Pub Date : 2023-12-10DOI: 10.1134/s1061933x23600719
Manish Kumar, C. P. Jain, Ajay Kumar Shukla, Garima Verma, Vimal Kumar Yadav
Abstract
Self-emulsifying systems, such as self-emulsifying drug delivery systems (SEDDS) and self-nanoemulsifying drug delivery systems (SNEDDS), particularly used for enhancing the bioavailability of hydrophobic drugs. This review comprehensively examines the terminologies and mechanisms involved in self-emulsifying systems. The complex nature of self-emulsification is elucidated, encompassing diffusion, interfacial phenomena, and thermodynamic considerations. Three main mechanisms are explored in this review: diffusion and stranding, negative free energy for nanoemulsion formation, and the liquid crystalline (LC) phases formation at the interface. Diffusion and stranding cause rapid diffusion of water-miscible components, forming fine emulsion droplets. However, it lacks a clear thermodynamic explanation. Concept of negative free energy provides a thermodynamic explanation, while the formation of LC phases at the interface is an intermediary event during diffusion-driven self-emulsification. Understanding these mechanisms is crucial for developing optimum self-emulsifying formulation for pharmaceutical delivery, food bioactive delivery, and cosmetic applications.
{"title":"Terminology and Mechanisms of Self-Emulsifying Systems for Biomedical Applications: A Comprehensive Review","authors":"Manish Kumar, C. P. Jain, Ajay Kumar Shukla, Garima Verma, Vimal Kumar Yadav","doi":"10.1134/s1061933x23600719","DOIUrl":"https://doi.org/10.1134/s1061933x23600719","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>Self-emulsifying systems, such as self-emulsifying drug delivery systems (SEDDS) and self-nanoemulsifying drug delivery systems (SNEDDS), particularly used for enhancing the bioavailability of hydrophobic drugs. This review comprehensively examines the terminologies and mechanisms involved in self-emulsifying systems. The complex nature of self-emulsification is elucidated, encompassing diffusion, interfacial phenomena, and thermodynamic considerations. Three main mechanisms are explored in this review: diffusion and stranding, negative free energy for nanoemulsion formation, and the liquid crystalline (LC) phases formation at the interface. Diffusion and stranding cause rapid diffusion of water-miscible components, forming fine emulsion droplets. However, it lacks a clear thermodynamic explanation. Concept of negative free energy provides a thermodynamic explanation, while the formation of LC phases at the interface is an intermediary event during diffusion-driven self-emulsification. Understanding these mechanisms is crucial for developing optimum self-emulsifying formulation for pharmaceutical delivery, food bioactive delivery, and cosmetic applications.</p>","PeriodicalId":521,"journal":{"name":"Colloid Journal","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2023-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138568441","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-12-10DOI: 10.1134/s1061933x23600811
T. V. Dudareva, I. A. Krasotkina, I. V. Gordeeva, V. G. Nikolsky, L. A. Gorelisheva, V. N. Garmanov
Abstract
In the temperature range –10–30°С the influence of thermo-oxidative aging, frequency and deformation on the interfacial interaction according to the parameters K–B–G* and К–В–δ in asphalt mastics and modified mastics based on bitumen grade BND 60/90 has been investigated. The filler was introduced into bitumen in the ratio of 1/1 by weight. Active powder of discretely devulcanized rubber (APDDR) as a modifier was introduced in the ratio bitumen/APDDR = 87.5/12.5 by weight. It is shown that the modification of APDDR provides a greater thickness of adsorbed layer on the surface of filler particles under various conditions of external influences compared to mastic, and this thickness depends on the sequence of introduction of filler and APDDR.
{"title":"Effect of Aging and Modification on the Interfacial Interaction in Asphalt Mastics","authors":"T. V. Dudareva, I. A. Krasotkina, I. V. Gordeeva, V. G. Nikolsky, L. A. Gorelisheva, V. N. Garmanov","doi":"10.1134/s1061933x23600811","DOIUrl":"https://doi.org/10.1134/s1061933x23600811","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>In the temperature range –10–30°С the influence of thermo-oxidative aging, frequency and deformation on the interfacial interaction according to the parameters <i>K–B–G*</i> and <i>К–В–</i>δ in asphalt mastics and modified mastics based on bitumen grade BND 60/90 has been investigated. The filler was introduced into bitumen in the ratio of 1/1 by weight. Active powder of discretely devulcanized rubber (APDDR) as a modifier was introduced in the ratio bitumen/APDDR = 87.5/12.5 by weight. It is shown that the modification of APDDR provides a greater thickness of adsorbed layer on the surface of filler particles under various conditions of external influences compared to mastic, and this thickness depends on the sequence of introduction of filler and APDDR.</p>","PeriodicalId":521,"journal":{"name":"Colloid Journal","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2023-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138567838","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-12-10DOI: 10.1134/s1061933x23600732
N. A. Kononenko, S. A. Shkirskaya, M. V. Rybalko, D. A. Zotova
Abstract
The influence of the type and amount of an inert component in perfluorinated MF-4SC sulfonic cation-exchange membrane on its equilibrium physicochemical and transport properties has been studied. The exchange capacity, water content, specific conductivity, and diffusion and electroosmotic permeability of two series of MF-4SC membranes obtained by casting from polymer solutions in dimethylformamide with variable contents of inert fluoropolymers have been investigated. A relationship between the equilibrium and dynamic hydration characteristics of the samples has been found as a result of studying water distribution over water binding energies and effective pore radii and the numbers of water transport in an external electric field. The type and content of an inert component in the perfluorinated membrane have been found to affect more significantly the state of water under equilibrium conditions than the electroosmotic water transport.
{"title":"The Influence of Inert Fluoropolymer on Equilibrium and Dynamic Hydration Characteristics of MF-4SC Membrane","authors":"N. A. Kononenko, S. A. Shkirskaya, M. V. Rybalko, D. A. Zotova","doi":"10.1134/s1061933x23600732","DOIUrl":"https://doi.org/10.1134/s1061933x23600732","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The influence of the type and amount of an inert component in perfluorinated MF-4SC sulfonic cation-exchange membrane on its equilibrium physicochemical and transport properties has been studied. The exchange capacity, water content, specific conductivity, and diffusion and electroosmotic permeability of two series of MF-4SC membranes obtained by casting from polymer solutions in dimethylformamide with variable contents of inert fluoropolymers have been investigated. A relationship between the equilibrium and dynamic hydration characteristics of the samples has been found as a result of studying water distribution over water binding energies and effective pore radii and the numbers of water transport in an external electric field. The type and content of an inert component in the perfluorinated membrane have been found to affect more significantly the state of water under equilibrium conditions than the electroosmotic water transport.</p>","PeriodicalId":521,"journal":{"name":"Colloid Journal","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2023-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138567965","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-12-10DOI: 10.1134/s1061933x23600628
A. I. Levinsky
Abstract
__ Semi-empirical equations are derived that describe the dependence of shear stress on shear rate during the flow of a one-component suspension. The suspension is considered as consisting of two fractions: single grains of the solid phase and their dimers, between which a reversible dimerization reaction occurs. In this case, the dimerization of single grains is considered as a reaction with an invariable rate constant, and the dissociation of dimers is considered as an inverse reaction with a rate constant that increases linearly with the shear rate. The equations are based on the Krieger−Doherty formula, generalized to the case of a multicomponent suspension.
{"title":"On the Rheology of Thixotropic and Rheopexic Suspensions","authors":"A. I. Levinsky","doi":"10.1134/s1061933x23600628","DOIUrl":"https://doi.org/10.1134/s1061933x23600628","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p><sup><b>__</b></sup> Semi-empirical equations are derived that describe the dependence of shear stress on shear rate during the flow of a one-component suspension. The suspension is considered as consisting of two fractions: single grains of the solid phase and their dimers, between which a reversible dimerization reaction occurs. In this case, the dimerization of single grains is considered as a reaction with an invariable rate constant, and the dissociation of dimers is considered as an inverse reaction with a rate constant that increases linearly with the shear rate. The equations are based on the Krieger−Doherty formula, generalized to the case of a multicomponent suspension.</p>","PeriodicalId":521,"journal":{"name":"Colloid Journal","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2023-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138560919","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-12-10DOI: 10.1134/s1061933x23600823
P. S. Popovetskiy
Abstract
Stabilization of charged particles in nonpolar media is one of the most complicated problems in modern colloid chemistry. The attribution to colloid chemistry is absolutely justified in this case: in nonpolar media, charged particles have, as a rule, a supramolecular nature. Low dielectric permittivity of a medium makes the existence of ions in the classical interpretation energetically disadvantageous. The key condition for the presence of charged particles in nonpolar media is their steric stabilization, which requires some revision of the classical concepts of the structure of the electrical double layer, primarily, its diffuse part. Detailed analyzing the structure of the electrical double layer in nonpolar media is of importance because of the high practical significance of electrokinetic phenomena in such systems. This review considers the main models for steric stabilization of charged particles with surfactants in dispersion media having dielectric permittivities lower than 5. The main attention is focused on not only the concentrations corresponding to the formation of reverse micelles, but also on the concentrations below the critical micelle concentration. In addition, nontypical examples of electrokinetic phenomena in organosols are considered.
{"title":"Models for Stabilization of Charged Particles with Surfactants in Nonpolar Media","authors":"P. S. Popovetskiy","doi":"10.1134/s1061933x23600823","DOIUrl":"https://doi.org/10.1134/s1061933x23600823","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>Stabilization of charged particles in nonpolar media is one of the most complicated problems in modern colloid chemistry. The attribution to colloid chemistry is absolutely justified in this case: in nonpolar media, charged particles have, as a rule, a supramolecular nature. Low dielectric permittivity of a medium makes the existence of ions in the classical interpretation energetically disadvantageous. The key condition for the presence of charged particles in nonpolar media is their steric stabilization, which requires some revision of the classical concepts of the structure of the electrical double layer, primarily, its diffuse part. Detailed analyzing the structure of the electrical double layer in nonpolar media is of importance because of the high practical significance of electrokinetic phenomena in such systems. This review considers the main models for steric stabilization of charged particles with surfactants in dispersion media having dielectric permittivities lower than 5. The main attention is focused on not only the concentrations corresponding to the formation of reverse micelles, but also on the concentrations below the critical micelle concentration. In addition, nontypical examples of electrokinetic phenomena in organosols are considered.</p>","PeriodicalId":521,"journal":{"name":"Colloid Journal","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2023-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138567975","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-12-10DOI: 10.1134/s1061933x23600859
A. G. Nugmanova, A. I. Gorshkova, A. V. Yagodin, A. A. Averin, M. A. Kalinina
Abstract
The possibility of stabilization of zinc(II) 2,3,9,10,16,17,23,24-octa[(3,5-sodium biscarboxylate)phenoxy] phthalocyaninate (ZnPc16) by its hybridization with the surface of graphene oxide (GO) sheets via van der Waals or coordination bonds with functional groups of the carbon matrix in the GO hydrosols has been investigated. A combination of physicochemical analysis methods (scanning electron microscopy, fluorescence microscopy, powder X-ray diffraction, and Raman spectroscopy) has been employed to confirm the integration of ZnPc16 with GO nanosheets and to study the morphology and structure of the obtained hybrid materials. Using electronic absorption spectroscopy, it has been found that, regardless of the hybridization method, the binding of the macrocycles to the inorganic particles increases the stability of ZnPc16 in an aqueous medium being irradiated with visible light. The analysis of spectral kinetic data has shown that, in contrast to the system obtained by direct integration of ZnPc16 and GO, the hybrid material formed by coordination bonding of the components via zinc acetate (Zn(OAc)2) as a binding metal cluster is able to exhibit photocatalytic properties in oxidative photodegradation of some model organic pollutant substrates (rhodamine 6G, 1,5-dihydroxynaphthalene, and 1,4-nitrophenol). The proposed colloid-chemical approach to the stabilization of photoactive water-soluble phthalocyaninates makes it possible to increase their resistance to photoinduced self-oxidation and can be adapted for various derivatives of tetrapyrrole compounds possessing photosensitizing properties.
摘要 研究了 2,3,9,10,16,17,23,24-八[(3,5-二羧酸钠)苯氧基]酞菁酸锌（ZnPc16）通过范德华或与 GO 水溶液中碳基质的官能团配位键与氧化石墨烯（GO）片表面杂化而稳定化的可能性。研究人员采用了多种物理化学分析方法（扫描电子显微镜、荧光显微镜、粉末 X 射线衍射和拉曼光谱）来确认 ZnPc16 与 GO 纳米片的结合，并研究了所得杂化材料的形态和结构。利用电子吸收光谱发现，无论采用哪种杂化方法，大环与无机颗粒的结合都会增加 ZnPc16 在水介质中被可见光照射后的稳定性。对光谱动力学数据的分析表明，与 ZnPc16 和 GO 直接结合得到的体系不同，通过醋酸锌（Zn(OAc)2）作为结合金属簇，各组分配位结合形成的杂化材料能够在氧化光降解一些模型有机污染物底物（罗丹明 6G、1,5-二羟基萘和 1,4-硝基苯酚）时表现出光催化特性。所提出的胶体-化学方法可稳定具有光活性的水溶性酞菁，从而提高其抗光诱导自氧化的能力，并可适用于具有光敏特性的四吡咯化合物的各种衍生物。
{"title":"Noncovalent Stabilization of Water-Soluble Zinc Phthalocyaninate in Graphene Oxide Hydrosol","authors":"A. G. Nugmanova, A. I. Gorshkova, A. V. Yagodin, A. A. Averin, M. A. Kalinina","doi":"10.1134/s1061933x23600859","DOIUrl":"https://doi.org/10.1134/s1061933x23600859","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The possibility of stabilization of zinc(II) 2,3,9,10,16,17,23,24-octa[(3,5-sodium biscarboxylate)phenoxy] phthalocyaninate (ZnPc<sub>16</sub>) by its hybridization with the surface of graphene oxide (GO) sheets via van der Waals or coordination bonds with functional groups of the carbon matrix in the GO hydrosols has been investigated. A combination of physicochemical analysis methods (scanning electron microscopy, fluorescence microscopy, powder X-ray diffraction, and Raman spectroscopy) has been employed to confirm the integration of ZnPc<sub>16</sub> with GO nanosheets and to study the morphology and structure of the obtained hybrid materials. Using electronic absorption spectroscopy, it has been found that, regardless of the hybridization method, the binding of the macrocycles to the inorganic particles increases the stability of ZnPc<sub>16</sub> in an aqueous medium being irradiated with visible light. The analysis of spectral kinetic data has shown that, in contrast to the system obtained by direct integration of ZnPc<sub>16</sub> and GO, the hybrid material formed by coordination bonding of the components via zinc acetate (Zn(OAc)<sub>2</sub>) as a binding metal cluster is able to exhibit photocatalytic properties in oxidative photodegradation of some model organic pollutant substrates (rhodamine 6G, 1,5-dihydroxynaphthalene, and 1,4-nitrophenol). The proposed colloid-chemical approach to the stabilization of photoactive water-soluble phthalocyaninates makes it possible to increase their resistance to photoinduced self-oxidation and can be adapted for various derivatives of tetrapyrrole compounds possessing photosensitizing properties.</p>","PeriodicalId":521,"journal":{"name":"Colloid Journal","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2023-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138561120","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-12-10DOI: 10.1134/s1061933x23600537
V. Gutsanu, O. Petuhov, A.-M. Ipate, G. Lisa, M. Botnaru
Abstract—
Obtaining new sorbents-catalysts with selective properties is of particular interest. A series of metal/activated carbon composites with sorption and catalytic properties has been obtained and studied: AC-Mn1, AC-Mn2, AC-Mn1S, AC-Mn2S, AC-Cu1, AC-Co1, and AC-0. The composites were obtained from local raw materials by the hydrothermal method. SEM EDX methods were used to determine the morphology of the particles of compounds in the carbon phase and the average elemental composition of the surface. The detection of crystalline phases and functional groups of the organic compounds in the samples was carried out with XRD method and FT-IR spectroscopy, respectively. The thermal stability of the researched materials was performed thermogravimetrically in the temperature range 20–700°C. All analyzed samples have a good thermal stability; the decomposition in air atmosphere begins at temperatures higher than 240°C. The physicochemical and sorption characteristics of the materials were studied by N2 sorption at –196°C. The tests have shown that the studied composites have the ability to transform (remove) nitrite ions in solution.
{"title":"Metal/Carbon Composites: Precursors for Obtaining New Sorbents-Catalysts","authors":"V. Gutsanu, O. Petuhov, A.-M. Ipate, G. Lisa, M. Botnaru","doi":"10.1134/s1061933x23600537","DOIUrl":"https://doi.org/10.1134/s1061933x23600537","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract—</h3><p>Obtaining new sorbents-catalysts with selective properties is of particular interest. A series of metal/activated carbon composites with sorption and catalytic properties has been obtained and studied: AC-Mn1, AC-Mn2, AC-Mn1S, AC-Mn2S, AC-Cu1, AC-Co1, and AC-0. The composites were obtained from local raw materials by the hydrothermal method. SEM EDX methods were used to determine the morphology of the particles of compounds in the carbon phase and the average elemental composition of the surface. The detection of crystalline phases and functional groups of the organic compounds in the samples was carried out with XRD method and FT-IR spectroscopy, respectively. The thermal stability of the researched materials was performed thermogravimetrically in the temperature range 20–700°C. All analyzed samples have a good thermal stability; the decomposition in air atmosphere begins at temperatures higher than 240°C. The physicochemical and sorption characteristics of the materials were studied by N<sub>2</sub> sorption at –196°C. The tests have shown that the studied composites have the ability to transform (remove) nitrite ions in solution.</p>","PeriodicalId":521,"journal":{"name":"Colloid Journal","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2023-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138560915","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-12-01DOI: 10.1134/s1061933x23600616
Abstract
A modification of the “Stefan’s rule” for the surface tension coefficients of liquids has been proposed, with the modification consisting in choosing a liquid as a system of comparison with respect to its surface. An expression for the surface tension coefficients has been derived and employed to interpret their temperature dependences for a number of molecular liquids with different physicochemical properties.
{"title":"Modification of the Stefan’s Rule for the Surface Tension Coefficients of Liquids","authors":"","doi":"10.1134/s1061933x23600616","DOIUrl":"https://doi.org/10.1134/s1061933x23600616","url":null,"abstract":"<span> <h3>Abstract</h3> <p>A modification of the “Stefan’s rule” for the surface tension coefficients of liquids has been proposed, with the modification consisting in choosing a liquid as a system of comparison with respect to its surface. An expression for the surface tension coefficients has been derived and employed to interpret their temperature dependences for a number of molecular liquids with different physicochemical properties.</p> </span> <span> <span> <img alt=\"\" src=\"https://static-content.springer.com/image/MediaObjects/10595_2024_8485_Fig1_HTML.png\"/> </span> </span>","PeriodicalId":521,"journal":{"name":"Colloid Journal","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139580732","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-12-01DOI: 10.1134/s1061933x23600975
Abstract
Nanodispersions can be used to solve various practical problems, such as increasing the efficiency of heating systems, cooling of electrical equipment, intensifying oil recovery, etc., because dispersing nanoparticles in liquid media provides an inexpensive and convenient way to significantly improve various functional properties of a base fluid. Although the influence of dispersed particles on surface phenomena in systems comprising nanofluids has been studied for more than 30 years, due to a number of factors, the problem of appropriate and self-consistent description of the behavior of nanofluids will apparently remain to be the focus of scientific attention in the coming decades. This paper presents a brief review of recently published results that are of general importance for understanding the behavior of the surface tension of nanofluids, as well as the processes accompanying wetting with nanofluids and their spreading over various surfaces.
{"title":"The Role of Dispersed Particles in the Physicochemical Behavior of Nanofluids","authors":"","doi":"10.1134/s1061933x23600975","DOIUrl":"https://doi.org/10.1134/s1061933x23600975","url":null,"abstract":"<span> <h3>Abstract</h3> <p>Nanodispersions can be used to solve various practical problems, such as increasing the efficiency of heating systems, cooling of electrical equipment, intensifying oil recovery, etc., because dispersing nanoparticles in liquid media provides an inexpensive and convenient way to significantly improve various functional properties of a base fluid. Although the influence of dispersed particles on surface phenomena in systems comprising nanofluids has been studied for more than 30 years, due to a number of factors, the problem of appropriate and self-consistent description of the behavior of nanofluids will apparently remain to be the focus of scientific attention in the coming decades. This paper presents a brief review of recently published results that are of general importance for understanding the behavior of the surface tension of nanofluids, as well as the processes accompanying wetting with nanofluids and their spreading over various surfaces.</p> </span> <span> <span> <img alt=\"\" src=\"https://static-content.springer.com/image/MediaObjects/10595_2024_8481_Fig1_HTML.png\"/> </span> </span>","PeriodicalId":521,"journal":{"name":"Colloid Journal","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139580724","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-10-11DOI: 10.1134/s1061933x23600550
M. A. Klimovich, M. A. Kolyvanova, O. V. Dement’eva, O. N. Klimovich, V. M. Rudoy, V. A. Kuzmin, V. N. Morozov
{"title":"Impact of the Aging of Ultrasmall Gold Nanoparticles on their Interaction with Cholesteric DNA Microparticles","authors":"M. A. Klimovich, M. A. Kolyvanova, O. V. Dement’eva, O. N. Klimovich, V. M. Rudoy, V. A. Kuzmin, V. N. Morozov","doi":"10.1134/s1061933x23600550","DOIUrl":"https://doi.org/10.1134/s1061933x23600550","url":null,"abstract":"","PeriodicalId":521,"journal":{"name":"Colloid Journal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136063071","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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