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Makarova AL, Kwiatkowski AL, Kuklin AI, Chesnokov YM, Philippova OE, Shibaev AV. Dual Semi-Interpenetrating Networks of Water-Soluble Macromolecules and Supramolecular Polymer-like Chains: The Role of Component Interactions. Polymers (Basel) 2024; 16:1430. [PMID: 38794623 PMCID: PMC11125886 DOI: 10.3390/polym16101430] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2024] [Revised: 05/06/2024] [Accepted: 05/16/2024] [Indexed: 05/26/2024] Open
Abstract
Dual networks formed by entangled polymer chains and wormlike surfactant micelles have attracted increasing interest in their application as thickeners in various fields since they combine the advantages of both polymer- and surfactant-based fluids. In particular, such polymer-surfactant mixtures are of great interest as novel hydraulic fracturing fluids with enhanced properties. In this study, we demonstrated the effect of the chemical composition of an uncharged polymer poly(vinyl alcohol) (PVA) and pH on the rheological properties and structure of its mixtures with a cationic surfactant erucyl bis(hydroxyethyl)methylammonium chloride already exploited in fracturing operations. Using a combination of several complementary techniques (rheometry, cryo-transmission electron microscopy, small-angle neutron scattering, and nuclear magnetic resonance spectroscopy), we showed that a small number of residual acetate groups (2-12.7 mol%) in PVA could significantly reduce the viscosity of the mixed system. This result was attributed to the incorporation of acetate groups in the corona of the micellar aggregates, decreasing the molecular packing parameter and thereby inducing the shortening of worm-like micelles. When these groups are removed by hydrolysis at a pH higher than 7, viscosity increases by five orders of magnitude due to the growth of worm-like micelles in length. The findings of this study create pathways for the development of dual semi-interpenetrating polymer-micellar networks, which are highly desired by the petroleum industry.
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Affiliation(s)
- Anna L. Makarova
- Faculty of Physics, Lomonosov Moscow State University, 119991 Moscow, Russia; (A.L.M.); (O.E.P.)
| | - Alexander L. Kwiatkowski
- Faculty of Physics, Lomonosov Moscow State University, 119991 Moscow, Russia; (A.L.M.); (O.E.P.)
| | | | - Yuri M. Chesnokov
- National Research Center, Kurchatov Institute, 123182 Moscow, Russia;
| | - Olga E. Philippova
- Faculty of Physics, Lomonosov Moscow State University, 119991 Moscow, Russia; (A.L.M.); (O.E.P.)
| | - Andrey V. Shibaev
- Faculty of Physics, Lomonosov Moscow State University, 119991 Moscow, Russia; (A.L.M.); (O.E.P.)
- Chemistry Department, Karaganda E.A. Buketov University, University Street 28, Karaganda 100028, Kazakhstan
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2
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Benitez-Llano CA, Florez-Acosta OA, Velasquez-Polo DD, Mesa-Arango AC, Zapata-Zapata C. Preparation, Physicochemical Characterization, and Stability Study of Lippia origanoides Essential Oil-based Nanoemulsion as a Topical Delivery System. Pharm Nanotechnol 2024; 12:251-261. [PMID: 37581527 DOI: 10.2174/2211738511666230815155614] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2023] [Revised: 06/02/2023] [Accepted: 06/07/2023] [Indexed: 08/16/2023]
Abstract
INTRODUCTION Fungal diseases are a priority in research, development, and health care, according to the WHO, mainly due to Candida spp. Essential oils (EOs) of the genus Lippia have demonstrated broad antimicrobial biological activity. Previous studies identified the anti-Candida potential of a thymol/p-cymene chemotype EO from Lippia origanoides H.B.K coded "0018". Nanoemulsions favor the biological activity of EOs and overcome limitations such as low solubility, instability against oxidizing agents, pH, light, and low permeability. To develop, characterize, and adjust a prototype of an O/W nanoemulsion containing the "0018" EO from Lippia origanoides for its evaluation in an in vitro permeability study. METHODS Nanoemulsions were obtained using a high energy high shear method. Their particle size distribution, Z potential, viscosity, pH, encapsulation efficiency (EE), thermodynamic stability and the Turbiscan Stability Index (TSI) were evaluated. The nanoemulsion prototype was adjusted to improve performance characteristics and microbiological efficacy. Thymol was used as an analyte in the EO quantification using UHPLC-DAD. RESULTS An O/W nanoemulsion with hydrodynamic diameter <200 nm and polydispersity index <0.3, EE >95%, with TSI < 1.5, anti-Candida albicans efficiency >95% was obtained; permeable with a flow of 6.0264 μg/cm2/h and permeability coefficient of 1.3170x10-3 cm/h. CONCLUSION A pharmaceutical formulation prototype is obtained that maintains the physical and physicochemical characteristics over time. Permeability is verified in an in-vitro model. It is proposed to evaluate its antifungal activity in preclinical or clinical studies as a contribution to the treatment of topical fungal diseases caused by Candida spp., through the use of biological resources and Colombian biodiversity.
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Affiliation(s)
- Carlos Andrés Benitez-Llano
- Department of Pharmacy, Group for the Design and Formulation of Medicines, Cosmetics and Related Products (DYFOMECO), Faculty of Pharmaceutical and Food Sciences, University of Antioquia, Medellín, Colombia
| | - Oscar Albeiro Florez-Acosta
- Department of Pharmacy, Group for the Design and Formulation of Medicines, Cosmetics and Related Products (DYFOMECO), Faculty of Pharmaceutical and Food Sciences, University of Antioquia, Medellín, Colombia
| | - Darsy Dayana Velasquez-Polo
- Department of Pharmacy, Group for the Design and Formulation of Medicines, Cosmetics and Related Products (DYFOMECO), Faculty of Pharmaceutical and Food Sciences, University of Antioquia, Medellín, Colombia
| | - Ana Cecilia Mesa-Arango
- Department of Mycology, Clinical Epidemiology Academic Group, Faculty of Medicine, University of Antioquia, Medellín, Colombia
| | - Carolina Zapata-Zapata
- Department of Mycology, Clinical Epidemiology Academic Group, Faculty of Medicine, University of Antioquia, Medellín, Colombia
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3
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Pal N, Alzahid Y, AlSofi AM, Ali M, Yekeen N, Hoteit H. An experimental workflow to assess the applicability of microemulsions for conformance improvement in oil-bearing reservoir. Heliyon 2023; 9:e17667. [PMID: 37539136 PMCID: PMC10395013 DOI: 10.1016/j.heliyon.2023.e17667] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2022] [Revised: 06/19/2023] [Accepted: 06/25/2023] [Indexed: 08/05/2023] Open
Abstract
A comprehensive workflow approach is necessary to link multiple experimental tasks and identify microemulsion (ME) formulations with 'optimal' stability, displacement behavior and technical feasibility in the petroleum industry. In this paper, a systematic approach is described with the aid of a case study which involves the formulation of an anionic sodium dodecyl sulfate-based microemulsion. The design of such ME systems requires a proper methodology, substantial laboratory work, and functional assessment from research/industrial viewpoints. The surfactant has been screened in terms of its micellization potential, followed by phase behavior analysis and Winsor classification of prepared microemulsions. The desired composition(s) are characterized via several tools to determine droplet size, morphology, oil/water solubilization potentials and salinity scan results. The suitability of the microemulsion system for conformance improvement technology (CIT) is proposed to be assessed via physicochemical evaluation studies encompassing two attributes: rheology and stability. For a favorable 'conforming' drive, the microemulsion must exhibit phase stability, sufficient injectivity, and moderate-to-high viscosity under shear. Technical assessment by the industry and research team must also include factors related to cost, availability of chemicals, environmental degradation, and reservoir considerations. The article demonstrates a comprehensive all-inclusive workflow methodology to design and formulate surfactant-stabilized microemulsions via case study analysis for application in CIT. This represents a sound approach to identifying efficient, cost-effective injection fluid systems and provides a framework to identify useful parameters for ME formulation design and employ the proposed (effective) strategy for conformance control.
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Affiliation(s)
- Nilanjan Pal
- Ali I. Al-Naimi Petroleum Engineering Research Center (ANPERC), Physical Science & Engineering Division, King Abdullah University of Science and Technology, Thuwal, Saudi Arabia
- Department of Petroleum Engineering & Earth Sciences, Indian Institute of Petroleum and Energy (IIPE), Visakhapatnam, India
| | - Yara Alzahid
- EXPEC Advanced Research Center, Saudi Aramco, Dhahran, Saudi Arabia
| | | | - Muhammad Ali
- Ali I. Al-Naimi Petroleum Engineering Research Center (ANPERC), Physical Science & Engineering Division, King Abdullah University of Science and Technology, Thuwal, Saudi Arabia
| | - Nurudeen Yekeen
- Department of Chemical and Petroleum Engineering, UCSI University, Kuala Lumpur 560000, Malaysia
| | - Hussein Hoteit
- Ali I. Al-Naimi Petroleum Engineering Research Center (ANPERC), Physical Science & Engineering Division, King Abdullah University of Science and Technology, Thuwal, Saudi Arabia
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4
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Blanco PM, Narambuena CF, Madurga S, Mas F, Garcés JL. Unusual Aspects of Charge Regulation in Flexible Weak Polyelectrolytes. Polymers (Basel) 2023; 15:2680. [PMID: 37376324 DOI: 10.3390/polym15122680] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2023] [Revised: 06/07/2023] [Accepted: 06/10/2023] [Indexed: 06/29/2023] Open
Abstract
This article reviews the state of the art of the studies on charge regulation (CR) effects in flexible weak polyelectrolytes (FWPE). The characteristic of FWPE is the strong coupling of ionization and conformational degrees of freedom. After introducing the necessary fundamental concepts, some unconventional aspects of the the physical chemistry of FWPE are discussed. These aspects are: (i) the extension of statistical mechanics techniques to include ionization equilibria and, in particular, the use of the recently proposed Site Binding-Rotational Isomeric State (SBRIS) model, which allows the calculation of ionization and conformational properties on the same foot; (ii) the recent progresses in the inclusion of proton equilibria in computer simulations; (iii) the possibility of mechanically induced CR in the stretching of FWPE; (iv) the non-trivial adsorption of FWPE on ionized surfaces with the same charge sign as the PE (the so-called "wrong side" of the isoelectric point); (v) the influence of macromolecular crowding on CR.
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Affiliation(s)
- Pablo M Blanco
- Physical Chemistry Unit, Materials Science and Physical Chemistry Department & Research Institute of Theoretical and Computational Chemistry (IQTCUB), Barcelona University (UB), 08028 Barcelona, Catalonia, Spain
| | - Claudio F Narambuena
- Grupo de Bionanotecnologia y Sistemas Complejos, Infap-CONICET & Facultad Regional San Rafael, Universidad Tecnológica Nacional, San Rafael 5600, Argentina
| | - Sergio Madurga
- Physical Chemistry Unit, Materials Science and Physical Chemistry Department & Research Institute of Theoretical and Computational Chemistry (IQTCUB), Barcelona University (UB), 08028 Barcelona, Catalonia, Spain
| | - Francesc Mas
- Physical Chemistry Unit, Materials Science and Physical Chemistry Department & Research Institute of Theoretical and Computational Chemistry (IQTCUB), Barcelona University (UB), 08028 Barcelona, Catalonia, Spain
| | - Josep L Garcés
- Chemistry Department, Technical School of Agricultural Engineering & AGROTECNIO, Lleida University (UdL), 25003 Lleida, Catalonia, Spain
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5
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Gradzielski M. Polyelectrolyte-Surfactant Complexes As a Formulation Tool for Drug Delivery. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:13330-13343. [PMID: 36278880 DOI: 10.1021/acs.langmuir.2c02166] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Aqueous polyelectrolyte-surfactant complexes (PESCs) are very rich with respect to their properties and the structures formed by them. By design they normally contain hydrophobic micellar surfactant aggregates complexed by long polyelectrolyte chains, thereby combining the formation of small hydrophobic domains given by the surfactant with large-scale structuring due to the presence of the polyelectrolyte chain. In addition, they contain highly polar regions of surfactant head groups in contact with polyelectrolyte, forming a shell around the micellar aggregates, which often also possesses a certain hydrophobic character. Accordingly, the ability for solubilization of water-insoluble compounds of different sorts is particularly versatile in PESCs. Their solubilization sites with very different polarities and hydrophobic characters make them very flexible in adapting to the requirements of a given drug molecule. This renders them attractive for potential applications in drug delivery. In addition, modification of the rheological properties via self-assembly and network formation can be very important in PESC applications. In the following, we discuss the structures of PESCs and their properties, with a focus on the solubilization properties. Subsequently, examples are described where PESCs have been employed in the context of drug solubilization and delivery. These comprise examples with individual aggregates, cross-linked hydrogels, and ones taking advantage of the high solubilization capacity of microemulsions.
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Affiliation(s)
- Michael Gradzielski
- Stranski-Laboratorium für Physikalische und Theoretische Chemie, Institut für Chemie, Technische Universität Berlin, Straße des 17. Juni 124 Sekr. TC 7, D-10623Berlin, Germany
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6
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Kwiatkowski AL, Molchanov VS, Kuklin AI, Orekhov AS, Arkharova NA, Philippova OE. Structural transformations of charged spherical surfactant micelles upon solubilization of water-insoluble polymer chains in salt-free aqueous solutions. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2021.118326] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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7
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Yu M, Guo X, Zhao W, Zhang K. Single-molecule studies reveal the distinction of strong and weak polyelectrolytes in aqueous solutions. Phys Chem Chem Phys 2021; 23:26130-26134. [PMID: 34734610 DOI: 10.1039/d1cp03572j] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Polyelectrolytes are an important class of functional polymers that have the advantages of both polymers and electrolytes due to the presence of charges, and have prospective applications in many fields. The charge of the backbone is an important factor affecting the properties of polyelectrolytes. Therefore, the complex interactions caused by the charges in polyelectrolyte solutions pose a challenge to the study of polyelectrolyte systems, and there is no consensus on the distinction between the behavior of strong and weak polyelectrolytes in solution. Based on single-molecule force spectroscopy (SMFS), the distinction of strong and weak polyelectrolytes is clarified for the first time at the single molecular level by comparing the single-chain elasticity in different environments. It is expected that the single-molecule study will provide the theoretical and experimental basis for the further application of polyelectrolytes.
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Affiliation(s)
- Miao Yu
- School of Mechanical Engineering, Sichuan University, Chengdu 610065, China. .,Innovation Method and Creative Design Key Laboratory of Sichuan Province, Chengdu 610065, China
| | - Xin Guo
- School of Mechanical Engineering, Sichuan University, Chengdu 610065, China. .,Innovation Method and Creative Design Key Laboratory of Sichuan Province, Chengdu 610065, China
| | - Wu Zhao
- School of Mechanical Engineering, Sichuan University, Chengdu 610065, China. .,Innovation Method and Creative Design Key Laboratory of Sichuan Province, Chengdu 610065, China
| | - Kai Zhang
- School of Mechanical Engineering, Sichuan University, Chengdu 610065, China. .,Innovation Method and Creative Design Key Laboratory of Sichuan Province, Chengdu 610065, China
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8
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Polyelectrolyte-nanoparticle mutual charge regulation and its influence on their complexation. Colloids Surf A Physicochem Eng Asp 2021. [DOI: 10.1016/j.colsurfa.2021.127258] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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9
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Prause A, Hörmann A, Cristiglio V, Smales GJ, Thünemann AF, Gradzielski M, Findenegg GH. Incorporation and structural arrangement of microemulsion droplets in cylindrical pores of mesoporous silica. Mol Phys 2021. [DOI: 10.1080/00268976.2021.1913255] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- Albert Prause
- Department of Chemistry, Technische Universität Berlin, Institut für Chemie, Berlin, Germany
| | - Anja Hörmann
- Department of Chemistry, Technische Universität Berlin, Institut für Chemie, Berlin, Germany
| | | | - Glen J. Smales
- Department of Materials Chemistry, Bundesanstalt für Materialforschung und -prüfung, Berlin, Germany
| | - Andreas F. Thünemann
- Department of Materials Chemistry, Bundesanstalt für Materialforschung und -prüfung, Berlin, Germany
| | - Michael Gradzielski
- Department of Chemistry, Technische Universität Berlin, Institut für Chemie, Berlin, Germany
| | - Gerhard H. Findenegg
- Department of Chemistry, Technische Universität Berlin, Institut für Chemie, Berlin, Germany
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10
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Kuzminskaya O, Hoffmann I, Clemens D, Gradzielski M. Viscosity of Polyelectrolyte Surfactant Complexes—The Importance of the Choice of the Polyelectrolyte Seen for the Case of PDADMAC Versus JR 400. Macromolecules 2021. [DOI: 10.1021/acs.macromol.1c00327] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Olga Kuzminskaya
- 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
| | - Ingo Hoffmann
- Institut Max von Laue-Paul Langevin (ILL), F-38042 Grenoble Cedex 9, 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
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11
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Gradzielski M, Duvail M, de Molina PM, Simon M, Talmon Y, Zemb T. Using Microemulsions: Formulation Based on Knowledge of Their Mesostructure. Chem Rev 2021; 121:5671-5740. [PMID: 33955731 DOI: 10.1021/acs.chemrev.0c00812] [Citation(s) in RCA: 45] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Microemulsions, as thermodynamically stable mixtures of oil, water, and surfactant, are known and have been studied for more than 70 years. However, even today there are still quite a number of unclear aspects, and more recent research work has modified and extended our picture. This review gives a short overview of how the understanding of microemulsions has developed, the current view on their properties and structural features, and in particular, how they are related to applications. We also discuss more recent developments regarding nonclassical microemulsions such as surfactant-free (ultraflexible) microemulsions or ones containing uncommon solvents or amphiphiles (like antagonistic salts). These new findings challenge to some extent our previous understanding of microemulsions, which therefore has to be extended to look at the different types of microemulsions in a unified way. In particular, the flexibility of the amphiphilic film is the key property to classify different microemulsion types and their properties in this review. Such a classification of microemulsions requires a thorough determination of their structural properties, and therefore, the experimental methods to determine microemulsion structure and dynamics are reviewed briefly, with a particular emphasis on recent developments in the field of direct imaging by means of electron microscopy. Based on this classification of microemulsions, we then discuss their applications, where the application demands have to be met by the properties of the microemulsion, which in turn are controlled by the flexibility of their amphiphilic interface. Another frequently important aspect for applications is the control of the rheological properties. Normally, microemulsions are low viscous and therefore enhancing viscosity has to be achieved by either having high concentrations (often not wished for) or additives, which do not significantly interfere with the microemulsion. Accordingly, this review gives a comprehensive account of the properties of microemulsions, including most recent developments and bringing them together from a united viewpoint, with an emphasis on how this affects the way of formulating microemulsions for a given application with desired properties.
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Affiliation(s)
- Michael Gradzielski
- Stranski-Laboratorium für Physikalische und Theoretische Chemie, Institut für Chemie, Technische Universität Berlin, D-10623 Berlin, Germany
| | - Magali Duvail
- ICSM, Université Montpellier, CEA, CNRS, ENSCM, 30207 Marcoule, France
| | - Paula Malo de Molina
- Centro de Física de Materiales (CFM) (CSIC-UPV/EHU)-Materials Physics Center (MPC), Paseo Manuel de Lardizabal 5, 20018 San Sebastián, Spain.,IKERBASQUE - Basque Foundation for Science, María Díaz de Haro 3, 48013 Bilbao, Spain
| | - Miriam Simon
- Stranski-Laboratorium für Physikalische und Theoretische Chemie, Institut für Chemie, Technische Universität Berlin, D-10623 Berlin, Germany.,Department of Chemical Engineering and the Russell Berrie Nanotechnolgy Inst. (RBNI), Technion-Israel Institute of Technology, Haifa, IL-3200003, Israel
| | - Yeshayahu Talmon
- Department of Chemical Engineering and the Russell Berrie Nanotechnolgy Inst. (RBNI), Technion-Israel Institute of Technology, Haifa, IL-3200003, Israel
| | - Thomas Zemb
- Stranski-Laboratorium für Physikalische und Theoretische Chemie, Institut für Chemie, Technische Universität Berlin, D-10623 Berlin, Germany.,ICSM, Université Montpellier, CEA, CNRS, ENSCM, 30207 Marcoule, France
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12
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Simon M, Gradzielski M, Hoffmann I. Dynamics in polyelectrolyte/microemulsion complexes. NANOSCALE ADVANCES 2020; 2:4722-4727. [PMID: 36132920 PMCID: PMC9419170 DOI: 10.1039/d0na00336k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/27/2020] [Accepted: 08/20/2020] [Indexed: 06/16/2023]
Abstract
Oil-in-water (O/W) microemulsion droplets are convenient carriers for hydrophobic molecules in an aqueous phase and are used for a wide range of applications. We studied weakly charged O/W microemulsion droplets complexed with oppositely charged polyacrylates that form long linear arrangements of droplets. All samples showed rather low viscosities, which is in contrast to similar systems of hydrophobically interconnected droplets. Here, we applied small-angle neutron scattering, dynamic light scattering and neutron spin-echo spectroscopy to characterise the dynamic properties of polyacrylate/microemulsion complexes in order to understand the origin of the low-viscous behaviour. We found that the electrostatic interactions lead to very dynamic complexes with high exchange rates of droplets and only a fraction of the droplets is contained within the transient complexes at a given time. These results were only accessible by the combination of different methods as one method alone would have given an incomplete picture.
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Affiliation(s)
- 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
| | - 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
| | - Ingo Hoffmann
- Institut Max von Laue-Paul Langevin (ILL) 71 avenue des Martyrs, CS 20156 F-38042 Grenoble Cedex 9 France
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13
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Magana JR, Sproncken CCM, Voets IK. On Complex Coacervate Core Micelles: Structure-Function Perspectives. Polymers (Basel) 2020; 12:E1953. [PMID: 32872312 PMCID: PMC7565781 DOI: 10.3390/polym12091953] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2020] [Revised: 08/24/2020] [Accepted: 08/26/2020] [Indexed: 12/31/2022] Open
Abstract
The co-assembly of ionic-neutral block copolymers with oppositely charged species produces nanometric colloidal complexes, known, among other names, as complex coacervates core micelles (C3Ms). C3Ms are of widespread interest in nanomedicine for controlled delivery and release, whilst research activity into other application areas, such as gelation, catalysis, nanoparticle synthesis, and sensing, is increasing. In this review, we discuss recent studies on the functional roles that C3Ms can fulfil in these and other fields, focusing on emerging structure-function relations and remaining knowledge gaps.
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Affiliation(s)
| | | | - Ilja K. Voets
- Laboratory of Self-Organizing Soft Matter, Department of Chemical Engineering and Chemistry and Institute for Complex Molecular Systems, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands; (J.R.M.); (C.C.M.S.)
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14
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Patel L, Mansour O, Bryant H, Abdullahi W, Dalgliesh RM, Griffiths PC. Interaction of Low Molecular Weight Poly(diallyldimethylammonium chloride) and Sodium Dodecyl Sulfate in Low Surfactant-Polyelectrolyte Ratio, Salt-Free Solutions. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2020; 36:8815-8825. [PMID: 32668905 DOI: 10.1021/acs.langmuir.0c01149] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Coacervation is widely used in formulations to induce a beneficial character to the formulation, but nonequilibrium effects are often manifest. Electrophoretic NMR (eNMR), pulsed-gradient spin-echo NMR (PGSE-NMR), and small-angle neutron scattering (SANS) have been used to quantify the interaction between low molecular cationic poly(diallyldimethylammonium chloride) (PDADMAC) and the anionic surfactant sodium dodecyl sulfate (SDS) in aqueous solution as a model for the precursor state to such nonequilibrium processes. The NMR data show that, within the low surfactant concentration one-phase region, an increasing surfactant concentration leads to a reduction in the charge on the polymer and a collapse of its solution conformation, attaining minimum values coincident with the macroscopic phase separation boundary. Interpretation of the scattering data reveals how the rodlike polymer changes over the same surfactant concentration window, with no discernible fingerprint of micellar type aggregates, but rather with the emergence of disklike and lamellar structures. At the highest surfactant concentration, the emergence of a weak Bragg peak in both the polymer and surfactant scattering suggests these precursor disk and lamellar structures evolve into paracrystalline stacks which ultimately phase separate. Addition of the nonionic surfactant hexa(ethylene glycol) monododecyl ether (C12E6) to the system seems to have little effect on the PDADMAC/SDS interaction as determined by NMR, merely displacing the observed behavior to lower SDS concentrations, commensurate with the total SDS present in the system. In other words, PDADMAC causes the disruption of the mixed SDS/C12E6 micelle, leading to SDS-rich PDADAMC/surfactant complexes coexisting with C12E6-rich micelles in solution.
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Affiliation(s)
- Leesa Patel
- Faculty of Engineering and Science, School of Science, University of Greenwich, Chatham, ME4 4TB, U.K
| | - Omar Mansour
- Faculty of Health and Life Sciences, Leicester School of Pharmacy, De Montfort University, The Gateway, Leicester, LE1 9BH, U.K
| | - Hannah Bryant
- Faculty of Engineering and Science, School of Science, University of Greenwich, Chatham, ME4 4TB, U.K
| | - Wasiu Abdullahi
- Faculty of Engineering and Science, School of Science, University of Greenwich, Chatham, ME4 4TB, U.K
| | - Robert M Dalgliesh
- ISIS Neutron and Muon Source, Science and Technology Facilities Council, Rutherford Appleton Laboratory, Didcot, Oxfordshire OX11 0QX, U.K
| | - Peter C Griffiths
- Faculty of Engineering and Science, School of Science, University of Greenwich, Chatham, ME4 4TB, U.K
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15
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Simon M, Schneck E, Noirez L, Rahn S, Davidovich I, Talmon Y, Gradzielski M. Effect of Polymer Architecture on the Phase Behavior and Structure of Polyelectrolyte/Microemulsion Complexes (PEMECs). Macromolecules 2020. [DOI: 10.1021/acs.macromol.0c00236] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Miriam Simon
- Stranski-Laboratorium für Physikalische und Theoretische Chemie, Institut für Chemie, Technische Universität Berlin, 10623 Berlin, Germany
| | - Emanuel Schneck
- Physics Department, Technische Universität Darmstadt, 64289 Darmstadt, Germany
| | - Laurence Noirez
- Laboratoire Léon Brillouin (CEA-CNRS), University of Paris-Saclay, CEA-Saclay, 91191 Gif-sur-Yvette, France
| | - Sofia Rahn
- Stranski-Laboratorium für Physikalische und Theoretische Chemie, Institut für Chemie, Technische Universität Berlin, 10623 Berlin, Germany
| | - Irina Davidovich
- Department of Chemical Engineering and the Russell Berrie Nanotechnology Institute (RBNI), Technion—Israel Institute of Technology, Haifa 3200003, Israel
| | - Yeshayahu Talmon
- Department of Chemical Engineering and the Russell Berrie Nanotechnology Institute (RBNI), Technion—Israel Institute of Technology, Haifa 3200003, Israel
| | - Michael Gradzielski
- Stranski-Laboratorium für Physikalische und Theoretische Chemie, Institut für Chemie, Technische Universität Berlin, 10623 Berlin, Germany
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Bali K, Varga Z, Kardos A, Mészáros R. Impact of local inhomogeneities on the complexation between poly(diallyldimethylammoniumchloride) and sodium dodecyl sulfate. Colloids Surf A Physicochem Eng Asp 2019. [DOI: 10.1016/j.colsurfa.2019.04.052] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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