51
|
Degen P, Paulus M, Zwar E, Jakobi V, Dogan S, Tolan M, Rehage H. Surfactant‐mediated formation of alginate layers at the water‐air interface. SURF INTERFACE ANAL 2019. [DOI: 10.1002/sia.6691] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
| | | | - Elena Zwar
- Faculty of ChemistryTU Dortmund Dortmund Germany
| | - Victoria Jakobi
- Analytical Chemistry—BiointerfacesRuhr‐University Bochum Bochum Germany
| | - Susanne Dogan
- Faculty of Physics/DELTATU Dortmund Dortmund Germany
| | - Metin Tolan
- Faculty of Physics/DELTATU Dortmund Dortmund Germany
| | - Heinz Rehage
- Faculty of ChemistryTU Dortmund Dortmund Germany
| |
Collapse
|
52
|
Stanimirova RD, Kralchevsky PA, Danov KD, Xu H, Ung YW, Petkov JT. Oil drop deposition on solid surfaces in mixed polymer-surfactant solutions in relation to hair- and skin-care applications. Colloids Surf A Physicochem Eng Asp 2019. [DOI: 10.1016/j.colsurfa.2019.05.044] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
|
53
|
Daifa M, Shmoeli E, Domb AJ. Enhanced flocculation activity of polyacrylamide‐based flocculant for purification of industrial wastewater. POLYM ADVAN TECHNOL 2019. [DOI: 10.1002/pat.4730] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Mahran Daifa
- Institute of Drug Research, School of Pharmacy‐Faculty of MedicineThe Hebrew University of Jerusalem Jerusalem Israel
| | - Eliyahu Shmoeli
- Institute of Drug Research, School of Pharmacy‐Faculty of MedicineThe Hebrew University of Jerusalem Jerusalem Israel
| | - Abraham J. Domb
- Institute of Drug Research, School of Pharmacy‐Faculty of MedicineThe Hebrew University of Jerusalem Jerusalem Israel
| |
Collapse
|
54
|
Two Different Scenarios for the Equilibration of Polycation—Anionic Solutions at Water–Vapor Interfaces. COATINGS 2019. [DOI: 10.3390/coatings9070438] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
The assembly in solution of the cationic polymer poly(diallyldimethylammonium chloride) (PDADMAC) and two different anionic surfactants, sodium lauryl ether sulfate (SLES) and sodium N-lauroyl-N-methyltaurate (SLMT), has been studied. Additionally, the adsorption of the formed complexes at the water–vapor interface have been measured to try to shed light on the complex physico-chemical behavior of these systems under conditions close to that used in commercial products. The results show that, independently of the type of surfactant, polyelectrolyte-surfactant interactions lead to the formation of kinetically trapped aggregates in solution. Such aggregates drive the solution to phase separation, even though the complexes should remain undercharged along the whole range of explored compositions. Despite the similarities in the bulk behavior, the equilibration of the interfacial layers formed upon adsorption of kinetically trapped aggregates at the water–vapor interface follows different mechanisms. This was pointed out by surface tension and interfacial dilational rheology measurements, which showed different equilibration mechanisms of the interfacial layer depending on the nature of the surfactant: (i) formation layers with intact aggregates in the PDADMAC-SLMT system, and (ii) dissociation and spreading of kinetically trapped aggregates after their incorporation at the fluid interface for the PDADMAC-SLES one. This evidences the critical impact of the chemical nature of the surfactant in the interfacial properties of these systems. It is expected that this work may contribute to the understanding of the complex interactions involved in this type of system to exploit its behavior for technological purposes.
Collapse
|
55
|
Liang Y, Guo Y, Yang X, Feng R, Zhang X, Li H. Insights on the interaction between sodium dodecyl sulfate and partially hydrolyzed microblock hydrophobically associating polyacrylamides in different polymer concentration regimes. Colloids Surf A Physicochem Eng Asp 2019. [DOI: 10.1016/j.colsurfa.2019.03.068] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
56
|
Li P, Penfold J, Thomas RK, Xu H. Multilayers formed by polyelectrolyte-surfactant and related mixtures at the air-water interface. Adv Colloid Interface Sci 2019; 269:43-86. [PMID: 31029983 DOI: 10.1016/j.cis.2019.04.002] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2019] [Revised: 04/13/2019] [Accepted: 04/13/2019] [Indexed: 01/01/2023]
Abstract
The structure and occurrence of multilayered adsorption at the air-water interface of surfactants in combination with other oppositely charged species is reviewed. The main species that trigger multilayer formation are multiply charged metal, oligo- and polyions. The structures vary from the attachment of one or two more or less complete surfactant bilayers to the initial surfactant monolayer at the air-water interface to the attachment of a greater number of bilayers with a more defective structure. The majority of the wide range of observations of such structures have been made using neutron reflectometry. The possible mechanisms for the attraction of surfactant bilayers to an air-water interface are discussed and particular attention is given to the question of whether these structures are true equilibrium structures.
Collapse
Affiliation(s)
- Peixun Li
- STFC, Rutherford-Appleton Laboratory, Chilton, Didcot, Oxfordshire, OX11 0RA, United Kingdom
| | - Jeffery Penfold
- STFC, Rutherford-Appleton Laboratory, Chilton, Didcot, Oxfordshire, OX11 0RA, United Kingdom
| | - Robert K Thomas
- Physical and Theoretical Chemistry Laboratory, South Parks Road, Oxford, OX1 3QZ, United Kingdom.
| | - Hui Xu
- KLK OLEO, Room 1603, 16th Floor, LZY Tower, 4711 Jiao Tong Road, Putuo District, Shanghai 200331, China
| |
Collapse
|
57
|
Kakizawa Y, Miyake M. Creation of New Functions by Combination of Surfactant and Polymer - Complex Coacervation with Oppositely Charged Polymer and Surfactant for Shampoo and Body Wash. J Oleo Sci 2019; 68:525-539. [PMID: 31092801 DOI: 10.5650/jos.ess19081] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
The combination of polymers and surfactants is an important means to create various functions in recent detergents and personal care products. In particular, detergents mixing oppositely charged anionic surfactants and cationic polymers induce coacervation by the dilution of the washing and rinsing process, and the complexes effectively adsorb onto surfaces and can change their characteristics. The driving force of the coacervation is electrostatic interaction between the anionic groups of the surfactant and the cationic groups of the polymer. Normally, the coacervation is controlled by selecting the molecular structure or the amount of polymer and surfactant. In shampoo and body wash compositions, we studied the complex precipitation (CP) regions and the morphology and rheological properties of precipitated complexes by focusing on the number of ionic groups in the anionic surfactants and cationic polymers, the mixed electrolyte and the ionic strength as a whole. This clarified the factors related to complex functions. For coacervation in shampoo based on alkyl ethoxylate sulfate (AES), the degree of cationization of the cationic cellulose (CC) and coexisting electrolyte greatly contributed to these functions. In a combination of moderately cationically charged CC and AES mixed amphoteric surfactant, the precipitated complexes became a loose mesh-like morphology, which was also formed when the charge shielding effect was enhanced by adding electrolyte. The precipitated complexes with a looser mesh-like morphology gave a smooth texture to the hair surface during rinsing.On the other hand, for coacervation in body wash based on fatty acid salt, the complexes were effectively precipitated in a combination with a synthetic polymer, poly diallyldimethylammonium chloride (PDADMAC), which has a higher cationic charge than CC. The precipitated complexes had high adsorbability onto skin and contributed to a moisturizing effect by lowering transepidermal water loss (TEWL).In this review, we introduce the controllable factors of coacervation in shampoo and body wash systems by focusing on the relationship between dilution processes and precipitation behavior.
Collapse
Affiliation(s)
- Yasushi Kakizawa
- Advanced Analytical Science Research Laboratories, LION Corporation
| | - Miyuki Miyake
- Advanced Analytical Science Research Laboratories, LION Corporation
| |
Collapse
|
58
|
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.
Collapse
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
| |
Collapse
|
59
|
Grządka E, Matusiak J, Stankevič M. Interactions between fluorocarbon surfactants and polysaccharides. J Mol Liq 2019. [DOI: 10.1016/j.molliq.2019.03.059] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
60
|
Forces between oil drops in polymer-surfactant systems: Linking direct force measurements to microfluidic observations. J Colloid Interface Sci 2019; 544:130-143. [DOI: 10.1016/j.jcis.2019.02.051] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2018] [Revised: 02/15/2019] [Accepted: 02/16/2019] [Indexed: 11/22/2022]
|
61
|
Mandal B, Ghosh S, Moulik SP. Interaction between a bio-tolerable amino-acid based amphiphile (N-dodecanoylsarcosinate, SDDS) and modified cationic polymers, hydroxyethylcelluloses (JR 400, and LM 200) in isopropanol-water medium. Colloids Surf A Physicochem Eng Asp 2019. [DOI: 10.1016/j.colsurfa.2019.01.002] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
|
62
|
Schulze-Zachau F, Braunschweig B. C nTAB/polystyrene sulfonate mixtures at air-water interfaces: effects of alkyl chain length on surface activity and charging state. Phys Chem Chem Phys 2019; 21:7847-7856. [PMID: 30916092 DOI: 10.1039/c9cp01107b] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Binding and phase behavior of oppositely charged polyelectrolytes and surfactants with different chain lengths were studied in aqueous bulk solutions and at air-water interfaces. In particular, we have investigated the polyanion poly(sodium 4-styrenesulfonate) (NaPSS) and the cationic surfactants dodecyltrimethylammonium bromide (C12TAB), tetradecyltrimethylammonium bromide (C14TAB) and cetyltrimethylammonium bromide (C16TAB). In order to reveal the surfactant/polyelectrolyte binding, aggregation and phase separation of the mixtures, we have varied the NaPSS concentration systematically and have kept the surfactant concentration fixed at 1/6 of the respective critical micelle concentration. Information on the behavior in the bulk solution was gained by electrophoretic mobility and turbidity measurements, while the surface properties were studied using surface tension measurements and vibrational sum-frequency generation (SFG). This has enabled us to relate bulk to interfacial properties with respect to the charging state and the surfactants' binding efficiency. We found that the latter two are strongly dependent on the alkyl chain length of the surfactant and that binding is much more efficient as the alkyl chain length of the surfactant increases. This also results in a different phase behavior as shown by turbidity measurements of the bulk solutions. Charge neutral aggregates that are forming in the bulk adsorb onto the air-water interface - an effect that is likely caused by the increased hydrophobicity of CnTAB/PSS complexes. This conclusion is corroborated by SFG spectroscopy, where we observe a decrease in the intensity of O-H stretching bands, which is indicative of a decrease in surface charging and the formation of interfaces with negligible net charge. Particularly at mixing ratios that are in the equilibrium two-phase region, we observe weak O-H intensities and thus surface charging.
Collapse
Affiliation(s)
- Felix Schulze-Zachau
- Institute of Physical Chemistry and Center for Soft Nanoscience, Westfälische Wilhelms-Universität Münster, Corrensstraße 28/30, 48149 Münster, Germany.
| | | |
Collapse
|
63
|
Hoffmann I, Simon M, Bleuel M, Falus P, Gradzielski M. Structure, Dynamics, and Composition of Large Clusters in Polyelectrolyte–Surfactant Systems. Macromolecules 2019. [DOI: 10.1021/acs.macromol.8b02611] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Ingo Hoffmann
- Institut Max von
Laue-Paul Langevin (ILL), 71 avenue des Martyrs, CS 20156, Cedex 9, F-38042 Grenoble, France
- Stranski-Laboratorium für Physikalische und Theoretische Chemie, Institut für Chemie, Technische Universität Berlin, Straße des 17. Juni 124, Sekr. TC 7, D-10623 Berlin, Germany
| | - Miriam Simon
- Stranski-Laboratorium für Physikalische und Theoretische Chemie, Institut für Chemie, Technische Universität Berlin, Straße des 17. Juni 124, Sekr. TC 7, D-10623 Berlin, Germany
| | - Markus Bleuel
- NIST Center for Neutron Research, National Institute of Standards and Technology, 100 Bureau Drive, Gaithersburg, Maryland 20899-6102, United States
- Department of Materials Science and Engineering, University of Maryland, College Park, Maryland 20742-2115, United States
| | - Peter Falus
- Institut Max von
Laue-Paul Langevin (ILL), 71 avenue des Martyrs, CS 20156, Cedex 9, F-38042 Grenoble, France
| | - Michael Gradzielski
- Stranski-Laboratorium für Physikalische und Theoretische Chemie, Institut für Chemie, Technische Universität Berlin, Straße des 17. Juni 124, Sekr. TC 7, D-10623 Berlin, Germany
| |
Collapse
|
64
|
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]
|
65
|
Mansour OT, Cattoz B, Beaube M, Heenan RK, Schweins R, Hurcom J, Griffiths PC. Segregation versus Interdigitation in Highly Dynamic Polymer/Surfactant Layers. Polymers (Basel) 2019; 11:polym11010109. [PMID: 30960093 PMCID: PMC6402036 DOI: 10.3390/polym11010109] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2018] [Revised: 12/23/2018] [Accepted: 12/28/2018] [Indexed: 11/29/2022] Open
Abstract
Many polymer/surfactant formulations involve a trapped kinetic state that provides some beneficial character to the formulation. However, the vast majority of studies on formulations focus on equilibrium states. Here, nanoscale structures present at dynamic interfaces in the form of air-in-water foams are explored, stabilised by mixtures of commonly used non-ionic, surface active block copolymers (Pluronic®) and small molecule ionic surfactants (sodium dodecylsulfate, SDS, and dodecyltrimethylammonium bromide, C12TAB). Transient foams formed from binary mixtures of these surfactants shows considerable changes in stability which correlate with the strength of the solution interaction which delineate the interfacial structures. Weak solution interactions reflective of distinct coexisting micellar structures in solution lead to segregated layers at the foam interface, whereas strong solution interactions lead to mixed structures both in bulk solution, forming interdigitated layers at the interface.
Collapse
Affiliation(s)
- Omar T Mansour
- Faculty of Engineering and Science, University of Greenwich, Medway Campus, Central Avenue, Chatham Maritime, Kent ME4 4TB, UK.
| | - Beatrice Cattoz
- Faculty of Engineering and Science, University of Greenwich, Medway Campus, Central Avenue, Chatham Maritime, Kent ME4 4TB, UK.
| | - Manon Beaube
- Faculty of Engineering and Science, University of Greenwich, Medway Campus, Central Avenue, Chatham Maritime, Kent ME4 4TB, UK.
| | - Richard K Heenan
- Science and Technology Facilities Council, ISIS Facility, Rutherford Appleton Laboratory, Didcot, Oxfordshire OX11 0QX, UK.
| | - Ralf Schweins
- Institut Laue Langevin ILL, 6 rue Jules Horowitz, 38000 Grenoble, France.
| | - Jamie Hurcom
- School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff CF10 3TB, UK.
| | - Peter C Griffiths
- Faculty of Engineering and Science, University of Greenwich, Medway Campus, Central Avenue, Chatham Maritime, Kent ME4 4TB, UK.
| |
Collapse
|
66
|
Khan N, Brettmann B. Intermolecular Interactions in Polyelectrolyte and Surfactant Complexes in Solution. Polymers (Basel) 2018; 11:E51. [PMID: 30960035 PMCID: PMC6401804 DOI: 10.3390/polym11010051] [Citation(s) in RCA: 86] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2018] [Revised: 12/20/2018] [Accepted: 12/28/2018] [Indexed: 12/20/2022] Open
Abstract
Polyelectrolytes are an important class of polymeric materials and are increasingly used in complex industrial formulations. A core use of these materials is in mixtures with surfactants, where a combination of hydrophobic and electrostatic interactions drives unique solution behavior and structure formation. In this review, we apply a molecular level perspective to the broad literature on polyelectrolyte-surfactant complexes, discussing explicitly the hydrophobic and electrostatic interaction contributions to polyelectrolyte surfactant complexes (PESCs), as well as the interplay between the two molecular interaction types. These interactions are sensitive to a variety of solution conditions, such as pH, ionic strength, mixing procedure, charge density, etc. and these parameters can readily be used to control the concentration at which structures form as well as the type of structure in the bulk solution.
Collapse
Affiliation(s)
- Nasreen Khan
- Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA.
| | - Blair Brettmann
- Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA.
| |
Collapse
|
67
|
Šindelka K, Limpouchová Z, Procházka K. Computer study of the solubilization of polymer chains in polyelectrolyte complex cores of polymeric nanoparticles in aqueous media. Phys Chem Chem Phys 2018; 20:29876-29888. [PMID: 30468444 DOI: 10.1039/c8cp05907a] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
The formation and structure of nanoparticles containing non-polar polymer chains solubilized in interpolyelectrolyte complex (IPC) cores and the partitioning of non-polar chains between bulk solvent and IPC cores were studied by coarse-grained computer simulations. The choice of the model system was inspired by experimental results published by van der Burgh et al. (Langmuir, 2004, 20, 1073-1084). The dissipative particle dynamics (DPD) simulations reproduced the structure and basic features of co-assembled nanoparticles described by experimentalists well at the semi-quantitative coarse-grained level and revealed new properties of co-assembled particles. The simulated co-assemblies were used as reference systems for the solubilization studies. Their results show that non-polar polymers (electrically neutral and compatible with core-forming chains) solubilize easily in IPC cores. They intermix with polyelectrolyte blocks in cores and do not hinder, but, on the contrary, they slightly promote the electrostatic co-assembly.
Collapse
Affiliation(s)
- Karel Šindelka
- Department of Physical and Macromolecular Chemistry, Faculty of Science, Charles University in Prague, Hlavova 2030, 128 40 Prague 2, Czech Republic.
| | | | | |
Collapse
|
68
|
Davidson ML, Walker LM. Interfacial Properties of Polyelectrolyte-Surfactant Aggregates at Air/Water Interfaces. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:12906-12913. [PMID: 30274519 DOI: 10.1021/acs.langmuir.8b02438] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The transport, equilibrium properties, and mechanics of stable, rodlike surfactant-polyelectrolyte aggregates, poly(cetyltrimethylammonium vinyl benzoate) or pCTVB, are characterized at air/water interfaces for bulk concentrations near and below the critical aggregation concentration. The surfactant drives the transport to air/water interfaces, while the polyelectrolyte provides elasticity to the coated interfaces and appears to remain adsorbed after the bulk solution is exchanged with water. The processing of interfaces is shown to allow the interfacial tension of the interface to be changed significantly while maintaining a high dilatational elasticity. The results of this work provide a tool to control interfacial properties through design of polyelectrolyte-surfactant complexes.
Collapse
Affiliation(s)
- Michael L Davidson
- Department of Chemical Engineering , Carnegie Mellon University , Pittsburgh , Pennsylvania 15213 , United States
| | - Lynn M Walker
- Department of Chemical Engineering , Carnegie Mellon University , Pittsburgh , Pennsylvania 15213 , United States
| |
Collapse
|
69
|
Maestro A, Santini E, Guzmán E. Physico-chemical foundations of particle-laden fluid interfaces. THE EUROPEAN PHYSICAL JOURNAL. E, SOFT MATTER 2018; 41:97. [PMID: 30141087 DOI: 10.1140/epje/i2018-11708-6] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2018] [Accepted: 07/27/2018] [Indexed: 06/08/2023]
Abstract
Particle-laden interfaces are ubiquitous nowadays. The understanding of their properties and structure is essential for solving different problems of technological and industrial relevance; e.g. stabilization of foams, emulsions and thin films. These rely on the response of the interface to mechanical perturbations. The complex mechanical response appearing in particle-laden interfaces requires deepening on the understanding of physico-chemical mechanisms underlying the assembly of particles at interface which plays a central role in the distribution of particles at the interface, and in the complex interfacial dynamics appearing in these systems. Therefore, the study of particle-laden interfaces deserves attention to provide a comprehensive explanation on the complex relaxation mechanisms involved in the stabilization of fluid interfaces.
Collapse
Affiliation(s)
- Armando Maestro
- Institut Laue-Langevin, 71 avenue des Martyrs, CS 20156, 38042, Grenoble, Cedex 9, France
| | - Eva Santini
- Istituto di Chimica della Materia Condensata e di Tecnologia per l'Energia (ICMATE), U.O.S. Genova-Consiglio Nazionale delle Ricerche (CNR), Via De Marini 6, 16149, Genova, Italy
| | - Eduardo Guzmán
- Departamento de Química Física I, Universidad Complutense de Madrid, Ciudad Universitaria s/n, 28040, Madrid, Spain.
- Instituto Pluridisciplinar, Universidad Complutense de Madrid, Paseo Juan XXIII, 1, 28040, Madrid, Spain.
| |
Collapse
|
70
|
Schabes BK, Altman RM, Richmond GL. Come Together: Molecular Details into the Synergistic Effects of Polymer–Surfactant Adsorption at the Oil/Water Interface. J Phys Chem B 2018; 122:8582-8590. [DOI: 10.1021/acs.jpcb.8b05432] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Brandon K. Schabes
- Department of Chemistry and Biochemistry, University of Oregon, Eugene, Oregon 97403, United States
| | - Rebecca M. Altman
- 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
| |
Collapse
|
71
|
Akanno A, Guzmán E, Fernández-Peña L, Llamas S, Ortega F, Rubio RG. Equilibration of a Polycation-Anionic Surfactant Mixture at the Water/Vapor Interface. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:7455-7464. [PMID: 29856927 DOI: 10.1021/acs.langmuir.8b01343] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
The adsorption of concentrated poly(diallyldimethylammonium chloride) (PDADMAC)-sodium lauryl ether sulfate (SLES) mixtures at the water/vapor interface has been studied by different surface tension techniques and dilational viscoelasticity measurements. This work tries to shed light on the way in which the formation of polyelectrolyte-surfactant complexes in the bulk affects the interfacial properties of mixtures formed by a polycation and an oppositely charged surfactant. The results are discussed in terms of a two-step adsorption-equilibration of PDADMAC-SLES complexes at the interface, with the initial stages involving the diffusion of kinetically trapped aggregates formed in the bulk to the interface followed by the dissociation and spreading of such aggregates at the interface. This latter process becomes the main contribution to the surface tension decrease. This work aids our understanding of the most fundamental basis of the physicochemical behavior of concentrated polyelectrolyte-surfactant mixtures which present complex bulk and interfacial interactions with interest in both basic and applied sciences.
Collapse
Affiliation(s)
- Andrew Akanno
- Departamento de Química Física , Universidad Complutense de Madrid, Ciudad Universitaria s/n , 28040 Madrid , Spain
- Instituto Pluridisciplinar, Universidad Complutense de Madrid , Paseo Juan XXIII, 1 , 28040 Madrid , Spain
| | - Eduardo Guzmán
- Departamento de Química Física , Universidad Complutense de Madrid, Ciudad Universitaria s/n , 28040 Madrid , Spain
- Instituto Pluridisciplinar, Universidad Complutense de Madrid , Paseo Juan XXIII, 1 , 28040 Madrid , Spain
| | - Laura Fernández-Peña
- Departamento de Química Física , Universidad Complutense de Madrid, Ciudad Universitaria s/n , 28040 Madrid , Spain
| | - Sara Llamas
- Departamento de Química Física , Universidad Complutense de Madrid, Ciudad Universitaria s/n , 28040 Madrid , Spain
| | - Francisco Ortega
- Departamento de Química Física , Universidad Complutense de Madrid, Ciudad Universitaria s/n , 28040 Madrid , Spain
- Instituto Pluridisciplinar, Universidad Complutense de Madrid , Paseo Juan XXIII, 1 , 28040 Madrid , Spain
| | - Ramón G Rubio
- Departamento de Química Física , Universidad Complutense de Madrid, Ciudad Universitaria s/n , 28040 Madrid , Spain
- Instituto Pluridisciplinar, Universidad Complutense de Madrid , Paseo Juan XXIII, 1 , 28040 Madrid , Spain
| |
Collapse
|
72
|
Fainerman VB, Kovalchuk VI, Aksenenko EV, Zinkovych II, Makievski AV, Nikolenko MV, Miller R. Dilational Viscoelasticity of Proteins Solutions in Dynamic Conditions. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:6678-6686. [PMID: 29783835 DOI: 10.1021/acs.langmuir.8b00631] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Drop profile analysis tensiometry used in the oscillating drop mode provides the dilational viscoelasticity of adsorption layers at liquid interfaces. Applied during the progress of adsorption the dynamic surface rheology can be monitored. For β-casein solutions at the same surface pressure values, the larger the dynamic dilational viscoelasticity the longer the adsorption time, i.e., the smaller the studied protein concentration is. For β-lactoglobulin and human serum albumin, the differences in the viscoelasticity values are less or not dependent on the adsorption time at identical surface pressures. The observed effects are caused by the flexibility of BCS, while the globular proteins BLG and HSA do not change their conformation significantly within the adsorption layer.
Collapse
Affiliation(s)
| | | | - Eugene V Aksenenko
- Institute of Colloid Chemistry and Chemistry of Water , Kyiv (Kiev) 03680 , Ukraine
| | - Igor I Zinkovych
- Maxim Gorki Donetsk National Medical University , Kirovohrad 25015 , Ukraine
| | | | - Mykola V Nikolenko
- Ukrainian State University of Chemical Technology , Dnipro 49005 , Ukraine
| | | |
Collapse
|
73
|
Cortez ML, Lorenzo A, Marmisollé WA, von Bilderling C, Maza E, Pietrasanta L, Battaglini F, Ceolín M, Azzaroni O. Highly-organized stacked multilayers via layer-by-layer assembly of lipid-like surfactants and polyelectrolytes. Stratified supramolecular structures for (bio)electrochemical nanoarchitectonics. SOFT MATTER 2018; 14:1939-1952. [PMID: 29479625 DOI: 10.1039/c8sm00052b] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Supramolecular self-assembly is of paramount importance for the development of novel functional materials with molecular-level feature control. In particular, the interest in creating well-defined stratified multilayers through simple methods using readily available building blocks is motivated by a multitude of research activities in the field of "nanoarchitectonics" as well as evolving technological applications. Herein, we report on the facile preparation and application of highly organized stacked multilayers via layer-by-layer assembly of lipid-like surfactants and polyelectrolytes. Polyelectrolyte multilayers with high degree of stratification of the internal structure were constructed through consecutive assembly of polyallylamine and dodecyl phosphate, a lipid-like surfactant that act as a structure-directing agent. We show that multilayers form well-defined lamellar hydrophilic/hydrophobic domains oriented parallel to the substrate. More important, X-ray reflectivity characterization conclusively revealed the presence of Bragg peaks up to fourth order, evidencing the highly stratified structure of the multilayer. Additionally, hydrophobic lamellar domains were used as hosts for ferrocene in order to create an electrochemically active film displaying spatially-addressed redox units. Stacked multilayers were then assembled integrating redox-tagged polyallylamine and glucose oxidase into the stratified hydrophilic domains. Bioelectrocatalysis and "redox wiring" in the presence of glucose was demonstrated to occur inside the stratified multilayer.
Collapse
Affiliation(s)
- M Lorena Cortez
- Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA), Departamento de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata - CONICET, La Plata, Argentina.
| | | | | | | | | | | | | | | | | |
Collapse
|
74
|
|
75
|
Tummino A, Toscano J, Sebastiani F, Noskov BA, Varga I, Campbell RA. Effects of Aggregate Charge and Subphase Ionic Strength on the Properties of Spread Polyelectrolyte/Surfactant Films at the Air/Water Interface under Static and Dynamic Conditions. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:2312-2323. [PMID: 29323919 DOI: 10.1021/acs.langmuir.7b03960] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
We demonstrate the ability to tune the formation of extended structures in films of poly(sodium styrenesulfonate)/dodecyltrimethylammonium bromide at the air/water interface through control over the charge/structure of aggregates as well as the ionic strength of the subphase. Our methodology to prepare loaded polyelectrolyte/surfactant films from self-assembled liquid crystalline aggregates exploits their fast dissociation and Marangoni spreading of material upon contact with an aqueous subphase. This process is proposed as a potential new route to prepare cheap biocompatible films for transfer applications. We show that films spread on water from swollen aggregates of low/negative charge have 1:1 charge binding and can be compressed only to a monolayer, beyond which material is lost to the bulk. For films spread on water from compact aggregates of positive charge, however, extended structures of the two components are created upon spreading or upon compression of the film beyond a monolayer. The application of ellipsometry, Brewster angle microscopy, and neutron reflectometry as well as measurements of surface pressure isotherms allow us to reason that formation of extended structures is activated by aggregates embedded in the film. The situation upon spreading on 0.1 M NaCl is different as there is a high concentration of small ions that stabilize loops of the polyelectrolyte upon film compression, yet extended structures of both components are only transient. Analogy of the controlled formation of extended structures in fluid monolayers is made to reservoir dynamics in lung surfactant. The work opens up the possibility to control such film dynamics in related systems through the rational design of particles in the future.
Collapse
Affiliation(s)
- Andrea Tummino
- Institut Laue-Langevin, 71 avenue des Martyrs, CS20156, Cedex 9 38042 Grenoble, France
- Institute of Chemistry, Eötvös Loránd University , 112, P.O. Box 32, Budapest H-1518, Hungary
| | - Jutta Toscano
- Institut Laue-Langevin, 71 avenue des Martyrs, CS20156, Cedex 9 38042 Grenoble, France
| | - Federica Sebastiani
- Institut Laue-Langevin, 71 avenue des Martyrs, CS20156, Cedex 9 38042 Grenoble, France
- Department of Biomedical Science, Faculty of Health and Science, Malmö University , 21432 Malmö, Sweden
| | - Boris A Noskov
- Institute of Chemistry, St. Petersburg State University , Universitetsky pr. 2, 198904 St. Petersburg, Russia
| | - Imre Varga
- Institute of Chemistry, Eötvös Loránd University , 112, P.O. Box 32, Budapest H-1518, Hungary
- Department of Chemistry, University J. Selyeho , Komárno, Slovakia
| | - Richard A Campbell
- Institut Laue-Langevin, 71 avenue des Martyrs, CS20156, Cedex 9 38042 Grenoble, France
| |
Collapse
|
76
|
Llamas S, Fernández-Peña L, Akanno A, Guzmán E, Ortega V, Ortega F, Csaky AG, Campbell RA, Rubio RG. Towards understanding the behavior of polyelectrolyte-surfactant mixtures at the water/vapor interface closer to technologically-relevant conditions. Phys Chem Chem Phys 2018; 20:1395-1407. [PMID: 29297520 DOI: 10.1039/c7cp05528e] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Polyelectrolyte-surfactant mixtures and their interactions with fluid interfaces are an important research field due to their use in technological applications. Most of the existing knowledge on these systems is based on models in which the polyelectrolyte concentration is around 50 times lower than that used in commercial formulations. The present work marks a step to close the gap on the understanding of their behavior under more practically-relevant conditions. The adsorption of concentrated mixtures of poly(diallyldimethyl-ammonium) chloride and sodium N-lauroyl-N-methyltaurate at the water/vapor interface with a crude mixing protocol has been studied by different surface tension techniques, Brewster angle microscopy, neutron reflectometry, and several bulk characterization techniques. Kinetically-trapped aggregates formed during mixing influence the interfacial morphology of mixtures produced in the equilibrium one-phase region, yet fluctuations in the surface tension isotherm result depending on the tensiometric technique applied. At low bulk surfactant concentrations, the free surfactant concentration is very low, and the interfacial composition matches the trend of the bulk complexes, which is a behavior that has not been observed in studies on more dilute mixtures. Nevertheless, a transition to synergistic co-adsorption of complexes and free surfactant is observed at the higher bulk surfactant concentrations studied. This transition appears to be a special feature of these more concentrated mixtures, which deserves attention in future studies of systems with additional components.
Collapse
Affiliation(s)
- Sara Llamas
- Departamento de Química Física I-Universidad Complutense de Madrid, Ciudad Universitaria s/n, 28040 Madrid, Spain.
| | | | | | | | | | | | | | | | | |
Collapse
|
77
|
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]
|
78
|
Yang X, Zhang B, Li P, Guo C, Li J, Li Q. Synthesis of a high surface active polymeric surfactant based on chitosan and characteristics of complexation with cetyltrimetylammonium bromide. J DISPER SCI TECHNOL 2018. [DOI: 10.1080/01932691.2017.1417135] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Xiaoyi Yang
- China Research Institute of Daily Chemical Industry, Taiyuan, P. R. China
| | - Binbin Zhang
- China Research Institute of Daily Chemical Industry, Taiyuan, P. R. China
| | - Ping Li
- China Research Institute of Daily Chemical Industry, Taiyuan, P. R. China
| | - Chaohua Guo
- China Research Institute of Daily Chemical Industry, Taiyuan, P. R. China
| | - Jianbo Li
- China Research Institute of Daily Chemical Industry, Taiyuan, P. R. China
| | - Quanhong Li
- China Research Institute of Daily Chemical Industry, Taiyuan, P. R. China
| |
Collapse
|
79
|
The Use of Polymer and Surfactants for the Microencapsulation and Emulsion Stabilization. COLLOIDS AND INTERFACES 2017. [DOI: 10.3390/colloids1010003] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
80
|
Coagulative colloidal gas aphrons generated from polyaluminum chloride (PACl)/dodecyl dimethyl betaine (BS-12) solution: Interfacial characteristics and flotation potential. Colloids Surf A Physicochem Eng Asp 2017. [DOI: 10.1016/j.colsurfa.2017.07.058] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
|
81
|
Xie K, de Loubens C, Dubreuil F, Gunes DZ, Jaeger M, Léonetti M. Interfacial rheological properties of self-assembling biopolymer microcapsules. SOFT MATTER 2017; 13:6208-6217. [PMID: 28804800 DOI: 10.1039/c7sm01377a] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Tuning the mechanical properties of microcapsules through a cost-efficient route of fabrication is still a challenge. The traditional method of layer-by-layer assembly of microcapsules allows building a tailored composite multi-layer membrane but is technically complex as it requires numerous steps. The objective of this article is to characterize the interfacial rheological properties of self-assembling biopolymer microcapsules that were obtained in one single facile step. This thorough study provides new insights into the mechanics of these weakly cohesive membranes. Firstly, suspensions of water-in-oil microcapsules were formed in microfluidic junctions by self-assembly of two oppositely charged polyelectrolytes, namely chitosan (water soluble) and phosphatidic fatty acid (oil soluble). In this way, composite membranes of tunable thickness (between 40 and 900 nm measured by AFM) were formed at water/oil interfaces in a single step by changing the composition. Secondly, microcapsules were mechanically characterized by stretching them up to break-up in an extensional flow chamber which extends the relevance and convenience of the hydrodynamic method to weakly cohesive membranes. Finally, we show that the design of microcapsules can be 'engineered' in an extensive way since they present a wealth of interfacial rheological properties in terms of elasticity, plasticity and yield stress whose magnitudes can be controlled by the composition. These behaviors are explained by the variation of the membrane thickness with the physico-chemical parameters of the process.
Collapse
Affiliation(s)
- Kaili Xie
- Aix-Marseille Université, CNRS, Centrale Marseille, M2P2 UMR 7340, 13451, Marseille, France
| | | | | | | | | | | |
Collapse
|
82
|
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.
Collapse
|
83
|
Srivastava A, Qiao W, Wu Y, Li X, Bao L, Liu C. Effects of silica nanoparticles and polymers on foam stability with sodium dodecylbenzene sulfonate in water–liquid paraffin oil emulsions at high temperatures. J Mol Liq 2017. [DOI: 10.1016/j.molliq.2017.06.096] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
|
84
|
Electro-optic Kerr effect in the study of mixtures of oppositely charged colloids. The case of polymer-surfactant mixtures in aqueous solutions. Adv Colloid Interface Sci 2017; 247:234-257. [PMID: 28552423 DOI: 10.1016/j.cis.2017.05.015] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2017] [Revised: 05/04/2017] [Accepted: 05/14/2017] [Indexed: 11/20/2022]
Abstract
In this review I highlight a very sensitive experimental technique for the study of polymer-surfactant complexation: The electro-optic Kerr effect. This review does not intend to be exhaustive in covering the Kerr Effect nor polymer-surfactant systems, instead it aims to call attention to an experimental technique that, even if applied in a qualitative manner, could give very rich and unique information about the structures and aggregation processes occurring in mixtures of oppositely charged colloids. The usefulness of electric birefringence experiments in the study of such systems is illustrated by selected results from literature in hope of stimulating the realization of more birefringence experiments on similar systems. This review is mainly aimed at, but not restricted to, researchers working in polyelectrolyte-surfactant mixtures in aqueous solutions, Kerr effect is a powerful experimental tool that could be used in the study of many systems in diverse areas of colloidal physics.
Collapse
|
85
|
Liu CY, Chen HL. Undulating the Lamellar Interface of Polymer–Surfactant Complex by Dendrimer. Macromolecules 2017. [DOI: 10.1021/acs.macromol.7b01122] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Chih-Ying Liu
- Department of Chemical Engineering
and Frontier Research Center on Fundamental and Applied Sciences of
Matters, National Tsing Hua University, Hsinchu 30013, Taiwan
| | - Hsin-Lung Chen
- Department of Chemical Engineering
and Frontier Research Center on Fundamental and Applied Sciences of
Matters, National Tsing Hua University, Hsinchu 30013, Taiwan
| |
Collapse
|
86
|
Simion EL, Stîngă G, Iovescu A, Băran A, Anghel DF. Ageing of fluorescent and smart naphthalene labeled poly(acrylic acid)/cationic surfactant complex. Colloids Surf A Physicochem Eng Asp 2017. [DOI: 10.1016/j.colsurfa.2017.05.025] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
87
|
Fan Y, Kellermeier M, Xu AY, Boyko V, Mirtschin S, Dubin PL. Modulation of Polyelectrolyte–Micelle Interactions via Zeta Potentials. Macromolecules 2017. [DOI: 10.1021/acs.macromol.7b00584] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Yaxun Fan
- Department
of Chemistry, University of Massachusetts at Amherst, Amherst, Massachusetts 01003, United States
- Key
Laboratory of Colloid and Interface Science, Beijing National Laboratory
for Molecular Sciences (BNLMS), Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China
| | - Matthias Kellermeier
- Advanced
Materials and Systems Research, BASF SE, Carl-Bosch-Str. 38, D-67056 Ludwigshafen, Germany
| | - Amy Y. Xu
- Department
of Chemistry, University of Massachusetts at Amherst, Amherst, Massachusetts 01003, United States
| | - Volodymyr Boyko
- Advanced
Materials and Systems Research, BASF SE, Carl-Bosch-Str. 38, D-67056 Ludwigshafen, Germany
| | - Sebastian Mirtschin
- Advanced
Materials and Systems Research, BASF SE, Carl-Bosch-Str. 38, D-67056 Ludwigshafen, Germany
| | - Paul L. Dubin
- Department
of Chemistry, University of Massachusetts at Amherst, Amherst, Massachusetts 01003, United States
| |
Collapse
|
88
|
Varga I, Campbell RA. General Physical Description of the Behavior of Oppositely Charged Polyelectrolyte/Surfactant Mixtures at the Air/Water Interface. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:5915-5924. [PMID: 28493707 DOI: 10.1021/acs.langmuir.7b01288] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
This work reports a unifying general physical description of the behavior of oppositely charged polyelectrolyte/surfactant mixtures at the air/water interface in terms of equilibrium vs nonequilibrium extremes. The poly(diallyldimethylammonium chloride)/sodium dodecyl sulfate system with added NaCl at two different bulk polyelectrolyte concentrations and the poly(sodium styrenesulfonate)/dodecyltrimethylammonium bromide system have been systematically examined using a variety of bulk and surface techniques. Similarities in the general behavior are observed for all the investigated systems. Following the slow precipitation of aggregates in the equilibrium two-phase region, which can take several days or even weeks, depletion of surface-active material can result in a surface tension peak. The limiting time scale in the equilibration of the samples is discussed in terms of a balance between those of aggregate growth and settling. Bulk aggregates may spontaneously dissociate and spread material in the form of a kinetically trapped film if they interact with the interface, and a low surface tension then results out of equilibrium conditions. These interactions can occur prior to bulk equilibration while there remains a suspension of aggregates that can diffuse to the interface and following bulk equilibration if the settled precipitate is disturbed. Two clear differences in the behavior of the systems are the position in the isotherm of the surface tension peak and the time it takes to evolve. These features are both rationalized in terms of the nature of the bulk binding interactions.
Collapse
Affiliation(s)
- Imre Varga
- Institute of Chemistry, Eötvös Loránd University , P.O. Box 32, Budapest H-1518, Hungary
- Department of Chemistry, University J. Selyeho , Komárno, Slovakia
| | - Richard A Campbell
- Institut Laue-Langevin, 71 avenue des Martyrs, CS20156, 38042 Grenoble, France
| |
Collapse
|
89
|
Szczepanowicz K, Para G, Wilk KA, Warszyński P. Co-adsorption of polyanions and esterquat surfactants; effect on formation and stability of micellar core nanocapsules. Colloids Surf A Physicochem Eng Asp 2017. [DOI: 10.1016/j.colsurfa.2016.07.069] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
|
90
|
Kuznetsov V, Akentiev A, Rakhimov V. Evaporation of aqueous solutions of organic acids through spread films of poly(diallyldimethylammonium chloride)/sodium dodecylsulfate complex. SEP SCI TECHNOL 2017. [DOI: 10.1080/01496395.2016.1271341] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Viktor Kuznetsov
- Department of Chemistry, Saint Petersburg State University, St. Petersburg, Russian Federation
| | - Alexander Akentiev
- Department of Chemistry, Saint Petersburg State University, St. Petersburg, Russian Federation
| | - Viktor Rakhimov
- Department of Chemistry, Saint Petersburg State University, St. Petersburg, Russian Federation
| |
Collapse
|
91
|
Wang H, Fan Y, Wang Y. Thermodynamic Association Behaviors of Sodium Dodecyl Sulfate (SDS) with Poly(4-vinylpyridine N-oxide) (PVPNO) at Different pH Values and Ionic Strengths. J SURFACTANTS DETERG 2017. [DOI: 10.1007/s11743-017-1939-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
|
92
|
Gerola AP, Wanderlind EH, Gomes YS, Giusti LA, García-Río L, Nome RA, Kirby AJ, Fiedler HD, Nome F. Supramolecular Polymer/Surfactant Complexes as Catalysts for Phosphate Transfer Reactions. ACS Catal 2017. [DOI: 10.1021/acscatal.7b00097] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Adriana P. Gerola
- INCT-Catálise,
Departamento de Química, Universidade Federal de Santa Catarina, Florianópolis, Santa Catarina 88040-900, Brazil
| | - Eduardo H. Wanderlind
- INCT-Catálise,
Departamento de Química, Universidade Federal de Santa Catarina, Florianópolis, Santa Catarina 88040-900, Brazil
| | - Yasmin S. Gomes
- INCT-Catálise,
Departamento de Química, Universidade Federal de Santa Catarina, Florianópolis, Santa Catarina 88040-900, Brazil
| | - Luciano A. Giusti
- INCT-Catálise,
Departamento de Química, Universidade Federal de Santa Catarina, Florianópolis, Santa Catarina 88040-900, Brazil
| | - Luis García-Río
- Departamento
de Química Física, Centro de Investigación en
Química Biológica y Materiales Moleculares, Universidad de Santiago de Compostela 15782 Santiago de
Compostela, Spain
| | - René A. Nome
- Instituto
de Química, Universidade Estadual de Campinas, Campinas 13083-970, São Paulo, Brazil
| | - Anthony J. Kirby
- Department
of Chemistry, University of Cambridge, Cambridge CB2 1EW, U.K
| | - Haidi D. Fiedler
- INCT-Catálise,
Departamento de Química, Universidade Federal de Santa Catarina, Florianópolis, Santa Catarina 88040-900, Brazil
| | - Faruk Nome
- INCT-Catálise,
Departamento de Química, Universidade Federal de Santa Catarina, Florianópolis, Santa Catarina 88040-900, Brazil
| |
Collapse
|
93
|
Briscoe WH. Aqueous boundary lubrication: Molecular mechanisms, design strategy, and terra incognita. Curr Opin Colloid Interface Sci 2017. [DOI: 10.1016/j.cocis.2016.09.002] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
|
94
|
Bai G, Wu H, Lou P, Wang Y, Nichifor M, Zhuo K, Wang J, Bastos M. Cationic gemini surfactant as a dual linker for a cholic acid-modified polysaccharide in aqueous solution: thermodynamics of interaction and phase behavior. Phys Chem Chem Phys 2017; 19:1590-1600. [PMID: 27990515 DOI: 10.1039/c6cp07212g] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Understanding the thermodynamics of formation of biocompatible aggregates is a key factor in the bottom up approach to the development of novel types of drug carriers and their structural tuning using small amphiphilic molecules. We chose an anionic amphiphilic and biocompatible polymer that consists of a dextran and grafted cholic acid pendants, randomly distributed along the dextran backbone, with a degree of substitution (DS) of 15 mol% (designated Dex-15CACOONa). The thermodynamics of interaction and phase behavior of mixtures of this polyelectrolyte and a cationic gemini surfactant hexanediyl-α,ω-bis(dodecyldimethylammonium bromide) (C12C6C12Br2) or its monomer surfactant dodecyltrimethylammonium bromide (DTAB) in aqueous solution were characterized by isothermal titration calorimetry (ITC) and turbidity, together with cryogenic transmission electron microscopy (Cryo-TEM). The various critical concentrations and the enthalpy changes of the corresponding phase transitions for the oppositely charged system were obtained from the plots of the observed enthalpy change (ΔHobs) and turbidity measurements as a function of gemini concentration. The morphologies of the aggregates in various phases were observed by Cryo-TEM. Altogether these results suggest the critical role of gemini as a dual linker. At the concentrations where the crosslink between the pendant aggregates happens, the free gemini concentration is proximately zero and the aggregate retains its negative charge. The analysis of various factors involved in the interaction allowed a rationalization of the driving forces for mixed aggregate formation, which will contribute to a subsequent rational design of drug delivery systems based on this polymer/surfactant system.
Collapse
Affiliation(s)
- Guangyue Bai
- Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, P. R. China.
| | - Hui Wu
- Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, P. R. China.
| | - Pengxiao Lou
- Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, P. R. China.
| | - Yujie Wang
- School of Chemistry and Chemical Engineering, Henan Institute of Science and Technology, Xinxiang, Henan 453003, P. R. China.
| | - Marieta Nichifor
- "Petru Poni" Institute of Macromolecular Chemistry, 700487 Iasi, Romania.
| | - Kelei Zhuo
- Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, P. R. China.
| | - Jianji Wang
- Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, P. R. China.
| | - Margarida Bastos
- CIQUP, Department of Chemistry and Biochemistry, Faculty of Sciences, University of Porto, R. Campo Alegre, 687, P-4169-007 Porto, Portugal.
| |
Collapse
|
95
|
Recent progress of the characterization of oppositely charged polymer/surfactant complex in dilution deposition system. Adv Colloid Interface Sci 2017; 239:146-157. [PMID: 27337996 DOI: 10.1016/j.cis.2016.04.007] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2016] [Revised: 04/15/2016] [Accepted: 04/27/2016] [Indexed: 10/21/2022]
Abstract
A mixture of oppositely charged polymer and surfactants changes the solubilized state, having a complex precipitation region at the composition of electric neutralization. This complex behavior has been applied to surface modification in the fields of health care and cosmetic products such as conditioning shampoos, as a dilution-deposition system in which the polymer/surfactant mixture at the higher surfactant concentration precipitates the insoluble complex by dilution. A large number of studies over many years have revealed the basic coacervation behavior and physicochemical properties of complexes. However, the mechanism by which a precipitated complex performs surface modification is not well understood. The precipitation region and the morphology of precipitated complex that are changed by molecular structure and additives affect the performance. Hydrophilic groups such as the EO unit in polymers and surfactants, the mixing of nonionic or amphoteric surfactant and nonionic polymer, and the addition of low polar solvent influence the complex precipitation region. Furthermore, the morphology of precipitated complex is formed by crosslinking and aggregating among polymers in the dilution process, and characterizes the performance of products. The polymer chain density in precipitated complex is determined by the charges of both the polymer and surfactant micelle and the conformation of polymer. As a result, the morphology of precipitated complexes is changed from a closely packed film to looser meshes, and/or to small particles, and it is possible for the morphology to control the rheological properties and the amount of adsorbed silicone. In the future, further investigation of the relationships between the morphology and performance is needed.
Collapse
|
96
|
Zhao W, Wang Y. Coacervation with surfactants: From single-chain surfactants to gemini surfactants. Adv Colloid Interface Sci 2017; 239:199-212. [PMID: 27260407 DOI: 10.1016/j.cis.2016.04.005] [Citation(s) in RCA: 90] [Impact Index Per Article: 12.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2016] [Accepted: 04/12/2016] [Indexed: 10/21/2022]
Abstract
Coacervation is a spontaneous process during which a colloidal dispersion separates into two immiscible liquid phases: a colloid-rich liquid phase in equilibrium with a diluted phase. Coacervation is usually divided into simple coacervation and complex coacervation according to the number of components. Surfactant-based coacervation normally contains traditional single-chain surfactants. With the development of surfactants, gemini surfactants with two amphiphilic moieties have been applied to form coacervation. This review summarizes the development of simple coacervation and complex coacervation in the systems of single-chain surfactants and gemini surfactants. Simple coacervation in surfactant solutions with additives or at elevated temperature and complex coacervation in surfactant/polymer mixtures by changing charge densities, molecular weight, ionic strength, pH, or temperature are reviewed. The comparison between gemini surfactants and corresponding monomeric single-chain surfactants reveals that the unique structures of gemini surfactants endow them with higher propensity to generate coacervation.
Collapse
|
97
|
Lyadinskaya VV, Lin SY, Michailov AV, Povolotskiy AV, Noskov BA. Phase Transitions in DNA/Surfactant Adsorption Layers. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:13435-13445. [PMID: 27993018 DOI: 10.1021/acs.langmuir.6b03396] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
The adsorption layers of complexes between DNA and oppositely charged surfactants dodecyltrimethylammonium bromide (DTAB) and cetyltrimethylammonium bromide (CTAB) at the solution/air interface were studied with surface tensiometry, dilational surface rheology, atomic force microscopy, Brewster angle microscopy, infrared absorption-reflection spectroscopy, and ellipsometry. Measurements of the kinetic dependencies of the surface properties gave a possibility to discover the time intervals corresponding to the coexistence of two-dimensional phases. One can assume that the observed phase transition is of the first order, unlike the formation of microaggregates in the adsorption layers of mixed solutions of synthetic polyelectrolytes and surfactants. The multitechniques approach together with the calculations of the adsorption kinetics allowed the elucidation of the structure of coexisting surface phases and the distinguishing of four main steps of adsorption layer formation at the surface of DNA/surfactant solutions.
Collapse
Affiliation(s)
- Vanda V Lyadinskaya
- National Taiwan University of Science and Technology , Chemical Engineering Department, 43 Keelung Road, Section 4, 106 Taipei, Taiwan
| | - Shi-Yow Lin
- National Taiwan University of Science and Technology , Chemical Engineering Department, 43 Keelung Road, Section 4, 106 Taipei, Taiwan
| | - Alexander V Michailov
- Institute of Chemistry, St. Petersburg State University , Universitetsky pr. 26, 198504 St. Petersburg, Russia
| | - Alexey V Povolotskiy
- Institute of Chemistry, St. Petersburg State University , Universitetsky pr. 26, 198504 St. Petersburg, Russia
| | - Boris A Noskov
- Institute of Chemistry, St. Petersburg State University , Universitetsky pr. 26, 198504 St. Petersburg, Russia
| |
Collapse
|
98
|
Bazylińska U, Frąckowiak R, Brzózka Z, Wilk KA. The effect of anionic dicephalic surfactants on fabrication of varied-core nanocarriers for sustained release of porphyrin photosensitizers. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2016; 166:169-179. [PMID: 27915030 DOI: 10.1016/j.jphotobiol.2016.11.012] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/22/2016] [Revised: 11/05/2016] [Accepted: 11/11/2016] [Indexed: 12/15/2022]
Abstract
Double-headed anionic surfactants could provide a profound group of efficient stabilizers of new template-mediated nanocarriers for effective encapsulation and sustained release of highly hydrophobic photosensitizers, and therefore their improved therapeutic activity in photodynamic therapy (PDT) protocols. We have thus encapsulated porphyrin-origin dyes, i.e., verteporfin (VP) and meso-tetraphenylporphyrin (TPP) in different types of sodium alkyliminobisacetates, Cn(COONa)2-stabilized nanosystems including biocompatible poly(l-glutamic acid)/poly(l-lysine) - PGA/PLL, multilayer nanocapsules (NCs). The latter were prepared via a layer-by-layer (LbL) approach with either solid (nanoprecipitated), or liquid (nanoemulsion-templated) oil core while zeta potential measurements enabled to evaluate progress of the polyelectrolytes LbL deposition on both cores and the NCs' stability. Backscattering profiles (BS) confirmed the long-lasting stability of the optimized nanosystems, which size (<200nm), polidyspersity and morphology were examined by dynamic light scattering (DLS) and atomic force microscopy (AFM) techniques. Our studies indicated that the encapsulation of VP and TPP in the both type of multilayer NCs increases their solubility in aqueous solution and protects them from the surrounding medium. Mainly, it reduces the photobleaching rate of these porphyrin-type photosensitizers and improves their photochemical properties during irradiation in regards to the free (non-encapsulated) molecules. As far as the core-type is considered, both nanoemulsion-loaded porphyrins, photobleached ca. 15-20% faster than the solid nanoparticle analogs. By using 9,10-anthracenediyl-bis(methylene)dimalonic acid (ABMDMA) as a singlet oxygen (1O2) scavenger molecule, the enhanced generation of reactive species was evaluated for the both encapsulated photosensitizers in comparison to their native form. In vitro sustained release under physiological conditions or in the presence of human serum albumin (HSA) was achieved in favor of the solid core NCs for VP and TPP. The designed NCs - offering better chemical and physical stability, high loading capacity for the cargo and ability to release it in a controlled and continuous manner - can be considered as efficacious nanocarriers for PDT.
Collapse
Affiliation(s)
- Urszula Bazylińska
- Departament of Organic and Pharmaceutical Technology, Faculty of Chemistry, Wroclaw University of Science and Technology, Wybrzeze Wyspianskiego 27, 50-370 Wroclaw, Poland.
| | - Renata Frąckowiak
- Departament of Organic and Pharmaceutical Technology, Faculty of Chemistry, Wroclaw University of Science and Technology, Wybrzeze Wyspianskiego 27, 50-370 Wroclaw, Poland
| | - Zbigniew Brzózka
- Institute of Biotechnology, Department of Microbioanalytics, Faculty of Chemistry, Warsaw University of Technology, Noakowskiego 3, 00-664 Warsaw, Poland
| | - Kazimiera A Wilk
- Departament of Organic and Pharmaceutical Technology, Faculty of Chemistry, Wroclaw University of Science and Technology, Wybrzeze Wyspianskiego 27, 50-370 Wroclaw, Poland
| |
Collapse
|
99
|
Hoffmann I, Simon M, Farago B, Schweins R, Falus P, Holderer O, Gradzielski M. Structure and dynamics of polyelectrolyte surfactant mixtures under conditions of surfactant excess. J Chem Phys 2016; 145:124901. [PMID: 27782635 DOI: 10.1063/1.4962581] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Affiliation(s)
- Ingo Hoffmann
- Stranski-Laboratorium für Physikalische und Theoretische Chemie, Institut für Chemie, Technische Universität Berlin, Straße des 17. Juni 124, Sekr. TC 7, D-10623 Berlin, Germany
- Institut Max von Laue-Paul Langevin (ILL), 71 Avenue des Martyrs, CS 20156, F-38042 Grenoble Cedex 9, France
| | - Miriam Simon
- Stranski-Laboratorium für Physikalische und Theoretische Chemie, Institut für Chemie, Technische Universität Berlin, Straße des 17. Juni 124, Sekr. TC 7, D-10623 Berlin, Germany
| | - Bela Farago
- Institut Max von Laue-Paul Langevin (ILL), 71 Avenue des Martyrs, CS 20156, F-38042 Grenoble Cedex 9, France
| | - Ralf Schweins
- Institut Max von Laue-Paul Langevin (ILL), 71 Avenue des Martyrs, CS 20156, F-38042 Grenoble Cedex 9, France
| | - Peter Falus
- Institut Max von Laue-Paul Langevin (ILL), 71 Avenue des Martyrs, CS 20156, F-38042 Grenoble Cedex 9, France
| | - Olaf Holderer
- JCNS Outstation at MLZ, Forschungszentrum Jülich GmbH, Lichtenbergstr. 1, 85747 Garching, Germany
| | - Michael Gradzielski
- Stranski-Laboratorium für Physikalische und Theoretische Chemie, Institut für Chemie, Technische Universität Berlin, Straße des 17. Juni 124, Sekr. TC 7, D-10623 Berlin, Germany
| |
Collapse
|
100
|
Llamas S, Guzmán E, Baghdadli N, Ortega F, Cazeneuve C, Rubio RG, Luengo GS. Adsorption of poly(diallyldimethylammonium chloride)—sodium methyl-cocoyl-taurate complexes onto solid surfaces. Colloids Surf A Physicochem Eng Asp 2016. [DOI: 10.1016/j.colsurfa.2016.03.003] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|