Colloid Journal最新文献

Cryostructuring of Polymeric Systems. 71. Poly(vinyl alcohol) Cryogels Formed by Freezing–Defrosting of Concentrated Polymer Solutions in a Dimethyl Sulfoxide–Dimethylformamide Mixture 高分子体系的低温结构。71。聚乙烯醇在二甲基亚砜-二甲基甲酰胺混合物中的浓缩聚合物溶液冷冻-除霜形成的低温物

IF 1.1 4区化学

Colloid Journal Pub Date : 2026-04-14 DOI: 10.1134/S1061933X25601830

D. A. Michurov, V. G. Vasil’ev, V. I. Lozinsky

{"title":"Cryostructuring of Polymeric Systems. 71. Poly(vinyl alcohol) Cryogels Formed by Freezing–Defrosting of Concentrated Polymer Solutions in a Dimethyl Sulfoxide–Dimethylformamide Mixture","authors":"D. A. Michurov, V. G. Vasil’ev, V. I. Lozinsky","doi":"10.1134/S1061933X25601830","DOIUrl":"10.1134/S1061933X25601830","url":null,"abstract":"Noncovalent cryogels have been prepared via the cryotropic gelation of 100 g/L poly(vinyl alcohol) (PVA) solutions in dimethyl sulfoxide (DMSO) and its mixture with dimethylformamide (DMF) (75 : 25, vol/vol). The physicochemical characteristics of the cryogels have been determined for both freshly prepared (“primary”) samples and samples subjected to replacing organic dispersion media by water with the formation of hydrated (“secondary”) PVA cryogels. It has been shown that the elasticity moduli of the samples formed in the DMSO/DMF medium are significantly higher than those of the cryogels prepared in the DMSO medium. Moreover, the former gel matrices undergo a greater volumetric shrinkage during hydration in comparison with the latter cryogels. In addition, cryogels prepared in the DMSO/DMF medium are highly transparent. The kinetic study of releasing a model drug, ibuprofen sodium salt, from the “secondary” cryogels has shown the absence of significant diffusion hindrances for the release of this biologically active compound from the gel carriers.","PeriodicalId":521,"journal":{"name":"Colloid Journal","volume":"88 2","pages":"173 - 187"},"PeriodicalIF":1.1,"publicationDate":"2026-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147665679","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

Modified Polyphenylquinoxalines. Surface Energy, Stability in Phosphoric Acid, and DFT Studies for Proton-Conducting Membranes Polyphenylquinoxalines修改。表面能，磷酸稳定性，质子导电膜的DFT研究

IF 1.1 4区化学

Colloid Journal Pub Date : 2026-04-14 DOI: 10.1134/S1061933X25601842

A. M. Shulgin, E. G. Bulycheva, N. M. Belomoina, Z. S. Klemenkova

{"title":"Modified Polyphenylquinoxalines. Surface Energy, Stability in Phosphoric Acid, and DFT Studies for Proton-Conducting Membranes","authors":"A. M. Shulgin, E. G. Bulycheva, N. M. Belomoina, Z. S. Klemenkova","doi":"10.1134/S1061933X25601842","DOIUrl":"10.1134/S1061933X25601842","url":null,"abstract":"The influence of coordination crosslinking with zirconium acetylacetonate Zr(AcAc)4 and sulfonation on the properties of polyphenylquinoxaline (PPQ) is comprehensively investigated using surface energy models (OWRK and vOCG), Hansen solubility parameters (HSPs), measurements of swelling in H3PO4, IR spectroscopy, and quantum-chemical calculations performed in terms of the density functional theory (DFT). Sulfonation of PPQ leads to a significant increase in the polar and acid–base components of the surface energy, which is in good agreement with the calculations of the electrostatic potential (ESP) and dipole moment. A pronounced correlation is found between the surface HSPs (calculated on the basis of contact angles) and the degree of swelling in H3PO4. Coordination crosslinking with the use of Zr(AcAc)4 (0.5 wt %) provides the polymer with stability in phosphoric acid. The calculations of the binding energy and bond order confirm the formation of strong coordination bonds between Zr4+ ions and nitrogen atoms. The modification of PPQ makes it possible to regulate the key characteristics, such as swelling and suitability for operation in aggressive environments, of proton-conducting membranes.","PeriodicalId":521,"journal":{"name":"Colloid Journal","volume":"88 2","pages":"257 - 268"},"PeriodicalIF":1.1,"publicationDate":"2026-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147665761","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

Control of Particle Size and Colloidal Stability of ZnO Nanoparticles for Enhanced Catalytic Activity in Diesel Emission Reduction 控制氧化锌纳米颗粒粒径和胶体稳定性以增强柴油减排催化活性

IF 1.1 4区化学

Colloid Journal Pub Date : 2026-04-14 DOI: 10.1134/S1061933X25601684

Yong-Min Ho, Sung-Jin Kim, Myong-Il Pang, Yun-Hyok Kye, Chung-Bom Jon

{"title":"Control of Particle Size and Colloidal Stability of ZnO Nanoparticles for Enhanced Catalytic Activity in Diesel Emission Reduction","authors":"Yong-Min Ho, Sung-Jin Kim, Myong-Il Pang, Yun-Hyok Kye, Chung-Bom Jon","doi":"10.1134/S1061933X25601684","DOIUrl":"10.1134/S1061933X25601684","url":null,"abstract":"The mitigation of hazardous emissions from diesel engines remains a critical challenge for environmental protection. This study presents a nano-engineering strategy focused on the precise control of particle size and colloidal stability of zinc oxide (ZnO) nanoparticles to reduce carbon monoxide (CO), hydrocarbon (HC), and nitrogen oxides (NOx) emissions. ZnO nanoparticles were synthesized via a homogeneous precipitation method and subsequently engineered through wet planetary ball milling for 2 and 4 h to achieve tailored primary particle size distributions of 50–120 nm (average: 85 nm) and 20–60 nm (average: 40 nm), respectively. Oleic acid was employed as a surfactant to ensure excellent colloidal stability in diesel fuel, preventing aggregation and maintaining a homogeneous dispersion. The key finding demonstrates that diesel fuel blended with a lower concentration (20 ppm) of the smaller nanoparticles (20–60 nm) achieved superior reductions in CO (14.0%), HC (10.4%), and NOx (5.1%) emissions compared to fuel containing a higher concentration (40 ppm) of the larger nanoparticles (50–120 nm). This result highlights that precise particle size reduction and colloidal stabilization are more effective strategies than simply increasing nanoparticle concentration. The enhanced catalytic activity is attributed to the larger specific surface area and improved interfacial properties of the smaller, well-dispersed nanoparticles, which promote more complete fuel combustion. This work underscores the significant potential of colloidal engineering in developing sustainable and efficient nano-fuel additives, providing fundamental insights for the design of high-performance catalytic systems in energy and environmental applications.","PeriodicalId":521,"journal":{"name":"Colloid Journal","volume":"88 2","pages":"269 - 276"},"PeriodicalIF":1.1,"publicationDate":"2026-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147665706","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

Dynamic Surface Properties of Aqueous Dispersions of Ovalbumin Fibrils 卵清蛋白原纤维水分散体的动态表面特性

IF 1.1 4区化学

Colloid Journal Pub Date : 2026-04-14 DOI: 10.1134/S1061933X25601647

A. V. Akentiev, V. A. Shegay, G. Loglio, R. Miller, B. A. Noskov

引用次数: 0

Three-Dimensional Mixed Convection Flow of a Hybrid Nanofluid over a Moving Plate Incorporating the Influences of Inclined Magnetic Field 考虑倾斜磁场影响的混合纳米流体在移动板上的三维混合对流流动

IF 1.1 4区化学

Colloid Journal Pub Date : 2026-04-14 DOI: 10.1134/S1061933X25601878

Supriya Yadav, Shwetambari Yadav, A. N. Filippov, Pramod Kumar Yadav

{"title":"Three-Dimensional Mixed Convection Flow of a Hybrid Nanofluid over a Moving Plate Incorporating the Influences of Inclined Magnetic Field","authors":"Supriya Yadav, Shwetambari Yadav, A. N. Filippov, Pramod Kumar Yadav","doi":"10.1134/S1061933X25601878","DOIUrl":"10.1134/S1061933X25601878","url":null,"abstract":"Nanofluids and hybrid nanofluids have emerged as advanced working fluids owing to their superior heat and mass transfer capabilities. In this context, this present novel study aims to investigate the three-dimensional mixed convection flow of alumina–сopper/water (Al2O3–Cu/H2O) hybrid nanofluid over an exponentially stretching permeable moving sheet with suction/injection effects. In this work, the authors have considered the exponentially varying inclined magnetic field on the flow system. Using the similarity transformation, the nonlinear partial differential equations (PDEs) of flow are converted into ordinary differential equations (ODEs). These ODEs are solved using fourth-order collocation technique for boundary value problems (bvp4c) inbuilt in MATLAB software. In this study, the authors have analysed impact of various physical parameters on the velocity in the x-direction, velocity in the y-direction, concentration profile, temperature profile, skin friction coefficients, characteristics of heat transfer, and Sherwood number of the fluid. Comparative analysis reveals a decrease in the skin friction coefficient and an enhancement in heat and mass transfer rates achieved by hybrid nanofluids because of their superior thermophysical properties. The findings of the present model underscore the effectiveness of hybrid nanofluids as efficient thermal transport media in high-performance engineering and energy systems.","PeriodicalId":521,"journal":{"name":"Colloid Journal","volume":"88 2","pages":"277 - 301"},"PeriodicalIF":1.1,"publicationDate":"2026-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147665678","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

Halloysite–Iron Oxide Composites as Tetracycline Carriers. Adsorption Properties and Antimicrobial Activity In Vitro 高岭土-氧化铁复合材料作为四环素载体。体外吸附性能及抑菌活性研究

IF 1.1 4区化学

Colloid Journal Pub Date : 2026-04-14 DOI: 10.1134/S1061933X25601696

O. V. Alekseeva, A. V. Noskov, D. N. Yashkova, O. Yu. Kuznetsov, M. A. Kirilenko, A. V. Agafonov

引用次数: 0

Formation of Two Concentration Regions within the Isotherms of Mo(VI) Adsorption on TiO2 by Cause of Oligomerization Processes Mo（VI）在TiO2上的低聚吸附等温线内形成两个浓度区

IF 1.1 4区化学

Colloid Journal Pub Date : 2026-04-14 DOI: 10.1134/S1061933X25601854

S. S. Terashkevich, O. V. Guseva, E. V. Kuznetsova, M. A. Gromak

{"title":"Formation of Two Concentration Regions within the Isotherms of Mo(VI) Adsorption on TiO2 by Cause of Oligomerization Processes","authors":"S. S. Terashkevich, O. V. Guseva, E. V. Kuznetsova, M. A. Gromak","doi":"10.1134/S1061933X25601854","DOIUrl":"10.1134/S1061933X25601854","url":null,"abstract":"Modeling of molybdenum adsorption on titanium dioxide can be impeded by oligomerization processes and mutual transformations of molybdenum chemical forms. The scientific community mostly accepts a viewpoint that molybdenum is adsorbed in form of an anion with a tendency towards formation of polymeric forms on the surface, which leads to an emergence of two regions of equilibrium sorbate concentrations on the isotherms at neutral and slightly acidic pH values leastways. In present study, the experiment demonstrated that this approach can be applied to acidic environments having a pH value less than 2, that is a case of neutral and positively charged forms of molybdenum existence in solution. The considered pH region corresponds to several industrially significant processes (e.g., treatment of irradiated solution targets for the production of 99Mo and technological procedures of metallurgical production). The mean charge of the adsorbed species was estimated through measuring the electrokinetic potential by means of electrophoretic light scattering method and resulted to be –0.1e as accounted on the slip plane of the electrical double layer after all the screening. The obtained value indicates a predominance of anionic forms in the sorbate. It can be seen that the transition between two regions of adsorption isotherms occurs when the equilibrium sorbate concentration comes down to 10−4 mol/L by order of magnitude, which corresponds to the conventional lower limit for polymeric molybdenum ions to be observed in an aqueous solution. The total monolayer capacity of the adsorbent in the region of oligomeric forms adsorption (~2 mmol/g) is almost 3 times higher than in the region of monomeric adsorption (~0.7 mmol/g).","PeriodicalId":521,"journal":{"name":"Colloid Journal","volume":"88 2","pages":"229 - 236"},"PeriodicalIF":1.1,"publicationDate":"2026-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147665707","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

Two-Stage Method for Deep Purification of Concentrated Silver Nanoparticle Sols 浓缩纳米银颗粒溶胶深度净化的两阶段法

IF 1.1 4区化学

Colloid Journal Pub Date : 2026-04-14 DOI: 10.1134/S1061933X25601593

M. Yu. Flerko, S. A. Vorobyev, S. A. Novikova, A. S. Samoilo, D. V. Karpov, M. N. Volochaev

{"title":"Two-Stage Method for Deep Purification of Concentrated Silver Nanoparticle Sols","authors":"M. Yu. Flerko, S. A. Vorobyev, S. A. Novikova, A. S. Samoilo, D. V. Karpov, M. N. Volochaev","doi":"10.1134/S1061933X25601593","DOIUrl":"10.1134/S1061933X25601593","url":null,"abstract":"Owing to its simplicity and high efficiency, the citrate–sulfate method for the synthesis of silver nanoparticles could be employed for large-scale production of nanomaterials. However, the resulting silver sols are heavily contaminated with reaction by-products. To solve this problem, this study proposes a two-stage purification procedure for thorough removal of impurities from the synthesized silver sols without inducing their aggregation. At the first purification stage, silver sols are subjected to cyclic coagulation with sodium citrate solutions followed by decantation and peptization in deionized water. At the second stage, the remaining dissolved impurities are removed by deionization using a mixture of a “weak” cation exchanger in the H+ form and an anion exchanger in the OH– form. According to transmission electron microscopy, X-ray diffraction analysis, atomic emission spectroscopy, and IR spectroscopy data, the purity, stability, and size uniformity of the nanoparticles are improved progressively with each purification stage. The purified silver sols with concentrations as high as 250 g/L remain stable for a month and longer and can be concentrated by evaporation to 2145 g/L dispersions, which exhibit a low viscosity and an additive relation between their density and concentration.","PeriodicalId":521,"journal":{"name":"Colloid Journal","volume":"88 2","pages":"237 - 246"},"PeriodicalIF":1.1,"publicationDate":"2026-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147665705","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

Biopolymer-Based Magnetic Nanocomposites and Their Flocculating Properties 生物聚合物基磁性纳米复合材料及其絮凝性能

IF 1.1 4区化学

Colloid Journal Pub Date : 2026-03-18 DOI: 10.1134/S1061933X25601052

V. E. Proskurina, D. O. Sagdeev, S. S. Tuganov, L. R. Dyukina, E. B. Tsaturyan, Yu. G. Galyametdinov

{"title":"Biopolymer-Based Magnetic Nanocomposites and Their Flocculating Properties","authors":"V. E. Proskurina, D. O. Sagdeev, S. S. Tuganov, L. R. Dyukina, E. B. Tsaturyan, Yu. G. Galyametdinov","doi":"10.1134/S1061933X25601052","DOIUrl":"10.1134/S1061933X25601052","url":null,"abstract":"Magnetic flocculants based on Fe3O4 magnetite nanoparticles and natural polysaccharides (chitosan and apple and citrus pectins) have been synthesized. Magnetite has been functionalized at an optimal biopolymer : magnetite ratio of 5 : 1. Individual particles of magnetite, polysaccharides, and magnetic flocculants based thereon have been characterized by dynamic light scattering, IR spectroscopy, and СHN-analysis. NMR-relaxometry has been employed to show that the distribution of these systems in biological media can be studied using magnetic resonance tomography. The concentration of magnetic flocculants based on magnetite and natural polymers and the pH value of the medium have been varied to study their effects on the flocculating parameters of the system. Among the studied magnetic flocculants, chitosan-based magnetic flocculant (MFC) has the greatest flocculating effect at a concentration of 2 × 10–2 g/L. The efficiency of flocculation in a suspension of blue clay with the participation of MFC has been shown to increase in a highly alkaline pH region. It has been found that the sedimentation of clay with the participation of magnetic flocculants based on citrus and apple pectins occurs via a bridging flocculation mechanism, while the neutralization mechanism of flocculation is mainly realized with the participation of the MFC. It has been shown that the highly efficient multifunctional flocculant is selective for the separation of multicomponent disperse systems.","PeriodicalId":521,"journal":{"name":"Colloid Journal","volume":"88 2","pages":"188 - 197"},"PeriodicalIF":1.1,"publicationDate":"2026-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147665759","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

Preparation of Boron Nitride Nanosheets by Liquid-Phase Sonication: Selection of Dispersion Medium 液相超声法制备氮化硼纳米片：分散介质的选择

IF 1.1 4区化学

Colloid Journal Pub Date : 2026-03-18 DOI: 10.1134/S1061933X2560143X

N. S. Romanov, E. M. Bogomolova, E. A. Danilov

{"title":"Preparation of Boron Nitride Nanosheets by Liquid-Phase Sonication: Selection of Dispersion Medium","authors":"N. S. Romanov, E. M. Bogomolova, E. A. Danilov","doi":"10.1134/S1061933X2560143X","DOIUrl":"10.1134/S1061933X2560143X","url":null,"abstract":"Effect of 28 different dispersion media on the efficiency of liquid-phase ultrasonic exfoliation of hexagonal boron nitride has been investigated. The data on the coefficient of light absorption by the suspensions have been used to determine the Hansen solubility parameters for boron nitride nanosheets. The optimal ethanol content in a water/ethanol system has been found. The effects of the dispersion medium composition, exfoliation time, and initial concentration of hexagonal boron nitride on the efficiency of ultrasonic exfoliation and structural characteristics of the obtained nanosheets have been analyzed. The use of water/ethanol mixtures with ethanol contents of 33.3 and 66.7 vol % at an initial boron nitride concentration of 10 g/L has made it possible to reach 8 and 10% yields of nanosheets, respectively. The lateral sizes of the sheets are 630–680 nm and their thicknesses are below 25 nm. The conditions have been described for manufacturing suspensions with very high concentrations of boron nitride nanosheets equal to 3.3 g/L. Due to the high yield and the high aspect ratio (25 and higher) of the nanosheets, the process can be successfully used to prepare fillers and additives for composite materials, as well as suspensions for printing and film technologies.","PeriodicalId":521,"journal":{"name":"Colloid Journal","volume":"88 2","pages":"198 - 210"},"PeriodicalIF":1.1,"publicationDate":"2026-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147665760","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