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Polymers
Special Issues
Polyelectrolyte-Surfactant Systems: Current Advances and Future Perspectives
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Polyelectrolyte-Surfactant Systems: Current Advances and Future Perspectives

A special issue of Polymers (ISSN 2073-4360). This special issue belongs to the section "Polymer Physics and Theory".

Deadline for manuscript submissions: closed (30 April 2022) | Viewed by 4377

Special Issue Editors

Prof. Dr. Ksenija Kogej

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Guest Editor
Faculty of Chemistry and Chemical Technology, University of Ljubljana, SI-1000 Ljubljana, Slovenia
Interests: thermodynamic and transport properties of aqueous solutions of polyelectrolytes and surface active agents; interactions and structures in mixed polyelectrolyte-surfactant systems; complex colloid systems (associating polymers, micelles, vesicles, exosomes, drug delivery systems,…); application of static and dynamic light scattering for investigation of colloidal systems
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Rita Dias

E-Mail Website
Guest Editor
Biophysics and Medical Technology, Norwegian University of Science and Technology (NTNU), 7491 Trondheim, Norway
Interests: control of DNA condensation using cationic surfactants, polyelectrolytes and proteins; adsorption of macromolecules onto surfaces; nanoparticle - poly-acid interactions
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Per Hansson

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Guest Editor
Department of Medicinal Chemistry, Uppsala University, 752 36 Uppsala, Sweden
Interests: colloidal systems; polyelectrolytes; surfactant-polyelectrolyte systems; self-assembling properties of amphiphilic drugs in solutions and in hydrogels; drug formulations after injection into the subcutaneous tissue
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Mixtures of polyelectrolytes and surfactants are abundant in nature and technology. They combine properties of both surfactants and polyelectrolytes, which exhibit characteristic features already as individual groups. Surfactants have the ability to reduce surface tension and form self-assembled aggregates of various morphologies in aqueous solutions. In this way, they offer solubilization sites for hydrophobic molecules (e.g. drugs, dyes, etc.). Polyelectrolytes are most known as agents for flow and viscosity regulation of solutions, but are also ubiquitous in biological systems (e.g. nucleic acids and polysaccharides). Moreover, they exhibit strong electrostatic interactions with oppositely charged species, such as ionic surfactants, or with amphiphilic drugs. The mutual association of polyelectrolytes and surfactants is highly cooperative and leads to the formation of polyion-stabilized micelles, resulting in so-called polyelectrolyte-surfactant complexes (PESCs).

The behavior of polyelectrolyte-surfactant mixtures has been studied extensively over the years, ranging from studies of interactions in dilute aqueous solutions, to investigating phase behavior in more concentrated systems. A large emphasis has been given to structural features of the complexes, with the focus on either the effect of bound surfactant on polyelectrolyte properties (the polyelectrolyte-centered viewpoint) or vice-versa, the effect of the polyelectrolyte on micellization of surfactant (the surfactant-centered viewpoint). In the last years, also interfacial behavior (e.g. at the fluid-solid and fluid-gas interfaces) of PESCs has been studied widely.

The ionic self-assemblies of polyelectrolytes and oppositely charged surfactants have been used in a number of applications such as waste water treatment, oil recovery, drug formulations, cosmetics, surface coatings, preparation of colloidal particles with different functionalities etc. Furthermore, they can be exploited in preparation of hierarchically porous materials with well-defined morphologies that may be used in the fabrication of various polymeric supramolecular materials.

With the Special Issue Polyelectrolyte-Surfactant Systems: Current Advances and Future Perspectives we hope to show that this is an old but vibrant field. We are inviting you to submit a research paper, a review article or a perspective on the current advances and/or future perspectives on a topic within this wide research area.

Prof. Dr. Ksenija Kogej
Prof. Dr. Rita Dias
Prof. Dr. Per Hansson
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Polymers is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2700 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • polyelectrolytes
  • surfactants
  • polyelectrolyte-surfactant complexes
  • cooperative interactions
  • colloidal particles
  • structures
  • phase behavior
  • interfacial behavior
  • surface coatings

Published Papers (2 papers)

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Research

13 pages, 9733 KiB  
Article
Molecular Assembly in Block Copolymer-Surfactant Nanoparticle Dispersions: Information on Molecular Exchange and Apparent Solubility from High-Resolution and PFG NMR
by Guilherme A. Ferreira, Watson Loh, Daniel Topgaard, Olle Söderman and Lennart Piculell
Polymers 2021, 13(19), 3265; https://doi.org/10.3390/polym13193265 - 25 Sep 2021
Cited by 4 | Viewed by 1676
Abstract
Internally structured block copolymer-surfactant particles are formed when the complex salts of ionic-neutral block copolymers neutralized by surfactant counterions are dispersed in aqueous media. Here, we report the 1H NMR signal intensities and self-diffusion coefficients (D, from pulsed field gradient [...] Read more.
Internally structured block copolymer-surfactant particles are formed when the complex salts of ionic-neutral block copolymers neutralized by surfactant counterions are dispersed in aqueous media. Here, we report the 1H NMR signal intensities and self-diffusion coefficients (D, from pulsed field gradient nuclear magnetic resonance, PFG NMR) of trimethyl alkylammonium surfactant ions and the poly(acrylamide)-block-poly(acrylate) (PAAm-b-PA) polyions forming such particles. The results reveal the presence of an “NMR-invisible” (slowly exchanging) fraction of aggregated surfactant ions in the particle core and an “NMR-visible” fraction consisting of surface surfactant ions in rapid exchange with the surfactant ions dissociated into the aqueous domain. They also confirm that the neutral PAAm blocks are exposed to water at the particle surface, while the PA blocks are buried in the particle core. The self-diffusion of the polyions closely agree with the self-diffusion of a hydrophobic probe molecule solubilized in the particles, showing that essentially all copolymer chains are incorporated in the aggregates. Through centrifugation, we prepared macroscopically phase-separated systems with a phase concentrated in particles separated from a clear dilute phase. D values for the surfactant and block copolymer indicated that the dilute phase contained small aggregates (ca. 5 nm) of surfactant ions and a few anionic-neutral block copolymer chains. Regardless of the overall concentration of the sample, the fraction of block copolymer found in the dilute phase was nearly constant. This indicates that the dilute fraction represented a tail of small particles created by the dispersion process rather than a true thermodynamic solubility of the complex salts. Full article
(This article belongs to the Special Issue Polyelectrolyte-Surfactant Systems: Current Advances and Future Perspectives)
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14 pages, 1700 KiB  
Article
Mixed Micellization and Spectroscopic Studies of Anti-Allergic Drug and Non-Ionic Surfactant in the Presence of Ionic Liquid
by Naved Azum, Malik Abdul Rub and Abdullah M. Asiri
Polymers 2021, 13(16), 2756; https://doi.org/10.3390/polym13162756 - 17 Aug 2021
Cited by 12 | Viewed by 2075
Abstract
In drug delivery, surfactants are used to reduce side effects and to increase drug efficiency. The present work aimed to study the interaction of diphenhydramine hydrochloride (anti-allergic drug) with TX–45 (non-ionic surfactant) in the absence and presence of ionic liquid (1-hexyl-3-methylimidazolium chloride). The [...] Read more.
In drug delivery, surfactants are used to reduce side effects and to increase drug efficiency. The present work aimed to study the interaction of diphenhydramine hydrochloride (anti-allergic drug) with TX–45 (non-ionic surfactant) in the absence and presence of ionic liquid (1-hexyl-3-methylimidazolium chloride). The physicochemical parameters were estimated by the surface tension measurement. Various theoretical models (Clint, Rubingh, Motomura, and Maeda) were applied to determine the attractive behavior between drug and surfactant mixtures at the surface and in bulk. The drug and surfactant mixtures exhibit synergistic behavior in the absence and presence of ionic liquid. Several energetic parameters were also estimated with the assistance of regular solution approximation and pseudo phase separation model that indicate micelle formation and adsorption of surfactant at the surface is thermodynamically advantageous. The morphology of pure and mixture of amphiphiles has been estimated by the Tanford and Israelachvili theories. UV-visible spectroscopy was used to quantify the attractive behavior of the drug with surfactant with the help of a binding constant (K). Full article
(This article belongs to the Special Issue Polyelectrolyte-Surfactant Systems: Current Advances and Future Perspectives)
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