Colloid Journal最新文献_第8页

Terminology and Mechanisms of Self-Emulsifying Systems for Biomedical Applications: A Comprehensive Review 用于生物医学应用的自乳化系统的术语和机制：全面回顾

IF 1.1 4区化学

Colloid Journal Pub Date : 2023-12-10 DOI: 10.1134/s1061933x23600719

Manish Kumar, C. P. Jain, Ajay Kumar Shukla, Garima Verma, Vimal Kumar Yadav

{"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}

引用次数: 0

Effect of Aging and Modification on the Interfacial Interaction in Asphalt Mastics 老化和改性对沥青胶料界面相互作用的影响

IF 1.1 4区化学

Colloid Journal Pub Date : 2023-12-10 DOI: 10.1134/s1061933x23600811

T. V. Dudareva, I. A. Krasotkina, I. V. Gordeeva, V. G. Nikolsky, L. A. Gorelisheva, V. N. Garmanov

引用次数: 0

The Influence of Inert Fluoropolymer on Equilibrium and Dynamic Hydration Characteristics of MF-4SC Membrane 惰性含氟聚合物对 MF-4SC 膜平衡和动态水合特性的影响

IF 1.1 4区化学

Colloid Journal Pub Date : 2023-12-10 DOI: 10.1134/s1061933x23600732

N. A. Kononenko, S. A. Shkirskaya, M. V. Rybalko, D. A. Zotova

引用次数: 0

On the Rheology of Thixotropic and Rheopexic Suspensions 关于触变悬浮液和流变悬浮液的流变学

IF 1.1 4区化学

Colloid Journal Pub Date : 2023-12-10 DOI: 10.1134/s1061933x23600628

A. I. Levinsky

引用次数: 0

Models for Stabilization of Charged Particles with Surfactants in Nonpolar Media 非极性介质中带电粒子与表面活性剂的稳定模型

IF 1.1 4区化学

Colloid Journal Pub Date : 2023-12-10 DOI: 10.1134/s1061933x23600823

P. S. Popovetskiy

{"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}

引用次数: 0

Noncovalent Stabilization of Water-Soluble Zinc Phthalocyaninate in Graphene Oxide Hydrosol 石墨烯氧化物水溶液中水溶性酞菁酸锌的非共价稳定作用

IF 1.1 4区化学

Colloid Journal Pub Date : 2023-12-10 DOI: 10.1134/s1061933x23600859

A. G. Nugmanova, A. I. Gorshkova, A. V. Yagodin, A. A. Averin, M. A. Kalinina

{"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}

引用次数: 0

Metal/Carbon Composites: Precursors for Obtaining New Sorbents-Catalysts 金属/碳复合材料：获得新型吸附剂-催化剂的前驱体

IF 1.1 4区化学

Colloid Journal Pub Date : 2023-12-10 DOI: 10.1134/s1061933x23600537

V. Gutsanu, O. Petuhov, A.-M. Ipate, G. Lisa, M. Botnaru

{"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}

引用次数: 0

Modification of the Stefan’s Rule for the Surface Tension Coefficients of Liquids 修改液体表面张力系数的斯特凡法则

IF 1.1 4区化学

Colloid Journal Pub Date : 2023-12-01 DOI: 10.1134/s1061933x23600616

引用次数: 0

The Role of Dispersed Particles in the Physicochemical Behavior of Nanofluids 分散颗粒在纳米流体物理化学行为中的作用

IF 1.1 4区化学

Colloid Journal Pub Date : 2023-12-01 DOI: 10.1134/s1061933x23600975

引用次数: 0

Impact of the Aging of Ultrasmall Gold Nanoparticles on their Interaction with Cholesteric DNA Microparticles 超微金纳米粒子老化对其与胆甾醇化DNA微粒相互作用的影响

4区化学

Colloid Journal Pub Date : 2023-10-11 DOI: 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

引用次数: 0