [Accepted: 10/26/2023] [Indexed: 12/26/2023]
Abstract
The self-assembly of cetyltrimethylammonium bromide, sodium dodecylsulfate, Triton X-100, and sulfobetaine surfactants in aqueous solutions was examined by dynamic light scattering, both in the presence and absence of 0.1 M NaCl salt, across various temperatures. For each surfactant, critical parameters, such as concentration and phase transition temperatures, of micelles were determined by monitoring changes in the hydrodynamic diameter with concentration and temperature. Additionally, we explored the self-assembly behavior of these surfactants when they are introduced alongside polystyrene nanoparticles. Our findings enabled the elucidation of surfactant molecule adsorption mechanisms onto polystyrene nanoparticle surfaces. Furthermore, by analyzing variations in the z-average diameter and zeta potential, we were able to establish the Krafft point, a parameter that remains imperceptible when polystyrene nanoparticles are absent from the solution.
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Affiliation(s)
- Aicha Kadiri
- Laboratory
of Physical Chemistry of Macromolecules and Biological Interfaces, Mustapha Stambouli University, Mascara 29000, Algeria
| | - Teffaha Fergoug
- Laboratory
of Physical Chemistry of Macromolecules and Biological Interfaces, Mustapha Stambouli University, Mascara 29000, Algeria
| | - Khaled O. Sebakhy
- Department
of Materials, Textiles and Chemical Engineering, Laboratory for Chemical
Technology (LCT), University of Gent, Technologiepark 125, Zwijnaarde 9052, Belgium
| | - Youcef Bouhadda
- Laboratory
of Physical Chemistry of Macromolecules and Biological Interfaces, Mustapha Stambouli University, Mascara 29000, Algeria
| | - Rachida Aribi
- Laboratory
of Physical Chemistry of Macromolecules and Biological Interfaces, Mustapha Stambouli University, Mascara 29000, Algeria
| | - Fatima Yssaad
- Laboratory
of Physical Chemistry of Macromolecules and Biological Interfaces, Mustapha Stambouli University, Mascara 29000, Algeria
| | - Zineeddine Daikh
- Laboratory
of Physical Chemistry of Macromolecules and Biological Interfaces, Mustapha Stambouli University, Mascara 29000, Algeria
| | - Mustapha El Hariri El Nokab
- Zernike
Institute for Advanced Materials (ZIAM), University of Groningen, Nijenborgh 4, Groningen 9700, The Netherlands
| | - Paul H. M. Van Steenberge
- Department
of Materials, Textiles and Chemical Engineering, Laboratory for Chemical
Technology (LCT), University of Gent, Technologiepark 125, Zwijnaarde 9052, Belgium
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5
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Bhattarai A, Das B. Viscosity of Sodium Polystyrenesulfonate with Cetyltrimethylammonium Bromide in the Mixture of Methanol and Water. J Phys Chem B 2023; 127:7048-7053. [PMID: 37505907 DOI: 10.1021/acs.jpcb.3c02565] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/30/2023]
Abstract
Viscosity of cetyltrimethylammonium bromide (CTAB) in the presence of sodium polystyrene sulfonate (NaPSS) in methanol-water mixed solvent media has been reported at 308.15 K. The results have been analyzed on the basis of a simple model based on the scaling theory of the viscosity of polyelectrolyte solutions put forward by Plucktaveesak et al. (J. Phys. Chem. B, 2003, 107, 8166-8171). The specific viscosity data obtained here for the CTAB-NaPSS couple in mixed solvent media agree very well with the predictions of the above model. It has been established that the fraction of free counterions of the polyelectrolyte can be conveniently recovered in these complex fluids.
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Affiliation(s)
- Ajaya Bhattarai
- Department of Chemistry, University of North Bengal, Darjeeling, West Bengal, 734013, India
- Department of Chemistry, Mahendra Morang Adarsh Multiple Campus, Tribhuvan University, Biratnagar 56613, Nepal
| | - Bijan Das
- Department of Chemistry, University of North Bengal, Darjeeling, West Bengal, 734013, India
- Department of Chemistry, Presidency University, Kolkata, West Bengal, 700073, India
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6
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Furikado I, Habe T, Inoue S, Tanaka M. Thermodynamics and Viscoelastic Property of Interface Unravel Combined Functions of Cationic Surfactant and Aromatic Alcohol against Gram-Negative Bacteria. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023. [PMID: 37289662 DOI: 10.1021/acs.langmuir.3c00862] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Lipopolysaccharides (LPSs), the major constituents of the outer membranes of Gram-negative bacteria, play a key role in protecting bacteria against antibiotics and antibacterial agents. In this study, we investigated how a mixture of cationic surfactants and aromatic alcohols, the base materials of widely used sanitizers, synergistically act on LPSs purified from Escherichia coli using isothermal titration calorimetry (ITC), surface tension measurements, and quartz crystal microbalance with dissipation (QCM-D). ITC data measured in the absence of Ca2+ ions showed the coexistence of exothermic and endothermic processes. The exotherm can be interpreted as the electrostatic binding of the cationic surfactant to the negatively charged LPS membrane surface, whereas the endotherm indicates the hydrophobic interaction between the hydrocarbon chains of the surfactants and LPSs. In the presence of Ca2+ ions, only an exothermic reaction was observed by ITC, and no entropically driven endotherm could be detected. Surface tension experiments further revealed that the co-adsorption of surfactants and LPS was synergistic, while that of surfactants and alcohol was negatively synergistic. Moreover, the QCM-D data indicated that the LPS membrane remained intact when the alcohol alone was added to the system. Intriguingly, the LPS membrane became highly susceptible to the combination of cationic surfactants and aromatic alcohols in the absence of Ca2+ ions. The obtained data provide thermodynamic and mechanical insights into the synergistic function of surfactants and alcohols in sanitation, which will enable the identification of the optimal combination of small molecules for a high hygiene level for the post-pandemic society.
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Affiliation(s)
- Ippei Furikado
- Analytical Science Research Laboratories, Kao Corporation, 1334, Minato, Wakayama-shi, Wakayama 640-8580, Japan
| | - Taichi Habe
- Analytical Science Research Laboratories, Kao Corporation, 1334, Minato, Wakayama-shi, Wakayama 640-8580, Japan
| | - Shigeto Inoue
- Analytical Science Research Laboratories, Kao Corporation, 1334, Minato, Wakayama-shi, Wakayama 640-8580, Japan
| | - Motomu Tanaka
- Physical Chemistry of Biosystems, Institute of Physical Chemistry, Heidelberg University, Heidelberg 69120, Germany
- Center for Integrative Medicine and Physics, Institute for Advanced Study, Kyoto University, Kyoto 606-8501, Japan
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7
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Xu C, Martínez Narváez CDV, Kotwis P, Sharma V. Polymer-Surfactant Complexes Impact the Stratification and Nanotopography of Micellar Foam Films. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023; 39:5761-5770. [PMID: 37040267 DOI: 10.1021/acs.langmuir.3c00024] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/19/2023]
Abstract
Freestanding films of soft matter drain via stratification due to confinement-induced structuring and layering of supramolecular structures such as micelles. Neutral polymers, added as rheology modifiers to cosmetics, foods, pharmaceuticals, and petrochemical formulations, often interact with monomers and micelles of surfactants, forming polymer-surfactant complexes. Despite many studies that explore interfacial and bulk rheological properties, the corresponding influence of polymer-surfactant complexes on foam drainage and lifetime is not well understood and motivates this study. Here, we report the discovery and evidence of drainage via stratification in foam films formed with polymer-surfactant (PEO-SDS) complexes. We show that the stratification trifecta of coexisting thick-thin regions, stepwise thinning, and nanoscopic topological features such as nanoridges and mesas can be observed using IDIOM (interferometry, digital imaging, and optical microscopy) protocols we developed for nanoscopic thickness mapping. We determine that for polymer concentrations below overlap concentration and surfactant concentrations beyond the excess micelle point, polymer-surfactant complexation impact the nanoscopic topography but not the step size, implying the amplitude of disjoining pressure changes, but periodicity remains unchanged.
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Affiliation(s)
- Chenxian Xu
- Department of Chemical Engineering, University of Illinois Chicago, 929 W. Taylor Street, Chicago, Illinois 60607, United States
| | - Carina D V Martínez Narváez
- Department of Chemical Engineering, University of Illinois Chicago, 929 W. Taylor Street, Chicago, Illinois 60607, United States
| | - Patrycja Kotwis
- Department of Chemical Engineering, University of Illinois Chicago, 929 W. Taylor Street, Chicago, Illinois 60607, United States
| | - Vivek Sharma
- Department of Chemical Engineering, University of Illinois Chicago, 929 W. Taylor Street, Chicago, Illinois 60607, United States
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8
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Costa C, Viana A, Oliveira IS, Marques EF. Interactions between Ionic Cellulose Derivatives Recycled from Textile Wastes and Surfactants: Interfacial, Aggregation and Wettability Studies. Molecules 2023; 28:molecules28083454. [PMID: 37110688 PMCID: PMC10144465 DOI: 10.3390/molecules28083454] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2023] [Revised: 04/05/2023] [Accepted: 04/06/2023] [Indexed: 04/29/2023] Open
Abstract
Interactions between polymers (P) and surfactants (S) in aqueous solution lead to interfacial and aggregation phenomena that are not only of great interest in physical chemistry but also important for many industrial applications, such as the development of detergents and fabric softeners. Here, we synthesized two ionic derivatives-sodium carboxymethylcellulose (NaCMC) and quaternized cellulose (QC)-from cellulose recycled from textile wastes and then explored the interactions of these polymers with assorted surfactants-cationic (CTAB, gemini), anionic (SDS, SDBS) and nonionic (TX-100)-commonly used in the textile industry. We obtained surface tension curves of the P/S mixtures by fixing the polymer concentration and then increasing the surfactant concentration. In mixtures where polymer and surfactant are oppositely charged (P-/S+ and P+/S-), a strong association is observed, and from the surface tension curves, we determined the critical aggregation concentration (cac) and critical micelle concentration in the presence of polymer (cmcp). For mixtures of similar charge (P+/S+ and P-/S-), virtually no interactions are observed, with the notable exception of the QC/CTAB system, which is much more surface active than the neat CTAB. We further investigated the effect of oppositely charged P/S mixtures on hydrophilicity by measuring the contact angles of aqueous droplets on a hydrophobic textile substrate. Significantly, both P-/S+ and P+/S- systems greatly enhance the hydrophilicity of the substrate at much lower surfactant concentrations than the surfactant alone (in particular in the QC/SDBS and QC/SDS systems).
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Affiliation(s)
- Catarina Costa
- CIQUP, IMS (Institute for Molecular Sciences), Departamento de Química e Bioquímica, Faculdade de Ciências, Universidade do Porto, Rua do Campo Alegre s/n, 4169-007 Porto, Portugal
- CeNTI-Centre for Nanotechnology and Smart Materials, Rua Fernando Mesquita, 4760-034 Vila Nova de Famalicão, Portugal
| | - André Viana
- CIQUP, IMS (Institute for Molecular Sciences), Departamento de Química e Bioquímica, Faculdade de Ciências, Universidade do Porto, Rua do Campo Alegre s/n, 4169-007 Porto, Portugal
- CeNTI-Centre for Nanotechnology and Smart Materials, Rua Fernando Mesquita, 4760-034 Vila Nova de Famalicão, Portugal
| | - Isabel S Oliveira
- CIQUP, IMS (Institute for Molecular Sciences), Departamento de Química e Bioquímica, Faculdade de Ciências, Universidade do Porto, Rua do Campo Alegre s/n, 4169-007 Porto, Portugal
| | - Eduardo F Marques
- CIQUP, IMS (Institute for Molecular Sciences), Departamento de Química e Bioquímica, Faculdade de Ciências, Universidade do Porto, Rua do Campo Alegre s/n, 4169-007 Porto, Portugal
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9
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Chauhan S, Manish. Temperature dependent micellization behavior of as synthesized anionic SAILs in aqueous nonionic polymer solutions: conductivity, UV-visible probe and antimicrobial studies. J DISPER SCI TECHNOL 2023. [DOI: 10.1080/01932691.2023.2188924] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/19/2023]
Affiliation(s)
| | - Manish
- Department of Chemistry, H. P. University, Shimla, India
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10
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Mondal S, Pyne S, Pyne P, Patra A, Mitra RK, Ghosh S. Interfacial Structure and Electrostatics Related to Solute Activity in a Model Anionic-Surfactant/Polymer Self-Assembly. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023; 39:2850-2858. [PMID: 36758211 DOI: 10.1021/acs.langmuir.2c03447] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
Polymer/surfactant composites are used in industry as an excipient for water-insoluble solutes. Such enhanced dissolution ability of composite media is related to the spontaneous formation of pre-micellar polymer surfactant aggregates (PS) at a magnitude of order lower than the surfactant critical micelle concentration in water. Combining electrochemical and spectroscopic studies, we investigate the microscopic interfacial structure (i.e., interface electrostatics and surface polarity) of PS formed in composite media. We establish that in a composite system, a mere change in the polymer concentration at a fixed surfactant concentration makes possible to regulate the counter-ion binding ability, surface potential, surface charge density, packing and surface polarity of the PS interface. Our study shows that the higher dissolution of water-insoluble nonionic solutes in composite media is driven by the depressing of surface charge density and polarity of the PS interface. A similar modulation of the PS interface acts as a barrier for the passive relocation of water-soluble charged solutes into the PS pseudo-phase. The time-resolved fluorescence anisotropy study allows us to underline the effect of surface charge modulation on the dynamical aspects of solutes at the PS interface.
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Affiliation(s)
- Sonali Mondal
- Centre for Surface Science, Physical Chemistry Section, Department of Chemistry, Jadavpur University, Kolkata 700032, India
| | - Sumana Pyne
- Department of Chemical and Biological Sciences, S. N. Bose National Centre for Basic Sciences, Salt Lake, Kolkata 700106, India
| | - Partha Pyne
- Department of Chemical and Biological Sciences, S. N. Bose National Centre for Basic Sciences, Salt Lake, Kolkata 700106, India
| | - Animesh Patra
- Department of Chemical and Biological Sciences, S. N. Bose National Centre for Basic Sciences, Salt Lake, Kolkata 700106, India
| | - Rajib Kumar Mitra
- Department of Chemical and Biological Sciences, S. N. Bose National Centre for Basic Sciences, Salt Lake, Kolkata 700106, India
| | - Soumen Ghosh
- Centre for Surface Science, Physical Chemistry Section, Department of Chemistry, Jadavpur University, Kolkata 700032, India
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11
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Rehman N, Ul Haq MI, Ullah H, Sadiq M, Abbas khan, Mian IU. Effect of polylactic acid on the micellization of SDS and CTAB: physicochemical studies on surfactants aggregation. Z PHYS CHEM 2023. [DOI: 10.1515/zpch-2022-0145] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Abstract
This study reports the aggregation behavior of polylactic acid (PLA) with ionic surfactants e.g. sodium dodecyl sulphate (SDS) and hexadecyltrimethylammonium bromide (CTAB) at different temperatures. Surface tension and conductivity techniques were used to investigate these physicochemical properties. Surface tension measurements were carried out to find out critical micelle concentration (CMC), free energy change of micellization (ΔG
m), free energy change of adsorption (ΔG
ads) and surface excess concentration (Γ). Conductivity measurements were used to determine CMC, degree of ionization (α) and degree of counter ion binding (β). The values of α and β obtained for SDS were (0.389 and 0.611 respectively), while for CTAB the values of α and β were (0.239 and 0.761 respectively). This type of electrostatic interactions is very important which can be applied in various industrial applications (e.g. pharmaceutical, industrial foaming, oil recovery etc.).
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Affiliation(s)
- Noor Rehman
- Department of Chemistry , Shaheed Banazir Bhutto University , (18000) Sheringal , Dir (Upper) , Khyber Pakhtunkhwa , Pakistan
| | - Muhammad Irshad Ul Haq
- Department of Chemistry , Shaheed Banazir Bhutto University , (18000) Sheringal , Dir (Upper) , Khyber Pakhtunkhwa , Pakistan
| | - Hidayat Ullah
- Department of Chemistry , Shaheed Banazir Bhutto University , (18000) Sheringal , Dir (Upper) , Khyber Pakhtunkhwa , Pakistan
| | - Muhammad Sadiq
- Department of Chemistry , University of Malakand , 18800 , Lower Dir , Khyber Pakhtunkhwa , Pakistan
| | - Abbas khan
- Department of Chemistry , Abdul Wali Khan Uiversity , Mardan , Khyber Pakhtunkhwa , Pakistan
| | - Inam Ullah Mian
- Department of Chemistry , University of Malakand , 18800 , Lower Dir , Khyber Pakhtunkhwa , Pakistan
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12
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Kim J, Lee YJ, Ku KH, Kim BJ. Effect of Molecular Structure of Photoswitchable Surfactant on Light-Responsive Shape Transition of Block Copolymer Particles. Macromolecules 2022. [DOI: 10.1021/acs.macromol.2c01465] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jinwoo Kim
- Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea
| | - Young Jun Lee
- Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea
| | - Kang Hee Ku
- School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of Korea
| | - Bumjoon J. Kim
- Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea
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13
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Numin MS, Hassan A, Jumbri K, Ramli A, Borhan N. Interfacial tension reduction mechanism by alkaline-surfactant-polymer at oil-water interface from experimental and molecular dynamics approaches. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.119006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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14
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Braun L, Uhlig M, Löhmann O, Campbell RA, Schneck E, von Klitzing R. Insights into Extended Structures and Their Driving Force: Influence of Salt on Polyelectrolyte/Surfactant Mixtures at the Air/Water Interface. ACS APPLIED MATERIALS & INTERFACES 2022; 14:27347-27359. [PMID: 35639454 DOI: 10.1021/acsami.2c04421] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
This paper addresses the effect of polyelectrolyte stiffness on the surface structure of polyelectrolyte (P)/surfactant (S) mixtures. Therefore, two different anionic Ps with different intrinsic persistence length lP are studied while varying the salt concentration (0-10-2 M). Either monosulfonated polyphenylene sulfone (sPSO2-220, lP ∼20 nm) or sodium poly(styrenesulfonate) (PSS, lP ∼1 nm) is mixed with the cationic surfactant tetradecyltrimethylammonium bromide (C14TAB) well below its critical micelle concentration and studied with tensiometry and neutron reflectivity experiments. We kept the S concentration (10-4 M) constant, while we varied the P concentration (10-5-10-3 M of the monomer, denoted as monoM). P and S adsorb at the air/water interface for all studied mixtures. Around the bulk stoichiometric mixing point (BSMP), PSS/C14TAB mixtures lose their surface activity, whereas sPSO2-220/C14TAB mixtures form extended structures perpendicular to the surface (meaning a layer of S with attached P and additional layers of P and S underneath instead of only a monolayer of S with P). Considering the different P monomer structures as well as the impact of salt, we identified the driving force for the formation of these extended structures: compensation of all interfacial charges (P/S ratio ∼1) to maximize the gain of entropy. By increasing the flexibility of P, we can tune the interfacial structures from extended structures to monolayers. These findings may help improve applications based on the adsorption of P/S mixtures in the fields of cosmetic or oil recovery.
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Affiliation(s)
- Larissa Braun
- Soft Matter at Interfaces, Department of Physics, Technische Universität Darmstadt, Hochschulstraße 8, 64289 Darmstadt, Germany
| | - Martin Uhlig
- Deutsches Elektronen-Synchrotron DESY, Notkestraße 85, 22607 Hamburg, Germany
| | - Oliver Löhmann
- Soft Matter at Interfaces, Department of Physics, Technische Universität Darmstadt, Hochschulstraße 8, 64289 Darmstadt, Germany
| | | | - Emanuel Schneck
- Soft Matter Biophysics, Department of Physics, Technische Universität Darmstadt, Hochschulstraße 8, 64289 Darmstadt, Germany
| | - Regine von Klitzing
- Soft Matter at Interfaces, Department of Physics, Technische Universität Darmstadt, Hochschulstraße 8, 64289 Darmstadt, Germany
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15
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Godek E, Grządka E, Maciołek U. Comparison of the influence of cationic polysaccharides on the stability properties of montmorillonite suspensions in the presence of sodium dodecyl sulphate. Carbohydr Polym 2022; 278:118985. [PMID: 34973792 DOI: 10.1016/j.carbpol.2021.118985] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2021] [Revised: 11/17/2021] [Accepted: 12/02/2021] [Indexed: 12/01/2022]
Abstract
The mixtures of cationic cellulose (CC) or cationic guar gum (CGG) with the anionic sodium dodecyl sulfate surfactant (SDS) were used as stabilizers for the aqueous suspensions of montmorillonite (Mt). The stabilization processes and the stabilization mechanism were investigated using the UV-VIS. The obtained results show that both polysaccharides can be used as stabilizers of the water suspensions of montmorillonite due to the effective adsorption of CC and CGG with or without SDS on the Mt. surface. To obtain complete information on the studied systems, the additional measurements of the surface tension, zeta potential, FT-IR, XRD and SEM were made. The results prove that the intermolecular complexes formed between the polysaccharides and SDS can adsorb on the Mt. surface, change the structure of the electrical double layer and the stability properties of the studied suspensions.
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Affiliation(s)
- E Godek
- Department of Radiochemistry and Environmental Chemistry, Faculty of Chemistry, Institute of Chemical Sciences, Maria Curie-Skłodowska University, M. Skłodowskiej - Curie 3 Sq., 20-031 Lublin, Poland.
| | - E Grządka
- Department of Radiochemistry and Environmental Chemistry, Faculty of Chemistry, Institute of Chemical Sciences, Maria Curie-Skłodowska University, M. Skłodowskiej - Curie 3 Sq., 20-031 Lublin, Poland.
| | - U Maciołek
- Analytical Laboratory, Faculty of Chemistry, Institute of Chemical Sciences, Maria Curie-Skłodowska University, M. Skłodowskiej - Curie 3 Sq., 20-031 Lublin, Poland.
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16
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Polymer/surfactant mixtures as dispersants and non-covalent functionalization agents of multiwalled carbon nanotubes: Synergism, morphological characterization and molecular picture. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2021.118338] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
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17
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Schnurbus M, Hardt M, Steinforth P, Carrascosa-Tejedor J, Winnall S, Gutfreund P, Schönhoff M, Campbell RA, Braunschweig B. Responsive Material and Interfacial Properties through Remote Control of Polyelectrolyte-Surfactant Mixtures. ACS APPLIED MATERIALS & INTERFACES 2022; 14:4656-4667. [PMID: 35029383 DOI: 10.1021/acsami.1c18934] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
Polyelectrolyte/surfactant (P/S) mixtures find many applications but are static in nature and cannot be reversibly reconfigured through the application of external stimuli. Using a new type of photoswitchable surfactants, we use light to trigger property changes in mixtures of an anionic polyelectrolyte with a cationic photoswitch such as electrophoretic mobilities, particle size, as well as their interfacial structure and their ability to stabilize aqueous foam. For that, we show that prevailing hydrophobic intermolecular interactions can be remotely controlled between poly(sodium styrene sulfonate) (PSS) and arylazopyrazole tetraethylammonium bromide (AAP-TB). Shifting the chemical potential for P/S binding with E/Z photoisomerization of the surfactants can reversibly disintegrate even large aggregates (>4 μm) and is accompanied by a substantial change in the net charging state of PSS/AAP-TB complexes, e.g., from negative to positive excess charges upon light irradiation. In addition to the drastic changes in the bulk solution, also at air-water interfaces, the interfacial stoichiometry and structure change drastically on the molecular level with E/Z photoisomerization, which can also drive the stability of aqueous foam on a macroscopic level.
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Affiliation(s)
- Marco Schnurbus
- Institute of Physical Chemistry and Center of Soft Nanoscience, Westfälische Wilhelms-Universität Münster, Corrensstraße 28/30, 48149 Münster, Germany
| | - Michael Hardt
- Institute of Physical Chemistry and Center of Soft Nanoscience, Westfälische Wilhelms-Universität Münster, Corrensstraße 28/30, 48149 Münster, Germany
| | - Pascal Steinforth
- Institute of Physical Chemistry and Center of Soft Nanoscience, Westfälische Wilhelms-Universität Münster, Corrensstraße 28/30, 48149 Münster, Germany
| | - Javier Carrascosa-Tejedor
- Institut Laue-Langevin, 71 Avenue des Martyrs, CS 20156, 38042 Grenoble Cedex 9, France
- Division of Pharmacy & Optometry, University of Manchester, M13 9PT Manchester, United Kingdom
| | - Samuel Winnall
- Institut Laue-Langevin, 71 Avenue des Martyrs, CS 20156, 38042 Grenoble Cedex 9, France
- Division of Pharmacy & Optometry, University of Manchester, M13 9PT Manchester, United Kingdom
| | - Philipp Gutfreund
- Institut Laue-Langevin, 71 Avenue des Martyrs, CS 20156, 38042 Grenoble Cedex 9, France
| | - Monika Schönhoff
- Institute of Physical Chemistry and Center of Soft Nanoscience, Westfälische Wilhelms-Universität Münster, Corrensstraße 28/30, 48149 Münster, Germany
| | - Richard A Campbell
- Division of Pharmacy & Optometry, University of Manchester, M13 9PT Manchester, United Kingdom
| | - Björn Braunschweig
- Institute of Physical Chemistry and Center of Soft Nanoscience, Westfälische Wilhelms-Universität Münster, Corrensstraße 28/30, 48149 Münster, Germany
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18
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The effect of mixed sodium dodecyl sulfate–polyethylene glycol systems on kinetic of oxidation of o-Cresol by cerium(IV) in H2SO4 medium. Colloid Polym Sci 2022. [DOI: 10.1007/s00396-022-04940-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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19
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Yang X, Zhong Z, Zhou S, Gu P, Xu Q, Lu JM. Tuning the Stability of Liquids by Controlling the Formation of Interfacial Surfactants. NEW J CHEM 2022. [DOI: 10.1039/d2nj03101a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Currently, the stability of liquids by nanoparticle surfactants is widely investigated, while the stability of liquids by supramolecular polymer surfactants is rarely involved. Herein, we combine small organic molecules dissolved...
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20
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Milanović M, Ćirin D, Krstonošić V. The interactions in ternary system made of xanthan gum, Carbopol 940 and anionic/nonionic surfactant. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.117696] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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21
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Abdulbari HA, Amir R. Drag Reduction Performance and Stability of an Organic Polymer, Surfactant, and Their Complexes. Chem Eng Technol 2021. [DOI: 10.1002/ceat.202100073] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Hayder A. Abdulbari
- University Malaysia Pahang Department of Chemical Engineering College of Engineering Lebuhraya Tun Razak 26300 Gambang Kuantan, Pahang Malaysia
- University Malaysia Pahang Centre of Excellence for Advanced Research in Fluid Flow Lebuhraya Tun Razak 26300 Gambang Kuantan, Pahang Malaysia
| | - Rasidah Amir
- University Malaysia Pahang Faculty of Chemical & Process Engineering Technology Lebuhraya Tun Razak 26300 Gambang Kuantan, Pahang Malaysia
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22
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pH-switchable pickering emulsions stabilized by polyelectrolyte-biosurfactant complex coacervate colloids. J Colloid Interface Sci 2021; 600:23-36. [DOI: 10.1016/j.jcis.2021.04.135] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2021] [Revised: 04/25/2021] [Accepted: 04/26/2021] [Indexed: 02/06/2023]
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23
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Saha D, Ray D, Kumar S, Kohlbrecher J, Aswal VK. Interaction of a bovine serum albumin (BSA) protein with mixed anionic-cationic surfactants and the resultant structure. SOFT MATTER 2021; 17:6972-6984. [PMID: 34236073 DOI: 10.1039/d1sm00264c] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
The interaction of a bovine serum albumin (BSA) protein with the mixture of anionic sodium dodecyl sulfate (SDS) and cationic dodecyltrimethylammonium bromide (DTAB) has been investigated by small-angle neutron scattering (SANS) and dynamic light scattering (DLS). Both SDS and DTAB as individuals interact electrostatically as well as hydrophobically with BSA and form connected protein-decorated micelle like complexes in the aqueous solution, in which the well-defined surfactant micelles are organized along the randomly distributed unfolded polypeptide chain of the protein. The protein-surfactant interaction has been tuned by adding different molar mixtures of SDS and DTAB in BSA aqueous solution. It is found that a lower molar fraction of either surfactant in the protein-mixed surfactant complexes results in the formation of a connected protein-decorated micelle structure similar to those of pure surfactants. As the molar fraction of one of the surfactants in the mixture approaches the equimolar fraction, the structure formed by the protein-mixed surfactant is very different from the connected protein-decorated micelle like structure. Different microstructures of BSA-mixed surfactant complexes are formed, mostly governed by the structure of mixed surfactants arising from the strong electrostatic interaction of oppositely charged components. In this case, unfolded proteins wrap the structures of mixed surfactants around their surface. Along with the connected protein-decorated micelle like structure, rod-like and bilayer vesicles of protein-surfactant complexes are formed at different molar fractions of mixed surfactants.
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Affiliation(s)
- Debasish Saha
- Solid State Physics Division, Bhabha Atomic Research Centre, Mumbai 400 085, India.
| | - Debes Ray
- Solid State Physics Division, Bhabha Atomic Research Centre, Mumbai 400 085, India.
| | - Sugam Kumar
- Solid State Physics Division, Bhabha Atomic Research Centre, Mumbai 400 085, India.
| | - Joachim Kohlbrecher
- Laboratory for Neutron Scattering and Imaging, Paul Scherrer Institut, CH-5232 PSI Villigen, Switzerland
| | - Vinod K Aswal
- Solid State Physics Division, Bhabha Atomic Research Centre, Mumbai 400 085, India. and Homi Bhabha National Institute, Mumbai 400 094, India
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24
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Gore S, Rane K. Using Molecular Simulations to Understand the Effect of Dodecyl Sulfate on the Calcium-Binding Ability of Polystyrene Sulfonate. J Phys Chem B 2021; 125:7919-7931. [PMID: 34232049 DOI: 10.1021/acs.jpcb.1c04607] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We demonstrate the potential to tune the binding of calcium ions with polystyrene sulfonate (PSS) in the presence of dodecyl sulfate (DS). This can aid the design of surfactant-responsive water-softening agents for applications in detergency. We use molecular dynamics simulations to study the effect of the concentration of DS ions and the degree of sulfonation on the propensity of calcium ions toward PSS. We observe that the presence of DS ions increases the propensity of calcium ions toward 100% sulfonated PSS. The above phenomenon is due to the hydrophobic attraction between PSS and DS at low DS concentrations and the formation of calcium ion bridges between sulfonate and sulfate groups at moderate to high DS concentrations. We also observe the formation of calcium ion bridges between the sulfonate groups at high DS concentrations. The presence of DS ions also increases the propensity of calcium ions toward 20% sulfonated PSS. This is mainly due to the hydrophobic attraction between PSS and DS ions. The calcium ion bridges between sulfonate and sulfate groups are less prevalent than those of 100% sulfonated PSS. We do not observe calcium ion bridges between sulfonate groups of 20% sulfonated PSS. We use the above-mentioned insights to suggest potential strategies for designing an anionic polyelectrolyte having a suitable calcium-binding ability at a given concentration of the anionic surfactant. Finally, strong PSS-DS affinity is detrimental to the activity of surfactants because less surfactant ions are available for detergency. Our results also indicate the possibility of altering the PSS-DS affinity by changing the degree of sulfonation.
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Affiliation(s)
- Sonali Gore
- Chemical Engineering, IIT Gandhinagar, Palaj, Gujarat 382355, India
| | - Kaustubh Rane
- Chemical Engineering, IIT Gandhinagar, Palaj, Gujarat 382355, India
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25
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Martínez Narváez CDV, Mazur T, Sharma V. Dynamics and extensional rheology of polymer-surfactant association complexes. SOFT MATTER 2021; 17:6116-6126. [PMID: 34076659 DOI: 10.1039/d1sm00335f] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Understanding and characterizing the influence of polymers and surfactants on rheology, application, and processing is critical for designing complex fluid formulations for enhanced oil recovery, pharmaceuticals, cosmetics, foods, inks, agricultural sprays, and coatings. It is well-established that the addition of anionic surfactant like sodium dodecyl sulfate (SDS) to an aqueous solution of an oppositely-charged or uncharged polymer like poly(ethylene oxide) (PEO) can result in the formation of the polymer-surfactant association complexes (P0S-ACs) and a non-monotonic concentration-dependent variation in zero shear viscosity. However, the extensional rheology response of polymer-surfactant mixtures remains relatively poorly understood, partially due to characterization challenges that arise for low viscosity, low elasticity fluids, even though the response to strong extensional flows impacts drop formation and many processing operations. In this article, we use the recently developed dripping-onto-substrate (DoS) rheometry protocols to characterize the pinching dynamics and extensional rheology response of aqueous P0S- solutions formulated with PEO (P0) and SDS (S-), respectively. We find the PEO-SDS mixtures display a significantly weaker concentration-dependent variation in the extensional relaxation time, filament lifespan, and extensional viscosity values than anticipated by the measured shear viscosity.
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Affiliation(s)
| | - Thomas Mazur
- Chemical Engineering, University of Illinois at Chicago, 929 W. Taylor St, IL 60608, USA.
| | - Vivek Sharma
- Chemical Engineering, University of Illinois at Chicago, 929 W. Taylor St, IL 60608, USA.
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26
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Nechaev AI, Voronina NS, Valtsifer VA, Strelnikov VN. Stability of the dispersed system in inverse emulsion polymerization of ionic acrylate monomers. Colloid Polym Sci 2021. [DOI: 10.1007/s00396-021-04832-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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27
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Fernandes RN, Simiqueli AA, Vidigal MCTR, Minim VPR, Minim LA. Kinetic stability of the oil-in-water emulsions and dynamic interfacial properties of mixtures of sucrose esters and polysaccharides. Food Chem 2021; 357:129693. [PMID: 33882436 DOI: 10.1016/j.foodchem.2021.129693] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2020] [Revised: 03/16/2021] [Accepted: 03/20/2021] [Indexed: 10/21/2022]
Abstract
This article presents a study of the interfacial properties of oil-in-water emulsions containing sugar esters and polysaccharides. Sucrose fatty acid esters were synthesized using immobilized Candida antarctica lipase B. A yield of 53.4% was obtained using 2-methyl-2-butanol and 1:3 M ratio of sucrose:stearic acid. Equilibrium surface tension was 45 mN/m and low critical micellar concentration (CMC) value was obtained (ca. 10 mg/mL), characteristic of non-ionic surfactant. The interfacial properties of mixtures of sucrose esters and polysaccharides, at the oil-water interface were determined using a pendant drop tensiometer. Addition of polysaccharides increased the interfacial tension. Studies of interfacial viscoelasticity showed that the films were predominantly elastic. The presence of polysaccharides in emulsions resulted in flocculated droplets. All the emulsions presented great stability along 28 days with no creaming formation.
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Affiliation(s)
- Raquel Nunes Fernandes
- Food Technology Department, Federal University of Viçosa (UFV), P.H. Rolfs Avenue, Campus, 36570-900 Viçosa, MG, Brazil
| | - Andréa Alves Simiqueli
- Food Technology Department, Federal University of Viçosa (UFV), P.H. Rolfs Avenue, Campus, 36570-900 Viçosa, MG, Brazil
| | | | - Valéria Paula Rodrigues Minim
- Food Technology Department, Federal University of Viçosa (UFV), P.H. Rolfs Avenue, Campus, 36570-900 Viçosa, MG, Brazil
| | - Luis Antonio Minim
- Food Technology Department, Federal University of Viçosa (UFV), P.H. Rolfs Avenue, Campus, 36570-900 Viçosa, MG, Brazil.
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28
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Luengo GS, Fameau AL, Léonforte F, Greaves AJ. Surface science of cosmetic substrates, cleansing actives and formulations. Adv Colloid Interface Sci 2021; 290:102383. [PMID: 33690071 DOI: 10.1016/j.cis.2021.102383] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2020] [Revised: 02/04/2021] [Accepted: 02/06/2021] [Indexed: 12/22/2022]
Abstract
The development of shampoo and cleansing formulations in cosmetics is at a crossroads due to consumer demands for better performing, more natural products and also the strong commitment of cosmetic companies to improve the sustainability of cosmetic products. In order to go beyond traditional formulations, it is of great importance to clearly establish the science behind cleansing technologies and appreciate the specificity of cleansing biological surfaces such as hair and skin. In this review, we present recent advances in our knowledge of the physicochemical properties of the hair surface from both an experimental and a theoretical point of view. We discuss the opportunities and challenges that newer, sustainable formulations bring compared to petroleum-based ingredients. The inevitable evolution towards more bio-based, eco-friendly ingredients and sustainable formulations requires a complete rethink of many well-known physicochemical principles. The pivotal role of digital sciences and modelling in the understanding and conception of new ingredients and formulations is discussed. We describe recent numerical approaches that take into account the specificities of the hair surface in terms of structuration, different methods that study the adsorption of formulation ingredients and finally the success of new data-driven approaches. We conclude with practical examples on current formulation efforts incorporating bio-surfactants, controlling foaming and searching for new rheological properties.
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29
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Nishat A, Azum N, Asiri AM, Sardar N. Interactions between Anionic Polyacrylamide and Cationic Gemini/Conventional Surfactants. J SURFACTANTS DETERG 2021. [DOI: 10.1002/jsde.12508] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Afreen Nishat
- Department of Petroleum Studies Aligarh Muslim University Aligarh 202002 India
| | - Naved Azum
- Chemistry Department, Faculty of Science King Abdulaziz University Jeddah 21589 Saudi Arabia
| | - Abdullah M. Asiri
- Chemistry Department, Faculty of Science King Abdulaziz University Jeddah 21589 Saudi Arabia
- Center of Excellence for Advanced Materials Research King Abdulaziz University Jeddah 21589 Saudi Arabia
| | - Najam Sardar
- Department of Petroleum Studies Aligarh Muslim University Aligarh 202002 India
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30
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Benhur AM, Diaz J, Amin S. Impact of polyelectrolyte-surfactant interactions on the rheology and wet lubrication performance of conditioning shampoo. Int J Cosmet Sci 2021; 43:246-253. [PMID: 33480047 DOI: 10.1111/ics.12689] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2020] [Revised: 12/29/2020] [Accepted: 01/15/2021] [Indexed: 11/27/2022]
Abstract
OBJECTIVE The purpose of this study is to understand the impact of the cationic polymer merquat on the rheological behavior of the mixed surfactant system of sodium lauryl ether sulfate (SLES) and cocamidopropyl betaine (CapB) as well as the impact of varying formulation conditions on the wet lubrication performance of the SLES-CapB-Merquat system. METHODS Rotation mechanical Rheometry was used to study the rheological response of the SLES-CapB-Merquat systems. Frequency sweeps were conducted to analyze the rheological properties of the system at low frequency ranges and bulk viscosity of the system was studied at high shear rates at varying salt and polymer concentrations. Wet combing tests and hair friction tests were run on the Dia-stron MTT175 flexible miniature tensile tester in order to evaluate the conditioning effects of the different formulations. RESULTS The SLES-CapB system on its own exhibits very little viscosity. The bulk rheology results show that the addition of Merquat enhances the viscosity and viscoelastic properties of the SLES-CapB-Merquat system indicating the presence of electrostatic interactions between the surfactant and polyelectrolyte. Addition of salt had a significant impact on the system's rheological response due to the charge screening effect of salt. Wet combing force data indicate that the charged polyelectrolyte binds to the hair substrate resulting in reduced combing force values after the product was applied. The addition of silicone oil to the formulation seemed to greatly enhance the conditioning effect of the formulation. CONCLUSION The charge interactions between SLES, CapB and Merquat results in the formation of an integrated gel like network, thus building the viscosity of the system. Variation of parameters like polymer and salt concentration has the potential to modify the bulk rheological properties and consequently the wet lubrication properties of the system.
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Affiliation(s)
| | - Jangelis Diaz
- Chemical Engineering Department, Manhattan College, Riverdale, NY, USA
| | - Samiul Amin
- Chemical Engineering Department, Manhattan College, Riverdale, NY, USA
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31
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Del Sorbo GR, Cristiglio V, Clemens D, Hoffmann I, Schneck E. Influence of the Surfactant Tail Length on the Viscosity of Oppositely Charged Polyelectrolyte/Surfactant Complexes. Macromolecules 2021. [DOI: 10.1021/acs.macromol.0c02728] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Giuseppe Rosario Del Sorbo
- Max Planck Institute of Colloids and Interfaces, Am Mühlenberg 1, D-14476 Potsdam, Germany
- Institut Max von Laue-Paul Langevin (ILL), 71 avenue des Martyrs, CS 20156, F-38042 Grenoble Cedex 9, France
| | - Viviana Cristiglio
- Institut Max von Laue-Paul Langevin (ILL), 71 avenue des Martyrs, CS 20156, F-38042 Grenoble Cedex 9, France
| | - Daniel Clemens
- Helmholtz Zentrum Berlin, Hahn-Meitner Platz 1, D-14109 Berlin, Germany
| | - Ingo Hoffmann
- Institut Max von Laue-Paul Langevin (ILL), 71 avenue des Martyrs, CS 20156, F-38042 Grenoble Cedex 9, France
| | - Emanuel Schneck
- Department of Physics, Technische Universität Darmstadt, Hochschulstraße 8, D-64289 Darmstadt, Germany
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Budinčić JM, Petrović L, Đekić L, Fraj J, Bučko S, Katona J, Spasojević L. Study of vitamin E microencapsulation and controlled release from chitosan/sodium lauryl ether sulfate microcapsules. Carbohydr Polym 2021; 251:116988. [PMID: 33142560 DOI: 10.1016/j.carbpol.2020.116988] [Citation(s) in RCA: 32] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2020] [Revised: 08/17/2020] [Accepted: 08/21/2020] [Indexed: 11/17/2022]
Abstract
Potential benefit of microencapsulation is its ability to deliver and protect incorporated ingredients such as vitamin E. Microcapsule wall properties can be changed by adding of coss-linking agents that are usually considered toxic for application. The microcapsules were prepared by a spray-drying technique using coacervation method, by depositing the coacervate formed in the mixture of chitosan and sodium lauryl ether sulfate to the oil/water interface. All obtained microcapsules suspensions had slightly lower mean diameter compared to the starting emulsion (6.85 ± 0.213 μm), which shows their good stability during the drying process. The choice and absence of cross-linking agents had influence on kinetics of vitamin E release. Encapsulation efficiency of microcapsules without cross-linking agent was 73.17 ± 0.64 %. This study avoided the use of aldehydes as cross-linking agents and found that chitosan/SLES complex can be used as wall material for the microencapsulation of hydrophobic active molecules in cosmetic industry.
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Affiliation(s)
- Jelena Milinković Budinčić
- Faculty of Technology Novi Sad, University of Novi Sad, Department of Biotechnology and Pharmaceutical Engineering, Serbia.
| | - Lidija Petrović
- Faculty of Technology Novi Sad, University of Novi Sad, Department of Biotechnology and Pharmaceutical Engineering, Serbia
| | - Ljiljana Đekić
- Faculty of Pharmacy, University of Belgrade, Department of Pharmaceutical Technology and Cosmetology, Serbia
| | - Jadranka Fraj
- Faculty of Technology Novi Sad, University of Novi Sad, Department of Biotechnology and Pharmaceutical Engineering, Serbia
| | - Sandra Bučko
- Faculty of Technology Novi Sad, University of Novi Sad, Department of Biotechnology and Pharmaceutical Engineering, Serbia
| | - Jaroslav Katona
- Faculty of Technology Novi Sad, University of Novi Sad, Department of Biotechnology and Pharmaceutical Engineering, Serbia
| | - Ljiljana Spasojević
- Faculty of Technology Novi Sad, University of Novi Sad, Department of Biotechnology and Pharmaceutical Engineering, Serbia
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Oliveira IS, Silva JP, Araújo MJ, Gomes AC, Marques EF. Biocompatible thermosensitive nanostructures and hydrogels of an amino acid-derived surfactant and hydroxyethyl cellulose polymers. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2020.114540] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
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35
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Abstract
The traditional Enhanced Oil Recovery (EOR) processes allow improving the performance of mature oilfields after waterflooding projects. Chemical EOR processes modify different physical properties of the fluids and/or the rock in order to mobilize the oil that remains trapped. Furthermore, combined processes have been proposed to improve the performance, using the properties and synergy of the chemical agents. This paper presents a novel simulator developed for a combined surfactant/polymer flooding in EOR processes. It studies the flow of a two-phase, five-component system (aqueous and organic phases with water, petroleum, surfactant, polymer and salt) in porous media. Polymer and surfactant together affect each other’s interfacial and rheological properties as well as the adsorption rates. This is known in the industry as Surfactant-Polymer Interaction (SPI). The simulations showed that optimum results occur when both chemical agents are injected overlapped, with the polymer in the first place. This procedure decreases the surfactant’s adsorption rates, rendering higher recovery factors. The presence of the salt as fifth component slightly modifies the adsorption rates of both polymer and surfactant, but its influence on the phase behavior allows increasing the surfactant’s sweep efficiency.
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36
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Petropolis NP, Petropolis HM, MacNeil NE, Doucet TM, Marangoni DG. The Interaction of Glymes with Surfactant Micelles. J SURFACTANTS DETERG 2020. [DOI: 10.1002/jsde.12476] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
| | | | - Nicole E. MacNeil
- Department of Chemistry St. F.X. University Antigonish NS B2G 2W5 Canada
| | - Taylor M. Doucet
- Department of Chemistry St. F.X. University Antigonish NS B2G 2W5 Canada
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37
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Rheology of sphingans in EPS–surfactant systems. Carbohydr Polym 2020; 248:116778. [DOI: 10.1016/j.carbpol.2020.116778] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2020] [Revised: 06/27/2020] [Accepted: 07/13/2020] [Indexed: 01/02/2023]
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38
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Akanno A, Guzmán E, Ortega F, Rubio RG. Behavior of the water/vapor interface of chitosan solutions with an anionic surfactant: effect of polymer-surfactant interactions. Phys Chem Chem Phys 2020; 22:23360-23373. [PMID: 33047113 DOI: 10.1039/d0cp02470h] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
The adsorption of mixtures formed by chitosan and sodium lauryl ether sulfate (SLES) at the water/vapor interface has been studied on the basis of their impact on the equilibrium surface tension of the interface, and the response of such an interface to mechanical deformations. The analysis of the surfactant binding to the chitosan chains evidenced that the chitosan-SLES solutions were mixtures of polyelectrolyte-surfactant complexes and a non-negligible amount of free surfactant molecules. The interfacial properties showed two well-differentiated regions for interfacial adsorption as a function of the SLES concentration: (i) at a low surfactant concentration, co-adsorption of chitosan and SLES occurs, and (ii) at high concentrations, the surface is mostly occupied by SLES molecules. This behavior may be interpreted in terms of a complex equilibration mechanism of the interfacial layers, where different coupled dynamic processes may be involved. Furthermore, the use of the time-concentration superposition principle has confirmed the different dynamic behaviors of the chitosan-SLES adsorption as a function of the SLES concentration. This work sheds light on some of the most fundamental bases governing the physico-chemical behavior of mixtures formed by a biopolymer and a surfactant, where their complex behavior is governed by an intricate balance of bulk and interfacial interactions.
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Affiliation(s)
- Andrew Akanno
- Departamento de Química Física-Universidad Complutense de Madrid, Ciudad Universitaria s/n, 28040 Madrid, Spain.
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39
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Grządka E, Matusiak J, Godek E. Alginic acid as a stabilizer of zirconia suspensions in the presence of cationic surfactants. Carbohydr Polym 2020; 246:116634. [PMID: 32747269 DOI: 10.1016/j.carbpol.2020.116634] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2020] [Revised: 06/08/2020] [Accepted: 06/10/2020] [Indexed: 11/26/2022]
Abstract
The influence of hydrocarbon (CTAB), fluorocarbon (S-106-A) and silicone (C-Si) cationic surfactants: on stability, adsorption and electrokinetic properties of the alginic acid (AA)/zirconia (ZrO2) suspensions was studied. The results obtained from the spectrophotometric measurements indicate on very high effectiveness of the surfactants in stabilization of the studied systems. This is due to the formation of multimolecular complexes between alginic acid and the surfactants. The existence of these complexes was confirmed by the surface tension and the zeta potential measurements. Presented studies also enabled the estimation of the conditions under which the complexes are effectively created and the determination of their character. These findings were also confirmed by the adsorption data. Moreover, the surface charge density measurements proved that the adsorption of AA or the AA/surfactant complexes changes the structure of the electrical double layer. The presented results may find applications in the fields of functionalized materials.
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Affiliation(s)
- E Grządka
- Department of Radiochemistry and Environmental Chemistry, Faculty of Chemistry, Institute of Chemical Sciences, Maria Curie-Skłodowska University, M. Skłodowskiej - Curie 3 Sq., 20-031, Lublin, Poland.
| | - J Matusiak
- Department of Radiochemistry and Environmental Chemistry, Faculty of Chemistry, Institute of Chemical Sciences, Maria Curie-Skłodowska University, M. Skłodowskiej - Curie 3 Sq., 20-031, Lublin, Poland.
| | - E Godek
- Department of Radiochemistry and Environmental Chemistry, Faculty of Chemistry, Institute of Chemical Sciences, Maria Curie-Skłodowska University, M. Skłodowskiej - Curie 3 Sq., 20-031, Lublin, Poland.
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Lele BJ, Tilton RD. Depletion Forces Induced by Mixed Micelles of Nonionic Block Copolymers and Anionic Surfactants. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2020; 36:10772-10784. [PMID: 32830506 DOI: 10.1021/acs.langmuir.0c01574] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Depletion forces were measured between a silica sphere and a silica plate in solutions containing nonionic Pluronic P123 poly(ethylene oxide-b-propylene oxide-b-ethylene oxide) triblock copolymers and anionic sodium dodecyl sulfate (SDS) surfactants using colloidal probe atomic force microscopy. Prior research established synergistic depletion force enhancement in solutions containing SDS and unimeric Pluronic F108 block copolymers via formation of large pseudo-polyelectrolyte complexes. The current work addresses a more complex system where the polymer is above its critical micelle concentration, and surfactant binding alters not only the size and charge of the micelles but also the number of polymers per micelle. Force profiles were measured in 10 000 ppm P123 (1 wt %, corresponding to 1.72 mM based on average molar mass) solutions containing SDS at concentrations up to 64 mM and compared to micellar P123 solutions and to P123-free SDS solutions. Whereas force profiles in the SDS-free micellar P123 solutions were purely repulsive, P123/SDS complexation produced synergistic depletion force enhancement for SDS concentrations between 2 and 32 mM. The synergism that occurred within a finite SDS concentration range was explained by comparing the hydrodynamic size, molar mass, charge, and concentration of depletants in P123/SDS mixtures and their respective single-component solutions obtained with the aid of dynamic light scattering, static light scattering, and dodecyl sulfate ion-selective electrode measurements. These measurements showed that complexation produced effects that would be mutually counteracting with respect to depletion forces: decreasing the mixed micelle hydrodynamic diameter relative to SDS-free P123 micelles would tend to weaken depletion forces, while adding charge and decreasing the aggregation number of polymers per micelle (thereby increasing the number concentration of micellar depletants) would tend to strengthen depletion forces.
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Affiliation(s)
- Bhagyashree J Lele
- Department of Chemical Engineering, Center for Complex Fluids Engineering, Carnegie Mellon University, 5000 Forbes Avenue, Pittsburgh, Pennsylvania 15213, United States
| | - Robert D Tilton
- Department of Chemical Engineering, Center for Complex Fluids Engineering, Carnegie Mellon University, 5000 Forbes Avenue, Pittsburgh, Pennsylvania 15213, United States
- Department of Biomedical Engineering, Center for Complex Fluids Engineering, Carnegie Mellon University, 5000 Forbes Avenue, Pittsburgh, Pennsylvania 15213, United States
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Leermakers FAM, Léonforte F, Luengo GS. Structure and Colloidal Stability of Adsorption Layers of Macrocycle, Linear, Comb, Star, and Dendritic Macromolecules. Macromolecules 2020. [DOI: 10.1021/acs.macromol.0c00952] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Frans A. M. Leermakers
- Physical Chemistry and Soft Matter, Wageningen University, Stippeneng 4, 6708 WE Wageningen, The Netherlands
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Matusiak J, Grządka E, Kowalczuk A, Pietruszka R, Godlewski M. The influence of hydrocarbon, fluorinated and silicone surfactants on the adsorption, stability and electrokinetic properties of the κ-carrageenan/alumina system. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2020.113669] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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43
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Fernández-Peña L, Abelenda-Nuñez I, Hernández-Rivas M, Ortega F, Rubio RG, Guzmán E. Impact of the bulk aggregation on the adsorption of oppositely charged polyelectrolyte-surfactant mixtures onto solid surfaces. Adv Colloid Interface Sci 2020; 282:102203. [PMID: 32629241 DOI: 10.1016/j.cis.2020.102203] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2020] [Revised: 06/21/2020] [Accepted: 06/22/2020] [Indexed: 12/28/2022]
Abstract
The understanding of the deposition of oppositely charged polyelectrolytes-surfactant mixtures onto solid surfaces presents a high interest in current days due to the recognized impact of the obtained layers on different industrial sectors and the performance of several consumer products (e.g. formulations of shampoos and hair conditioners). This results from the broad range of structures and properties that can present the mixed layers, which in most of the cases mirror the association process occurring between the polyelectrolyte chains and the oppositely charged surfactants in the bulk. Therefore, the understanding of the adsorption processes and characteristics of the adsorbed layers can be only attained from a careful examination of the self-assembly processes occurring in the solution. This review aims to contribute to the understanding of the interaction of polyelectrolyte-surfactant mixtures with solid surfaces, which is probably one of the most underexplored aspects of these type of systems. For this purpose, a comprehensive discussion on the correlations between the aggregates formed in the solutions and the deposition of the obtained complexes upon such association onto solid surfaces will be presented. This makes it necessary to take a closer look to the most important forces driving such processes.
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Affiliation(s)
- Laura Fernández-Peña
- Departamento de Química Física, Universidad Complutense de Madrid, Ciudad Universitaria s/n, Madrid 28040, Spain; Centro de Espectroscopia Infrarroja-Raman-Correlación, Universidad Complutense de Madrid, Ciudad Universitaria, s/n, Madrid 28040, Spain.
| | - Irene Abelenda-Nuñez
- Departamento de Química Física, Universidad Complutense de Madrid, Ciudad Universitaria s/n, Madrid 28040, Spain
| | - María Hernández-Rivas
- Departamento de Química Física, Universidad Complutense de Madrid, Ciudad Universitaria s/n, Madrid 28040, Spain
| | - Francisco Ortega
- Departamento de Química Física, Universidad Complutense de Madrid, Ciudad Universitaria s/n, Madrid 28040, Spain; Instituto Pluridisciplinar, Universidad Complutense de Madrid, Paseo Juan XXIII 1, Madrid 28040, Spain
| | - Ramón G Rubio
- Departamento de Química Física, Universidad Complutense de Madrid, Ciudad Universitaria s/n, Madrid 28040, Spain; Instituto Pluridisciplinar, Universidad Complutense de Madrid, Paseo Juan XXIII 1, Madrid 28040, Spain
| | - Eduardo Guzmán
- Departamento de Química Física, Universidad Complutense de Madrid, Ciudad Universitaria s/n, Madrid 28040, Spain; Instituto Pluridisciplinar, Universidad Complutense de Madrid, Paseo Juan XXIII 1, Madrid 28040, Spain.
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Penfold J, Thomas RK. Counterion Condensation, the Gibbs Equation, and Surfactant Binding: An Integrated Description of the Behavior of Polyelectrolytes and Their Mixtures with Surfactants at the Air-Water Interface. J Phys Chem B 2020; 124:6074-6094. [PMID: 32608983 DOI: 10.1021/acs.jpcb.0c02988] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
By applying the Gibbs equation to the bulk binding isotherms and surface composition of the air-water (A-W) interface in polyelectrolyte-surfactant (PE-S) systems, we show that their surface behavior can be explained semiquantitatively in terms of four concentration regions, which we label as A, B, C, and D. In the lowest-concentration range A, there are no bound PE-S complexes in the bulk but there may be adsorption of PE-S complexes at the surface. When significant adsorption occurs in this region, the surface tension (ST) drops with increasing concentration like a simple surfactant solution. Region B extends from the onset of bulk PE-S binding to the end of cooperative binding, in which the slow variation of surfactant activity with cooperative binding means that the ST changes relatively little, although adsorption may be significant. This leads to an approximate plateau, which may be at high or low ST. Region C starts where the binding in the bulk complex loses its cooperativity leading to a rapid change of surfactant activity with the total concentration. This, combined with significant adsorption, often leads to a sharp drop in ST. Region D is where precipitation and redissolution of the bulk PE-S complex occur. ST peaks may arise in region D because of loss of the solution complex that matches the value of the preferred surface stoichiometry, which seems to have a well-defined value for each system. The analysis is applied to the experimental systems, sodium polystyrene sulfonate-alkyltrimethylammonium bromides and poly(diallyldimethyl chloride)-sodium alkyl sulfates, with and without the added electrolyte, and includes data from bulk binding isotherms, phase diagrams, aggregation behavior, and direct measurements of the surface excess and stoichiometry of the surface. The successful fits of the Gibbs equation to the data confirm that the surfaces in these systems are largely equilibrated.
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Affiliation(s)
- Jeffrey Penfold
- STFC, Rutherford-Appleton Laboratory, Chilton, Didcot, Oxfordshire OX11 0RA, U.K
| | - Robert K Thomas
- Physical and Theoretical Chemistry Laboratory, South Parks Road, Oxford OX1 3QZ, U.K
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45
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Owiwe MT, Ayyad AH, Takrori FM. Surface tension of the oppositely charged sodium poly(styrene sulfonate) /benzyldimethylhexadecylammonium chloride and sodium poly(styrene sulfonate)/polyallylamine hydrochloride mixtures. Colloid Polym Sci 2020. [DOI: 10.1007/s00396-020-04692-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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46
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Leermakers FAM, Luengo GS, Baghdadli N, Mazilier C, Potter A, Léonforte F. Turning autophobic wetting on biomimetic surfaces into complete wetting by wetting additives. SOFT MATTER 2020; 16:4823-4839. [PMID: 32412035 DOI: 10.1039/d0sm00129e] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Autophobicity or pseudo partial wetting, a phenomenon of a liquid not spreading on its own monolayer, is characterized by an energy barrier that prevents the growth of a wetting film beyond the monolayer thickness. Applying a molecularly detailed self-consistent field theory we illustrate how autophobic wetting can be overcome by wetting additives. More specifically we use an emulsifier which keeps the interfacial tension between the wetting component and the majority solvent low, and a co-solvent additive which partitions inside the film and then destroys the molecular order in it so that the barrier for film growth is cleared. An application wherein it is believed that autophobic wetting is counteracted by such a set of wetting additives is found in an antidandruff shampoo formulation. We have experimental results that show thick deposits onto hydrophobic hair surfaces by administration of the antidandruff shampoo. The complementary modeling of such a system suggests that the active ingredient plays the role of the co-solvent additive. As significant amounts of the co-solvent additives are needed to approach the completely wet state, the formulation naturally brings large amounts of active ingredient to the root of the hair where its presence is required.
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Affiliation(s)
- Frans A M Leermakers
- Physical Chemistry and Soft Matter, Wageningen University, Stippeneng 4, 6708 WE Wageningen, The Netherlands
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47
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Abiko Y, Hayasaki T, Hirayama S, Almarasy AA, Fujimori A. Fabrication of organo-modified carbon nanotube with excellent heat resistance and preparation of its polymer-based nanocomposite by simple melt compounding. Polym Bull (Berl) 2020. [DOI: 10.1007/s00289-020-03180-w] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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48
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Mal A, Saha A, Dinda G, Ghosh S. Effect of carbohydrate based polymers on worm-like micelles of cetyltrimethylammonium p-toluenesulfonate in aqueous media: Detail physicochemical and antimicrobial properties survey. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2019.112153] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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49
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de Freitas DV, Kuhn BL, Bender CR, Furuyama Lima AM, de Freitas Lima M, Tiera MJ, Kloster CL, Frizzo CP, Villetti MA. Thermodynamics of the aggregation of imidazolium ionic liquids with sodium alginate or hydroxamic alginate in aqueous solution. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2019.111734] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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50
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Ray D, Das B. Micellization of Ionic Liquid Surfactants Induced by Sodium Polystyrenesulfonate in Aqueous Solutions. J SOLUTION CHEM 2019. [DOI: 10.1007/s10953-019-00929-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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