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Applications of Micellar Solutions
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Applications of Micellar Solutions

A special issue of Molecules (ISSN 1420-3049). This special issue belongs to the section "Applied Chemistry".

Deadline for manuscript submissions: closed (31 December 2022) | Viewed by 11030

Special Issue Editors

Dr. Vasyl M. Haramus

E-Mail Website
Guest Editor
Powder Based Materials Development Department, Institute of Metallic Biomaterials, Helmholtz-Zentrum Hereon, Bldg. 47, R.317, Max-Planck-Straße 1, 21502 Geesthacht, Germany
Interests: surfactants, polymers and nanoparticles in solution; nanocarriers for controlled and targeted release of drugs; materials with drug-device functions; small angle scattering
Special Issues, Collections and Topics in MDPI journals
Dr. Viktor Petrenko

E-Mail Website
Guest Editor
BCMaterials, Basque Centre for Materials, Applications and Nanostructures, UPV/EHU Science Park, Leioa, Spain
Interests: small-angle neutron scattering; structure characterization; colloidal solutions; micelles

Special Issue Information

Dear Colleagues,

This Special Issue is related to the micelles and its complex composites for various kinds of applications.

Solutions of surfactant micelles are a hot topic in modern research in molecular physics, physical chemistry, biophysics, medicine, and some other academic disciplines. Considerable attention to the systems with self-organization and recognition phenomena is associated, first of all, with unique properties of nano-sized micelles and their complexes in bulk and at interface. Micelles can vary size, shape, and charge depending to the molecular composition of solution and external parameters. Systems with micelles find wide application in various industrial sectors, such as pharmaceutics, cosmetics, oil production, and food technology.

Researchers working in the field connected to micelles are cordially invited to contribute original research papers (experiments, theoretical calculations, and modelling) or reviews to this Special Issue of Molecules, which report on the design, synthesis, structure characterization, and evaluation of novel materials with surfactants for various applications.

Dr. Vasyl M. Haramus
Dr. Viktor Petrenko
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. Molecules 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

  • micellar solutions
  • complex composites with surfactants
  • structure investigation of micelles
  • surfactants related materials at the surface
  • applied research with micelles
  • behavior of surfactants and polymers
  • multicomponents systems with nanoparticles and micelles
  • systems with self-organization in bulk and at interfaces
  • recognition ability of micelles

Published Papers (5 papers)

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Research

14 pages, 1738 KiB  
Article
Micelle Formation in Aqueous Solutions of the Cholesterol-Based Detergent Chobimalt Studied by Small-Angle Scattering
by Oleksandr P. Artykulnyi, Katarina Siposova, Manfred Kriechbaum, Andrey Musatov, László Almásy and Viktor Petrenko
Molecules 2023, 28(4), 1811; https://doi.org/10.3390/molecules28041811 - 14 Feb 2023
Viewed by 1772
Abstract
The structure and interaction parameters of the water-soluble cholesterol-based surfactant, Chobimalt, are investigated by small-angle neutron and X-ray scattering techniques. The obtained data are analyzed by a model-independent approach applying the inverse Fourier transformation procedure as well as considering a model fitting procedure, [...] Read more.
The structure and interaction parameters of the water-soluble cholesterol-based surfactant, Chobimalt, are investigated by small-angle neutron and X-ray scattering techniques. The obtained data are analyzed by a model-independent approach applying the inverse Fourier transformation procedure as well as considering a model fitting procedure, using a core-shell form factor and hard-sphere structure factor. The analysis reveals the formation of the polydisperse spherical or moderately elongated ellipsoidal shapes of the Chobimalt micelles with the hard sphere interaction in the studied concentration range 0.17–6.88 mM. The aggregation numbers are estimated from the micelle geometry observed by small-angle scattering and are found to be in the range of 200–300. The low pH of the solution does not have a noticeable effect on the structure of the Chobimalt micelles. The critical micelle concentrations of the synthetic surfactant Chobimalt in water and in H2O-HCl solutions were obtained according to fluorescence measurements as ~3 μM and ~2.5 μM, respectively. In-depth knowledge of the basic structural properties of the detergent micelles is necessary for further applications in bioscience and biotechnology. Full article
(This article belongs to the Special Issue Applications of Micellar Solutions)
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9 pages, 618 KiB  
Article
Structure and Intermolecular Interactions in Aqueous Solutions of Polyethylene Glycol
by László Almásy, Oleksandr P. Artykulnyi, Viktor I. Petrenko, Oleksandr I. Ivankov, Leonid A. Bulavin, Minhao Yan and Vasil M. Haramus
Molecules 2022, 27(8), 2573; https://doi.org/10.3390/molecules27082573 - 15 Apr 2022
Cited by 8 | Viewed by 2065
Abstract
Aqueous solutions of polyethylene glycol are studied by small-angle neutron scattering over a broad range of polymer molecular masses and concentrations. The scattering data were modeled by a Gaussian chain form factor combined with random phase approximation, which provided good fits over the [...] Read more.
Aqueous solutions of polyethylene glycol are studied by small-angle neutron scattering over a broad range of polymer molecular masses and concentrations. The scattering data were modeled by a Gaussian chain form factor combined with random phase approximation, which provided good fits over the whole studied concentration range. The results showed that polyethylene glycol in the molecular mass range 0.4–20 kDa in water at physiological temperature T = 37 °C behaves like a random coil in nearly theta solvent conditions. The obtained results serve as a reference for the description of complex mixtures with PEG used in various applications. Full article
(This article belongs to the Special Issue Applications of Micellar Solutions)
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11 pages, 4079 KiB  
Article
Application of CO2-Switchable Oleic-Acid-Based Surfactant for Reducing Viscosity of Heavy Oil
by Lulu Liu, Shuai He, Lu Tang, Shu Yang, Tao Ma and Xin Su
Molecules 2021, 26(20), 6273; https://doi.org/10.3390/molecules26206273 - 16 Oct 2021
Cited by 4 | Viewed by 1875
Abstract
CO2-switchable oligomeric surfactants have good viscosity-reducing properties; however, the complex synthesis of surfactants limits their application. In this study, a CO2-switchable “pseudo”-tetrameric surfactant oleic acid (OA)/cyclic polyamine (cyclen) was prepared by simple mixing and subsequently used to reduce the [...] Read more.
CO2-switchable oligomeric surfactants have good viscosity-reducing properties; however, the complex synthesis of surfactants limits their application. In this study, a CO2-switchable “pseudo”-tetrameric surfactant oleic acid (OA)/cyclic polyamine (cyclen) was prepared by simple mixing and subsequently used to reduce the viscosity of heavy oil. The surface activity of OA/cyclen was explored by a surface tensiometer and a potential for viscosity reduction was revealed. The CO2 switchability of OA/cyclen was investigated by alternately introducing CO2 and N2, and OA/cyclen was confirmed to exhibit a reversible CO2-switching performance. The emulsification and viscosity reduction analyses elucidated that a molar ratio of OA/cyclen of 4:1 formed the “pseudo”-tetrameric surfactants, and the emulsions of water and heavy oil with OA/cyclen have good stability and low viscosity and can be destabilized quickly by introducing CO2. The findings reported in this study reveal that it is feasible to prepare CO2-switchable pseudo-tetrameric surfactants with viscosity-reducing properties by simple mixing, thus providing a pathway for the emulsification and demulsification of heavy oil by using the CO2-switchable “pseudo”-oligomeric surfactants. Full article
(This article belongs to the Special Issue Applications of Micellar Solutions)
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18 pages, 6444 KiB  
Article
Determination of SLES in Personal Care Products by Colloid Titration with Light Reflection Measurements
by Dorota Ziółkowska, Iryna Syrotynska, Alexander Shyichuk and Jan Lamkiewicz
Molecules 2021, 26(9), 2716; https://doi.org/10.3390/molecules26092716 - 5 May 2021
Cited by 5 | Viewed by 2397
Abstract
The method of colloid titration with poly(diallyldimethylammonium) chloride has been improved to detect the endpoint with an off-vessel light reflectance sensor. The digital color sensor used measures light reflectance by means of light guides, with no immersion into the reaction solution. In such [...] Read more.
The method of colloid titration with poly(diallyldimethylammonium) chloride has been improved to detect the endpoint with an off-vessel light reflectance sensor. The digital color sensor used measures light reflectance by means of light guides, with no immersion into the reaction solution. In such a method, the optical signal is free of disturbances caused by sticky flocs in the solution. The improved automatic titration set was applied for the determination of sodium laureth sulfate (SLES) in industrial batches and commercial personal care products. The sample color and opacity do not disturb the SLES quantification. When the SLES content lies in the range from 5% to 9%, the optimal sample weight is from 6 g to 3 g. Full article
(This article belongs to the Special Issue Applications of Micellar Solutions)
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Graphical abstract

9 pages, 2162 KiB  
Communication
Structural Study of the Photo-Mediated Growth of Silver Nanoprisms
by Matti Knaapila, Ulla Vainio, Sophie E. Canton and Gunnel Karlsson
Molecules 2020, 25(22), 5413; https://doi.org/10.3390/molecules25225413 - 19 Nov 2020
Cited by 2 | Viewed by 1609
Abstract
We present a small-angle X-ray scattering (SAXS) study of the anisotropic photoinduced growth of silver (Ag) nanoprisms in aqueous dispersions. The growth of nearly spherical (<10 nm) Ag particles into large (>40 nm) and thin (<10 nm) triangular nanoprisms induced by 550 nm [...] Read more.
We present a small-angle X-ray scattering (SAXS) study of the anisotropic photoinduced growth of silver (Ag) nanoprisms in aqueous dispersions. The growth of nearly spherical (<10 nm) Ag particles into large (>40 nm) and thin (<10 nm) triangular nanoprisms induced by 550 nm laser is followed in terms of particle size using indirect and direct methods for irradiation times up to 150 min. During the process, the surface-to-volume ratio of the particles decreased. The SAXS data of the initial solution fit well to the model of polydisperse spheres with pronounced average diameters around 7.4 nm and 10 nm. The data after 45 min irradiation fit well to the model containing approximately the same amount of the initial particles and the end product, the nanoprisms. Full article
(This article belongs to the Special Issue Applications of Micellar Solutions)
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