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Molecules
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Surfactants & Detergents: Theory, Technology and Application
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Surfactants & Detergents: Theory, Technology and Application

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

Deadline for manuscript submissions: closed (31 March 2023) | Viewed by 11147

Special Issue Editors

Prof. Dr. Ryszard Zieliński

E-Mail Website
Guest Editor
Department of Technology and Instrumental Analysis, Institute of Quality Science, Poznan University of Economics and Business, PL-61875 Poznan, Poland
Interests: Physicochemistry of surfactants; Micelle formation and micellar transitions; Surfactant structure – properties relationship
Prof. Dr. Daria Wieczorek

E-Mail Website
Guest Editor
Department of Technology and Instrumental Analysis, Institute of Quality Science, Poznan University of Economics and Business, PL-61875 Poznan, Poland
Interests: surfactants synthesis; physicochemical properties of surfactants; antimicrobial activity of surfactants

Special Issue Information

Dear Colleagues,

Surfactants are a class of natural and synthetic compounds drawing a particular interest due to a broad spectrum of their practical applications. One of the basic challenges that can be met by modern enterprises which undertake a pro-innovative activity is the necessity of monitoring consumer expectations in relation to newly designed products. Most of them are based on a practical application of various physical or biological properties of surfactants which can be classified in different groups such as anionics, cationics, zwitterionics, and nonionics.

Nowadays, it is very hard to generate new surfactant-containing commercial product without a complete understanding of the interdependences occurring between the chemical structure and physical or biological properties of surfactants used as ingredients of any designed product. Therefore, introducing new surfactants in producing chemistry products necessitates the continuous development of not only new and fast but also efficient methods for identification of the applied raw materials. The quality of surfactant ingredients and products as well as the assurance of their safety are regarded as the essential conditions of economic success of these trade enterprises. Having in mind a fulfillment of this condition in a suitably long period it is necessary to conduct a continuous audit of consumer satisfaction, introduce innovative solutions, and also to perform quality control in both raw materials as well as commercially available goods.

This Special Issue aims to collect papers dealing with the quantitative relationships between the chemical structure of surfactants and their physical properties or biological activity in aqueous solutions; in addition, a particular focus on new achievements in the field will be appreciated.

Prof. Dr. Ryszard Zieliński
Prof. Dr. Daria Wieczorek
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

  • New types of surfactants
  • Physical chemistry of surfactants
  • Aggregation processes in surfactant solutions
  • Biological activity of surfactants
  • Surfactant–biomolecule interactions
  • Surfactant structure–properties relationship
  • Trends in surfactants application
  • Safety of surfactant products

Published Papers (4 papers)

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Research

16 pages, 4797 KiB  
Article
Solubilization of Reactive Red 2 in the Mixed Micelles of Cetylpyridinium Chloride and TX-114
by Tayyba Yaqoob, Saadia Shaukat, Rasha Alonaizan, Ramzan Ullah, Imran Khan, Muhammad Faizan Nazar and Hafiz Muhammad Abd Ur Rahman
Molecules 2023, 28(9), 3952; https://doi.org/10.3390/molecules28093952 - 8 May 2023
Cited by 2 | Viewed by 1368
Abstract
Owing to their surface active properties, surfactants have numerous applications in different fields of life. In the present research work, the solubilization of reactive red 2 (RR2) has been studied in single and mixed micellar systems (MMS) using UV-visible spectroscopy and electrical conductivity [...] Read more.
Owing to their surface active properties, surfactants have numerous applications in different fields of life. In the present research work, the solubilization of reactive red 2 (RR2) has been studied in single and mixed micellar systems (MMS) using UV-visible spectroscopy and electrical conductivity measurements. The interaction of RR2 with ionic micelles of cetylpyridinium chloride (CPC) was investigated. In order to probe the interaction of RR2 in MMS, mixtures of CPC and TX-114 (Triton X-114, a nonionic surfactant) were used. UV-visible spectroscopy has been used to obtain the degree of solubilization of RR2 in terms of the partition coefficient (Kc) and Gibbs free energy of partitioning (ΔG°p). Electrical conductivity data have been employed to detect the critical micelle concentration (CMC) of the surfactant systems in the presence of RR2 and, accordingly, to calculate the thermodynamic parameters of the micellization. From the obtained data, it is concluded that the micellization is spontaneous at all studied temperatures. Moreover, the micellization was observed to be driven by both enthalpy and entropy. The results also indicated that MMS have better solubilizing power than single micellar solutions. Full article
(This article belongs to the Special Issue Surfactants & Detergents: Theory, Technology and Application)
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21 pages, 5919 KiB  
Article
A Modified Contact Angle Measurement Process to Suppress Oil Drop Spreading and Improve Precision
by Xiao Deng, Xianmin Zhou, Muhammad Shahzad Kamal, Syed Muhammad Shakil Hussain, Mohamed Mahmoud and Shirish Patil
Molecules 2022, 27(4), 1195; https://doi.org/10.3390/molecules27041195 - 10 Feb 2022
Cited by 5 | Viewed by 2791
Abstract
Static contact angle measurement is a widely applied method for wettability assessment. Despite its convenience, it suffers from errors induced by contact angle hysteresis, material heterogeneity, and other factors. This paper discusses the oil drop spreading phenomenon that was frequently observed during contact [...] Read more.
Static contact angle measurement is a widely applied method for wettability assessment. Despite its convenience, it suffers from errors induced by contact angle hysteresis, material heterogeneity, and other factors. This paper discusses the oil drop spreading phenomenon that was frequently observed during contact angle measurements. Experimental tests showed that this phenomenon is closely related to surfactants in the surrounding phase, the remaining oil on the rock surface, and oil inside the surrounding phase. A modified contact angle measurement process was proposed. In the modified method, deionized water was used as the surrounding phase, and a rock surface cleaning step was added. Subsequent measurements showed a very low chance of oil drop spreading and improved precision. A further comparison study showed that, when the surrounding phase was deionized water, the measured contact angle values tended to be closer to intermediate-wet conditions compared to the values measured in clean surfactant solutions. This difference became more significant when the surface was strongly water-wet or strongly oil-wet. As a result, the developed process has two prerequisites: that the in-situ contact angle values inside surfactant solutions are not required, and that the wettability alteration induced by the surfactant solution is irreversible. Full article
(This article belongs to the Special Issue Surfactants & Detergents: Theory, Technology and Application)
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16 pages, 16717 KiB  
Article
In-Vivo Analysis and Model-Based Prediction of Tensides’ Influence on Drug Absorption
by Zuzana Vitková, Marián Tárník, Jarmila Pavlovičová, Ján Murgaš, Andrej Babinec and Anton Vitko
Molecules 2021, 26(18), 5602; https://doi.org/10.3390/molecules26185602 - 15 Sep 2021
Cited by 3 | Viewed by 2161
Abstract
Depending on their concentrations the surface-active substances, tensides (surfactants) can positively or negatively influence the drug absorption, which is widely used in the design of the dosage forms with controlled release. A problem is that the (in-vivo) rate of absorption cannot be directly [...] Read more.
Depending on their concentrations the surface-active substances, tensides (surfactants) can positively or negatively influence the drug absorption, which is widely used in the design of the dosage forms with controlled release. A problem is that the (in-vivo) rate of absorption cannot be directly measured and for that reason, it is frequently substituted by evaluation of the (in-vitro) dissolution. On other hand, a suitably designed pharmacokinetic model can directly predict virtually all pharmacokinetic quantities including both the rate of absorption and fraction of the dose reaching the blood circulation. The paper presents a new approach to the analysis of the rate of drug absorption and shows its superiority over traditional in-vivo approaches. Both the in-vivo analysis and model-based prediction of the tenside (monolaurin of sucrose) influence on the rate of absorption of the drug (sulfathiazole) after instantaneous per-oral administration to rats are discussed. It was found that 0.001% solution of tenside can increase the rate of absorption by cca 50% and a two-fold increase in absolute bioavailability can be reached. Attention is also devoted to the formal requirements laid on the model’s structure and its identifiability. The systematic design, substantiation and validation of a parsimonious predictive model that confirms in-vivo results are presented. The match between in-vivo observations and model-based predictions is demonstrated. The frequently overlooked metaphysics lying behind the compartmental modelling is briefly explained. Full article
(This article belongs to the Special Issue Surfactants & Detergents: Theory, Technology and Application)
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14 pages, 945 KiB  
Article
Preparation of Microemulsion from an Alkyl Polyglycoside Surfactant and Tea Tree Oil
by Thuy-Vi Vo, Ya-Yen Chou and Bing-Hung Chen
Molecules 2021, 26(7), 1971; https://doi.org/10.3390/molecules26071971 - 31 Mar 2021
Cited by 13 | Viewed by 3094
Abstract
Preparation and characterization of microemulsions consisting of a plant-derived alkyl polyglycoside (APG) surfactant and the essential oil of Melaleuca alternifolia (tea tree) was studied. This nonionic APG surfactant used was Triton CG-110 with a CMC at 1748 ppm at 25 °C. Tea tree [...] Read more.
Preparation and characterization of microemulsions consisting of a plant-derived alkyl polyglycoside (APG) surfactant and the essential oil of Melaleuca alternifolia (tea tree) was studied. This nonionic APG surfactant used was Triton CG-110 with a CMC at 1748 ppm at 25 °C. Tea tree oil (TTO) was extracted from tea tree leaves by Triton CG-110-assisted hydrodistillation method. The preparation of the microemulsion was aided by the construction of pseudo-ternary phase diagrams, which were investigated at the different weight ratios of surfactant mixtures (Smix = Triton CG-110/PPG) as 0.6:1, 1.8:1, 1:0 with hydrodistilled and commercial TTO by water titration method at room temperature. Particularly, structure of microemulsion was identified by electrical conductivity and viscosity. Moreover, shelf stability of some microemulsion made of 1% TTO with various concentration of Triton CG-110/PPG (1.8:1 w/w) were monitored for over a two-month period with dynamic light scattering. These results showed that microemulsion made of 1% TTO, 9% Triton CG-110/PPG (1.8:1 w/w) was insensitive with time and temperature of storage. Full article
(This article belongs to the Special Issue Surfactants & Detergents: Theory, Technology and Application)
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