1
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Cozzolino S, Gutfreund P, Vorobiev A, Devishvili A, Greaves A, Nelson A, Yepuri N, Luengo GS, Rutland MW. Mimicking the hair surface for neutron reflectometry. SOFT MATTER 2024; 20:7634-7645. [PMID: 39291556 DOI: 10.1039/d4sm00784k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/19/2024]
Abstract
The surface of human hair is normally hydrophobic as it is covered by a lipid layer, mainly composed of 18-methyleicosanoic acid (18-MEA). When the hair is damaged, this layer can be partially or fully removed and more hydrophilic, mainly negatively charged surfaces are formed with a wide variety of physical and chemical characteristics. The cosmetic industry is currently embracing the opportunity of increasing the sustainability of their hair-care products whilst improving product performance. To do this, it is vital to have a deeper understanding of the hair surface and how it interacts with hair-care ingredients. This work contributes to this by harnessing the potential of neutron reflectometry (NR) with scattering contrast variation to describe hierarchical adsorption. Three types of hair-mimetic surfaces have been produced: two "healthy hair" models to probe the role of lipid structure, and one "damaged hair" model, to consider the effect of the surface charge. Adsorption of hair-care ingredients has then been studied. The results for these relatively short lipid models indicate that a methyl branch has little effect on adsorption. The "damaged hair" studies, however, reveal the unexpected apparent adsorption of an anionic surfactant to a negative surface. This preferential adsorption of the otherwise solubilised neutral components demonstrates a facile route to selectively deliver a protective film on a damaged hair fibre, without the need for a cationic species. On a more general note, this study also demonstrates the feasibility of using NR to characterize such complex systems.
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Affiliation(s)
- Serena Cozzolino
- Division of Surface and Corrosion Science, School of Engineering Sciences in Chemistry, Biotechnology and Health, KTH Royal Institute of Technology, SE-100 44 Stockholm, Sweden.
- Institut Laue-Langevin, 71 avenue des Martyrs, CS 20156, 38042 Grenoble cedex 9, France
| | - Philipp Gutfreund
- Institut Laue-Langevin, 71 avenue des Martyrs, CS 20156, 38042 Grenoble cedex 9, France
| | - Alexei Vorobiev
- Institut Laue-Langevin, 71 avenue des Martyrs, CS 20156, 38042 Grenoble cedex 9, France
- Department of Physics and Astronomy, Materials Physics, Uppsala University, SE-751 20 Uppsala, Sweden
| | - Anton Devishvili
- Institut Laue-Langevin, 71 avenue des Martyrs, CS 20156, 38042 Grenoble cedex 9, France
- Department of Physics and Astronomy, Materials Physics, Uppsala University, SE-751 20 Uppsala, Sweden
| | - Andrew Greaves
- L'Oréal Research and Innovation, 1 avenue Eugène Schueller, 93600 Aulnay-sous-Bois, France.
| | - Andrew Nelson
- Australian Nuclear Science and Technology Organisation, Australian Centre for Neutron Scattering, New Illawarra Rd, Lucas Heights, New South Wales, Australia
| | - Nageshwar Yepuri
- Australian Nuclear Science and Technology Organisation, National Deuteration Facility, New Illawarra Rd, Lucas Heights, New South Wales, Australia
| | - Gustavo S Luengo
- L'Oréal Research and Innovation, 1 avenue Eugène Schueller, 93600 Aulnay-sous-Bois, France.
| | - Mark W Rutland
- Division of Surface and Corrosion Science, School of Engineering Sciences in Chemistry, Biotechnology and Health, KTH Royal Institute of Technology, SE-100 44 Stockholm, Sweden.
- Bioeconomy and Health Department, Materials and Surface Design, RISE Research Institutes of Sweden, SE-114 28 Stockholm, Sweden
- School of Chemistry, University of New South Wales, Sydney, NSW 2052, Australia
- Laboratoire de Tribologie et Dynamique des Systèmes, École Centrale de Lyon, 69134 Ecully CEDEX, France
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2
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Fernández-Peña L, Guzmán E, Fernández-Pérez C, Barba-Nieto I, Ortega F, Leonforte F, Rubio RG, Luengo GS. Study of the Dilution-Induced Deposition of Concentrated Mixtures of Polyelectrolytes and Surfactants. Polymers (Basel) 2022; 14:polym14071335. [PMID: 35406209 PMCID: PMC9003019 DOI: 10.3390/polym14071335] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2022] [Revised: 03/23/2022] [Accepted: 03/24/2022] [Indexed: 02/07/2023] Open
Abstract
Mixtures of polyelectrolytes and surfactants are commonly used in many technological applications where the challenge is to provide well-defined modifications of the surface properties, as is the case of washing formulations in cosmetics. However, if contemporary experimental and theoretical methods can provide insights on their behavior in concentrated formulations, less is known on their behavior under practical use conditions, e.g., under dilution and vectorization of deposits. This makes it difficult to make predictions for specific performance, as, for example, good hair manageability after a shampoo or a comfortable sensorial appreciation after a skin cleanser. This is especially important when considering the formulation of new, more eco-friendly formulations. In this work, a detailed study of the phase separation process induced by dilution is described, as well as the impact on the deposition of conditioning material on negatively charged surfaces. In order to gain a more detailed physical insight, several polyelectrolyte–surfactant pairs, formed by two different polymers and five surfactants that, although non-natural or eco-friendly, can be considered as models of classical formulations, have been studied. The results evidenced that upon dilution the behavior, and hence its deposition onto the surface, cannot be predicted in terms of the behavior of simpler pseudo-binary (mixtures of a polymer and a surfactant) or pseudo-ternary mixtures (two polymers and a surfactant). In many cases, phase separation was observed for concentrations similar to those corresponding to the components in some technological formulations, whereas the latter appeared as monophasic systems. Therefore, it may be assumed that the behavior in multicomponent formulations is the result of a complex interplay of synergistic interactions between the different components that will require revisiting when new, more eco-sustainable ingredients are considered.
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Affiliation(s)
- Laura Fernández-Peña
- Departamento de Química Física, Facultad de Ciencias Químicas, Universidad Complutense de Madrid, Ciudad Universitaria s/n, 28040 Madrid, Spain; (L.F.-P.); (C.F.-P.); (I.B.-N.); (F.O.)
- Centro de Espectroscopía y Correlación, Universidad Complutense de Madrid, Ciudad Universitaria s/n, 28040 Madrid, Spain
| | - Eduardo Guzmán
- Departamento de Química Física, Facultad de Ciencias Químicas, Universidad Complutense de Madrid, Ciudad Universitaria s/n, 28040 Madrid, Spain; (L.F.-P.); (C.F.-P.); (I.B.-N.); (F.O.)
- Instituto Pluridisciplinar, Universidad Complutense de Madrid, Paseo Juan XXIII 1, 28040 Madrid, Spain
- Correspondence: (E.G.); (R.G.R.); (G.S.L.)
| | - Coral Fernández-Pérez
- Departamento de Química Física, Facultad de Ciencias Químicas, Universidad Complutense de Madrid, Ciudad Universitaria s/n, 28040 Madrid, Spain; (L.F.-P.); (C.F.-P.); (I.B.-N.); (F.O.)
| | - Irene Barba-Nieto
- Departamento de Química Física, Facultad de Ciencias Químicas, Universidad Complutense de Madrid, Ciudad Universitaria s/n, 28040 Madrid, Spain; (L.F.-P.); (C.F.-P.); (I.B.-N.); (F.O.)
| | - Francisco Ortega
- Departamento de Química Física, Facultad de Ciencias Químicas, Universidad Complutense de Madrid, Ciudad Universitaria s/n, 28040 Madrid, Spain; (L.F.-P.); (C.F.-P.); (I.B.-N.); (F.O.)
- Instituto Pluridisciplinar, Universidad Complutense de Madrid, Paseo Juan XXIII 1, 28040 Madrid, Spain
| | - Fabien Leonforte
- L’Oréal Research and Innovation, 1 Avenue Eugène Schueller, 93600 Aulnay-Sous-Bois, France;
| | - Ramón G. Rubio
- Departamento de Química Física, Facultad de Ciencias Químicas, Universidad Complutense de Madrid, Ciudad Universitaria s/n, 28040 Madrid, Spain; (L.F.-P.); (C.F.-P.); (I.B.-N.); (F.O.)
- Instituto Pluridisciplinar, Universidad Complutense de Madrid, Paseo Juan XXIII 1, 28040 Madrid, Spain
- Correspondence: (E.G.); (R.G.R.); (G.S.L.)
| | - Gustavo S. Luengo
- L’Oréal Research and Innovation, 1 Avenue Eugène Schueller, 93600 Aulnay-Sous-Bois, France;
- Correspondence: (E.G.); (R.G.R.); (G.S.L.)
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Adsorption of Mixtures of a Pegylated Lipid with Anionic and Zwitterionic Surfactants at Solid/Liquid. COLLOIDS AND INTERFACES 2020. [DOI: 10.3390/colloids4040047] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
This work explores the association of a pegylated lipid (DSPE-PEG) with different anionic and zwitterionic surfactants (pseudo-binary and pseudo-ternary polymer+ surfactant mixtures), and the adsorption of the polymer + surfactant aggregates onto negatively charged surfaces, with a surface charge density similar to that existing on the damaged hair epicuticle. Dynamic light scattering and zeta potential measurements shows that, in solution, the polymer + surfactant association results from an intricate balance between electrostatic and hydrophobic interactions, which leads to the formation of at least two different types of micellar-like polymer + surfactant aggregates. The structure and physicochemical properties of such aggregates were found strongly dependent on the specific nature and concentration of the surfactant. The adsorption of the polymer + surfactant aggregates onto negatively charged surface was studied using a set of surface-sensitive techniques (quartz crystal microbalance with dissipation monitoring, ellipsometry and Atomic Force Microscopy), which allows obtaining information about the adsorbed amount, the water content of the layers and the topography of the obtained films. Ion-dipole interactions between the negative charges of the surface and the oxyethylene groups of the polymer + surfactant aggregates appear as the main driving force of the deposition process. This is strongly dependent on the surfactant nature and its concentration, with the impact of the latter on the adsorption being especially critical when anionic surfactant are incorporated within the aggregates. This study opens important perspectives for modulating the deposition of a poorly interacting polymer onto negatively charged surfaces, which can impact in the fabrication on different aspects with technological and industrial interest.
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Hopa DY, Fatehi P. Using Sulfobutylated and Sulfomethylated Lignin as Dispersant for Kaolin Suspension. Polymers (Basel) 2020; 12:polym12092046. [PMID: 32911748 PMCID: PMC7570282 DOI: 10.3390/polym12092046] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2020] [Revised: 08/31/2020] [Accepted: 09/03/2020] [Indexed: 11/23/2022] Open
Abstract
Kraft lignin is an abundant natural resource, but it is underutilized. In this study, sulfoalkylated lignin derivatives with similar charge densities but with different alkyl chain length were produced via sulfobutylation and sulfomethylation reactions. The contact angle studies revealed that sulfobutylated lignin (SBL) with longer alkyl chains had a higher hydrophobicity than sulfomethylated lignin (SML) did. The adsorption behavior of sulfoalkylated lignins was studied using a Quartz crystal microbalance with dissipation (QCM-D) on Al2O3 coated surface as representative of positively charged sites of kaolin particles. The results of adsorption studies showed that SBL deposited more greatly than SML did on the Al2O3 surface, and it generated a thicker but less viscoelastic adlayer on the surface. The adlayer thickness and configuration of molecules on the surface were also related to the zeta potential and stabilization performance of the polymers in the kaolin suspension system. The results also confirmed that both lignin derivatives were very effective in dispersing kaolin particles at neutral pH, and their effectiveness was hampered under alkaline or acidic pH.
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Affiliation(s)
- Derya Yesim Hopa
- Department of Chemical Engineering, Lakehead University, Thunder Bay, ON P7B 5E1, Canada;
- Department of Chemical Engineering, Afyon Kocatepe University, Afyonkarahisar 03200, Turkey
| | - Pedram Fatehi
- Department of Chemical Engineering, Lakehead University, Thunder Bay, ON P7B 5E1, Canada;
- State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, China
- Correspondence: ; Tel.: +1-807-343-8697; Fax: +1-807-346-7943
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5
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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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6
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Guzmán E, Fernández-Peña L, Ortega F, Rubio RG. Equilibrium and kinetically trapped aggregates in polyelectrolyte–oppositely charged surfactant mixtures. Curr Opin Colloid Interface Sci 2020. [DOI: 10.1016/j.cocis.2020.04.002] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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7
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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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8
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Abstract
Most of the currently used products for repairing and conditioning hair rely on the deposition of complex formulations, based on mixtures involving macromolecules and surfactants, onto the surface of hair fibers. This leads to the partial covering of the damaged areas appearing in the outermost region of capillary fibers, which enables the decrease of the friction between fibers, improving their manageability and hydration. The optimization of shampoo and conditioner formulations necessitates a careful examination of the different physicochemical parameters related to the conditioning mechanism, e.g., the thickness of the deposits, its water content, topography or frictional properties. This review discusses different physicochemical aspects which impact the understanding of the most fundamental bases of the conditioning process.
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9
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Najafi H, Jerri HA, Valmacco V, Petroff MG, Hansen C, Benczédi D, Bevan MA. Synergistic Polymer-Surfactant-Complex Mediated Colloidal Interactions and Deposition. ACS APPLIED MATERIALS & INTERFACES 2020; 12:14518-14530. [PMID: 32125138 DOI: 10.1021/acsami.9b21405] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Total internal reflection microscopy (TIRM) is used to directly, sensitively, and simultaneously measure colloidal interactions, dynamics, and deposition for a broad range of polymer-surfactant compositions. A deposition state diagram containing comprehensive information about particle interactions, trajectories, and deposition behavior is obtained for polymer-surfactant compositions covering four decades in both polymer and surfactant concentrations. Bulk polymer-surfactant phase behavior and surface properties are characterized to provide additional information to interpret mechanisms. Materials investigated include cationic acrylamide-acrylamidopropyltrimonium copolymer (AAC), sodium lauryl ether sulfate (SLES) surfactant, silica colloids, and glass microscope slides. Measured colloid-substrate interaction potentials and deposition behavior show nonmonotonic trends vs polymer-surfactant composition and appear to be synergistic in the sense that they are not easily explained as the superposition of single-component-mediated interactions. Broad findings show that at some compositions polymer-surfactant complexes mediate bridging and depletion attractions that promote colloidal deposition, whereas other compositions produce electrosteric repulsion that deters colloidal deposition. These findings illustrate mechanisms underlying colloid-surface interactions in polymer-surfactant mixtures, which are important to controlling selective colloidal deposition in multicomponent formulation applications.
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Affiliation(s)
- Helya Najafi
- Chemical & Biomolecular Engineering, Johns Hopkins University, Baltimore, Maryland 21218, United States
| | - Huda A Jerri
- R&D Division, Firmenich Inc., Plainsboro, New Jersey 08536, United States
| | - Valentina Valmacco
- Corporate Research Division, Firmenich SA, Meyrin 2, Geneva 1217, Switzerland
| | - Matthew G Petroff
- Chemical & Biomolecular Engineering, Johns Hopkins University, Baltimore, Maryland 21218, United States
| | - Christopher Hansen
- R&D Division, Firmenich Inc., Plainsboro, New Jersey 08536, United States
| | - Daniel Benczédi
- Corporate Research Division, Firmenich SA, Meyrin 2, Geneva 1217, Switzerland
| | - Michael A Bevan
- Chemical & Biomolecular Engineering, Johns Hopkins University, Baltimore, Maryland 21218, United States
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Guzmán E, Llamas S, Fernández-Peña L, Léonforte F, Baghdadli N, Cazeneuve C, Ortega F, Rubio RG, Luengo GS. Effect of a natural amphoteric surfactant in the bulk and adsorption behavior of polyelectrolyte-surfactant mixtures. Colloids Surf A Physicochem Eng Asp 2020. [DOI: 10.1016/j.colsurfa.2019.124178] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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11
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Fernández-Peña L, Guzmán E, Leonforte F, Serrano-Pueyo A, Regulski K, Tournier-Couturier L, Ortega F, Rubio RG, Luengo GS. Effect of molecular structure of eco-friendly glycolipid biosurfactants on the adsorption of hair-care conditioning polymers. Colloids Surf B Biointerfaces 2019; 185:110578. [PMID: 31678812 DOI: 10.1016/j.colsurfb.2019.110578] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2019] [Revised: 09/13/2019] [Accepted: 10/10/2019] [Indexed: 11/17/2022]
Abstract
Pseudo-binary mixtures of different glycolipids, four different rhamnolipids (RL) and an alkyl polyglucoside (APG), with poly(diallyl-dimethylammonium chloride) (PDADMAC) have been studied in relation to their adsorption onto negatively charged surfaces to shed light on the impact of the molecular structure of surfactants from natural sources (instead of synthetic surfactant, such as sodium laureth sulfate) on the adsorption of hair-conditioning polymers. For this purpose, the self-assembly of such mixtures in aqueous solution and their adsorption onto negatively charged surfaces mimicking the negative charge of damaged hair fibres have been studied combining experiments and self-consistent field (SCF) calculations. The results show that the specific physico-chemical properties of the surfactants (charge, number of sugar rings present in surfactant structure and length of the hydrocarbon length) play a main role in the control of the adsorption process, with the adsorption efficiency and hydration being improved in relation to conventional sulfate-based systems for mixtures of PDADMAC and glycolipids with the shortest alkyl chains. SCF calculations and Energy Dispersive X-Ray Spectroscopy (EDS) analysis on real hair confirmed such observations. The results allow one to assume that the characteristic of the surfactants, especially rhamnolipids, conditions positively the adsorption potential of polyelectrolytes in these model systems. This study provides important insights on the mechanisms underlying the performance of more complex but eco-friendly washing formulations.
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Affiliation(s)
- Laura Fernández-Peña
- Departamento de Química Física, Facultad de Ciencias Químicas Universidad Complutense de Madrid, Ciudad Universitaria s/n, 28040, Madrid, Spain
| | - Eduardo Guzmán
- Departamento de Química Física, Facultad de Ciencias Químicas Universidad Complutense de Madrid, Ciudad Universitaria s/n, 28040, Madrid, Spain; Instituto Pluridisciplinar, Universidad Complutense de Madrid, Paseo Juan XXIII, 1, 28040, Madrid, Spain.
| | | | - Ana Serrano-Pueyo
- Departamento de Química Física, Facultad de Ciencias Químicas Universidad Complutense de Madrid, Ciudad Universitaria s/n, 28040, Madrid, Spain
| | | | | | - Francisco Ortega
- Departamento de Química Física, Facultad de Ciencias Químicas 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, Facultad de Ciencias Químicas Universidad Complutense de Madrid, Ciudad Universitaria s/n, 28040, Madrid, Spain; Instituto Pluridisciplinar, Universidad Complutense de Madrid, Paseo Juan XXIII, 1, 28040, Madrid, Spain.
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12
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Bali K, Varga Z, Kardos A, Varga I, Gilányi T, Domján A, Wacha A, Bóta A, Mihály J, Mészáros R. Effect of Dilution on the Nonequilibrium Polyelectrolyte/Surfactant Association. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:14652-14660. [PMID: 30395475 DOI: 10.1021/acs.langmuir.8b03255] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Polyelectrolyte (PE)/surfactant (S) mixtures play a distinguished role in the efficacy of shampoos and toiletries primarily due to the deposition of PE/S precipitates on the hair surface upon dilution of the formulations. The classical interpretation of this phenomenon is a simple composition change during which the system enters the two-phase region. Recent studies, however, indicated that the phase properties of PE/S mixtures could be strongly affected by the applied solution preparation protocols. In the present work, we aimed at studying the impact of dilution on the nonequilibrium aggregate formation in the sodium poly(styrenesulfonate) (NaPSS)/dodecyltrimethylammonium bromide (DTAB)/NaCl system. Mixtures prepared with hundredfold dilution of concentrated NaPSS/DTAB/NaCl solutions in water were compared with those ones made by rapid mixing of dilute NaPSS/NaCl and DTAB/NaCl solutions. The study revealed that the phase-separation concentration range as well as the composition, morphology, and visual appearance of the precipitates were remarkably different in the two cases. These observations clearly demonstrate that the dilution/deposition process is also related to the nonequilibrium phase properties of PE/S systems, which can be used to modulate the efficiency of various commercial applications.
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Affiliation(s)
- Krisztina Bali
- Laboratory of Interfaces and Nanosized Systems, Institute of Chemistry , ELTE Eötvös Loránd University , Pázmány Péter sétány 1/A , H-1117 Budapest , Hungary
| | - Zsófia Varga
- Laboratory of Interfaces and Nanosized Systems, Institute of Chemistry , ELTE Eötvös Loránd University , Pázmány Péter sétány 1/A , H-1117 Budapest , Hungary
| | - Attila Kardos
- Department of Chemistry , University J. Selyeho , 945 01 Komárno , Slovakia
| | - Imre Varga
- Laboratory of Interfaces and Nanosized Systems, Institute of Chemistry , ELTE Eötvös Loránd University , Pázmány Péter sétány 1/A , H-1117 Budapest , Hungary
| | - Tibor Gilányi
- Laboratory of Interfaces and Nanosized Systems, Institute of Chemistry , ELTE Eötvös Loránd University , Pázmány Péter sétány 1/A , H-1117 Budapest , Hungary
| | | | | | | | | | - Róbert Mészáros
- Laboratory of Interfaces and Nanosized Systems, Institute of Chemistry , ELTE Eötvös Loránd University , Pázmány Péter sétány 1/A , H-1117 Budapest , Hungary
- Department of Chemistry , University J. Selyeho , 945 01 Komárno , Slovakia
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13
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Kou R, Zhang J, Chen Z, Liu G. Counterion Specificity of Polyelectrolyte Brushes: Role of Specific Ion-Pairing Interactions. Chemphyschem 2018; 19:1404-1413. [PMID: 29575481 DOI: 10.1002/cphc.201701256] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2017] [Indexed: 11/10/2022]
Abstract
We demonstrate here that the properties of poly (2-(methacryloyloxy) ethyl trimethylammonium chloride) brushes can be tuned by counterion species. When the brushes are exposed to external chloride (Cl- ) counterions, obvious dehydration and collapse are only observed at high salt concentrations. In the presence of very strongly chaotropic perchlorate (ClO4- ), the brushes strongly dehydrate and collapse at a very low salt concentration. For the strongly chaotropic thiocyanate ion (SCN- ), the changes in hydration and conformation of the brushes are similar to those observed for ClO4- but at a smaller extent at very low salt concentrations. With the addition of kosmotropic acetate (Ac- ), hydration of the brushes increases, accompanied by a swelling of the brushes in the low-salt-concentration regime. In contrast, the brushes dehydrate and collapse with increasing concentration of Ac- in the high-salt-concentration regime. The counterion specificity of the brushes demonstrated here is determined by specific ion-pairing interactions through modulating the osmotic pressure within the brushes and the hydrophobicity of the ion pairs.
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Affiliation(s)
- Ran Kou
- Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemical Physics, University of Science and Technology of China, Hefei, 230026, P. R. China
| | - Jian Zhang
- Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemical Physics, University of Science and Technology of China, Hefei, 230026, P. R. China
| | - Zhen Chen
- Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemical Physics, University of Science and Technology of China, Hefei, 230026, P. R. China
| | - Guangming Liu
- Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemical Physics, University of Science and Technology of China, Hefei, 230026, P. R. China
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Zhu Y, Gao Y, Zhang C, Zhao X, Ma Y, Du F. Static and dynamic wetting behavior of TX-100 solution on super-hydrophobic rice ( Oryza sativa. ) leaf surfaces. Colloids Surf A Physicochem Eng Asp 2018. [DOI: 10.1016/j.colsurfa.2018.03.008] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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Lee PF, Chau E, Cabello R, Yeh AT, Sampaio LC, Gobin AS, Taylor DA. Inverted orientation improves decellularization of whole porcine hearts. Acta Biomater 2017; 49:181-191. [PMID: 27884776 DOI: 10.1016/j.actbio.2016.11.047] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2016] [Revised: 11/14/2016] [Accepted: 11/20/2016] [Indexed: 12/11/2022]
Abstract
In structurally heterogeneous organs, such as heart, it is challenging to retain extracellular matrix integrity in the thinnest regions (eg, valves) during perfusion decellularization and completely remove cellular debris from thicker areas. The high inflow rates necessary to maintain physiologic pressure can distend or damage thin tissues, but lower pressures prolong the process and increase the likelihood of contamination. We examined two novel retrograde decellularization methods for porcine hearts: inverting the heart or venting the apex to decrease inflow rate. We measured flow dynamics through the aorta (Ao) and pulmonary artery (PA) at different Ao pressures and assessed the heart's appearance, turbidity of the outflow solutions, and coronary perfusion efficiency. We used rectangle image fitting of decellularized heart images to obtain a heart shape index. Using nonlinear optical microscopy, we determined the microstructure of collagen and elastin fibers of the aortic valve cusps. DNA, glycosaminoglycan, and residual detergent levels were compared. The inverted method was superior to the vented method, as shown by a higher coronary perfusion efficiency, more cell debris outflow, higher collagen and elastin content inside the aortic valve, lower DNA content, and better retention of the heart shape after decellularization. To our knowledge, this is the first study to use flow dynamics in a whole heart throughout the decellularization procedure to provide real-time information about the success of the process and the integrity of the vulnerable regions of the matrix. Heart orientation was important in optimizing decellularization efficiency and maintaining extracellular matrix integrity. STATEMENT OF SIGNIFICANCE The use of decellularized tissue as a suitable scaffold for engineered tissue has emerged over the past decade as one of the most promising biofabrication platforms. The decellularization process removes all native cells, leaving the natural biopolymers, extracellular matrix materials and native architecture intact. This manuscript describes heart orientation as important in optimizing decellularization efficiency and maintaining extracellular matrix integrity. To our knowledge, this is the first study to assess flow dynamics in a whole heart throughout the decellularization procedure. Our findings compared to currently published methods demonstrate that continuous complex real-time measurements and analyses are required to produce an optimal scaffold for cardiac regeneration.
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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.
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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]
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Dhopatkar N, Defante AP, Dhinojwala A. Ice-like water supports hydration forces and eases sliding friction. SCIENCE ADVANCES 2016; 2:e1600763. [PMID: 27574706 PMCID: PMC5001812 DOI: 10.1126/sciadv.1600763] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/10/2016] [Accepted: 07/29/2016] [Indexed: 05/22/2023]
Abstract
The nature of interfacial water is critical in several natural processes, including the aggregation of lipids into the bilayer, protein folding, lubrication of synovial joints, and underwater gecko adhesion. The nanometer-thin water layer trapped between two surfaces has been identified to have properties that are very different from those of bulk water, but the molecular cause of such discrepancy is often undetermined. Using surface-sensitive sum frequency generation (SFG) spectroscopy, we discover a strongly coordinated water layer confined between two charged surfaces, formed by the adsorption of a cationic surfactant on the hydrophobic surfaces. By varying the adsorbed surfactant coverage and hence the surface charge density, we observe a progressively evolving water structure that minimizes the sliding friction only beyond the surfactant concentration needed for monolayer formation. At complete surfactant coverage, the strongly coordinated confined water results in hydration forces, sustains confinement and sliding pressures, and reduces dynamic friction. Observing SFG signals requires breakdown in centrosymmetry, and the SFG signal from two oppositely oriented surfactant monolayers cancels out due to symmetry. Surprisingly, we observe the SFG signal for the water confined between the two charged surfactant monolayers, suggesting that this interfacial water layer is noncentrosymmetric. The structure of molecules under confinement and its macroscopic manifestation on adhesion and friction have significance in many complicated interfacial processes prevalent in biology, chemistry, and engineering.
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da Palma RK, Campillo N, Uriarte JJ, Oliveira LVF, Navajas D, Farré R. Pressure- and flow-controlled media perfusion differently modify vascular mechanics in lung decellularization. J Mech Behav Biomed Mater 2015; 49:69-79. [PMID: 26002417 DOI: 10.1016/j.jmbbm.2015.04.024] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2015] [Revised: 04/18/2015] [Accepted: 04/23/2015] [Indexed: 01/07/2023]
Abstract
Organ biofabrication is a potential future alternative for obtaining viable organs for transplantation. Achieving intact scaffolds to be recellularized is a key step in lung bioengineering. Perfusion of decellularizing media through the pulmonary artery has shown to be effective. How vascular perfusion pressure and flow vary throughout lung decellularization, which is not well known, is important for optimizing the process (minimizing time) while ensuring scaffold integrity (no barotrauma). This work was aimed at characterizing the pressure/flow relationship at the pulmonary vasculature and at how effective vascular resistance depends on pressure- and flow-controlled variables when applying different methods of media perfusion for lung decellularization. Lungs from 43 healthy mice (C57BL/6; 7-8 weeks old) were investigated. After excision and tracheal cannulation, lungs were inflated at 10 cmH2O airway pressure and subjected to conventional decellularization with a solution of 1% sodium dodecyl sulfate (SDS). Pressure (PPA) and flow (V'PA) at the pulmonary artery were continuously measured. Decellularization media was perfused through the pulmonary artery: (a) at constant PPA=20 cmH2O or (b) at constant V'PA=0.5 and 0.2 ml/min. Effective vascular resistance was computed as Rv=PPA/V'PA. Rv (in cmH2O/(ml/min)); mean±SE) considerably varied throughout lung decellularization, particularly for pressure-controlled perfusion (from 29.1±3.0 in baseline to a maximum of 664.1±164.3 (p<0.05), as compared with flow-controlled perfusion (from 49.9±3.3 and 79.5±5.1 in baseline to a maximum of 114.4±13.9 and 211.7±70.5 (p<0.05, both), for V'PA of 0.5 and 0.2 ml/min respectively. Most of the media infused to the pulmonary artery throughout decellularization circulated to the airways compartment across the alveolar-capillary membrane. This study shows that monitoring perfusion mechanics throughout decellularization provides information relevant for optimizing the process time while ensuring that vascular pressure is kept within a safety range to preserve the organ scaffold integrity.
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Affiliation(s)
- Renata K da Palma
- Unitat Biofísica i Bioenginyeria, Facultat de Medicina, Universitat de Barcelona, Barcelona, Spain; Master's and Doctoral Degree Programs in Rehabilitation Sciences, Nove de Julho University, Sao Paulo, Brazil
| | - Noelia Campillo
- Unitat Biofísica i Bioenginyeria, Facultat de Medicina, Universitat de Barcelona, Barcelona, Spain; Institut de Bioenginyeria de Catalunya, Barcelona, Spain
| | - Juan J Uriarte
- Unitat Biofísica i Bioenginyeria, Facultat de Medicina, Universitat de Barcelona, Barcelona, Spain; CIBER Enfermedades Respiratorias, Madrid, Spain
| | - Luis V F Oliveira
- Master's and Doctoral Degree Programs in Rehabilitation Sciences, Nove de Julho University, Sao Paulo, Brazil
| | - Daniel Navajas
- Unitat Biofísica i Bioenginyeria, Facultat de Medicina, Universitat de Barcelona, Barcelona, Spain; Institut de Bioenginyeria de Catalunya, Barcelona, Spain; CIBER Enfermedades Respiratorias, Madrid, Spain
| | - Ramon Farré
- Unitat Biofísica i Bioenginyeria, Facultat de Medicina, Universitat de Barcelona, Barcelona, Spain; CIBER Enfermedades Respiratorias, Madrid, Spain; Institut Investigacions Biomediques August Pi Sunyer, Barcelona, Spain.
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