Colloid Journal最新文献_第4页

Chrome–Polymer Composite as a Precursor for Obtaining a Sorbent with Selective Properties 铬-聚合物复合材料制备具有选择性吸附剂的前驱体

IF 1.1 4区化学

Colloid Journal Pub Date : 2025-06-25 DOI: 10.1134/S1061933X25600447

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

{"title":"Chrome–Polymer Composite as a Precursor for Obtaining a Sorbent with Selective Properties","authors":"V. Gutsanu, A.-M. Ipate, G. Lisa, M. Botnaru","doi":"10.1134/S1061933X25600447","DOIUrl":"10.1134/S1061933X25600447","url":null,"abstract":"A composite based on a cross-linked ionic polymer containing functional groups [–N(CH3)3]+ and a Cr3+ cation was obtained and studied. As a result of the contact of the polymer with the KCr(SO4)2 solution, the jarosite mineral-type composite is formed: R4N[Cr3(OH)6(SO4)2], in which R4N+ is the polymer group. Considering that the composite can be used as a sorbent with selective properties, its stability in solutions of KCl, Na2CO3, Na2SO4, NaNO3, NaF and Na2S was investigated. In concentrated NaCl solutions, the original composite is transformed into another, as a result of the replacement of ({text{SO}}_{4}^{{2 - }}) with Cl– ions. The regenerated polymer is capable of forming a composite again. Using FTIR, SEM EDX and thermogravimetry methods, the changes that occur in the polymer phase during composite formation and its regeneration were studied. It has been shown that the composite has selective sorption properties.","PeriodicalId":521,"journal":{"name":"Colloid Journal","volume":"87 3","pages":"408 - 422"},"PeriodicalIF":1.1,"publicationDate":"2025-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145144940","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

Processes of Structure Formation in Aqueous Poly(vinyl alcohol) Solutions Under Vacuum Ultraviolet Irradiation 真空紫外照射下聚乙烯醇水溶液结构形成过程的研究

IF 1.1 4区化学

Colloid Journal Pub Date : 2025-06-25 DOI: 10.1134/S1061933X24601331

N. V. Nekrasova, O. A. Khlebnikova, V. A. Lomovskoy, V. V. Vysotskii, A. D. Krot

引用次数: 0

Superhydrophobic Coating Based on EP-140 Epoxy Enamel: A Study of Mechanical Endurance under External Actions EP-140环氧磁漆超疏水涂层的力学耐久性研究

IF 1.1 4区化学

Colloid Journal Pub Date : 2025-06-25 DOI: 10.1134/S1061933X25600307

E. A. Kuzina, M. A. Teplonogova, A. V. Buglak, K. A. Emelyanenko

{"title":"Superhydrophobic Coating Based on EP-140 Epoxy Enamel: A Study of Mechanical Endurance under External Actions","authors":"E. A. Kuzina, M. A. Teplonogova, A. V. Buglak, K. A. Emelyanenko","doi":"10.1134/S1061933X25600307","DOIUrl":"10.1134/S1061933X25600307","url":null,"abstract":"This work is devoted to studying mechanical durability of a superhydrophobic coating obtained on the basis of commercial EP-140 epoxy enamel. To achieve the superhydrophobic state, the applied coating is modified by pulsed laser texturing and fluorosilane chemisorption. The goal of the research is to assess the coating resistance to various mechanical actions typical for outdoor service, namely, long-term contact with water, exposure to high-speed water jet, abrasive wear under the action of falling sand, and multiple detachments of an adhesive tape. It has been shown that the combined approach used for the superhydrophobization provides coatings not only with pronounced water-repellent properties but also with significant resistance to degradation. For example, the performed experiments have revealed only a slight decrease in the wettability characteristics with retaining the heterogeneous wetting regime, thereby confirming that the coating retains its functionality even under extremal mechanical impacts. The data obtained have indicated the promise of applying the developed coating in industry fields that require a combination of high wear resistance and economic efficiency.","PeriodicalId":521,"journal":{"name":"Colloid Journal","volume":"87 3","pages":"365 - 372"},"PeriodicalIF":1.1,"publicationDate":"2025-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145144918","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

Green Synthesis Silver Nanoparticles Based on Polysaccharides Extract of Amanita pantherina: Electrochemical Characteristics and Antibacterial Activity 基于黑金伞多糖提取物的绿色合成纳米银：电化学特性及抗菌活性

IF 1.1 4区化学

Colloid Journal Pub Date : 2025-05-28 DOI: 10.1134/S1061933X24601513

H. T. Nguyen, H. T. Nguyen, N. H. Nguyen, Q. H. Tran, P. D. N. Nguyen, P. H. Nguyen, L. M. Hoang, T. V. H. Truong, T. T. N. Truong, D. C. To

{"title":"Green Synthesis Silver Nanoparticles Based on Polysaccharides Extract of Amanita pantherina: Electrochemical Characteristics and Antibacterial Activity","authors":"H. T. Nguyen, H. T. Nguyen, N. H. Nguyen, Q. H. Tran, P. D. N. Nguyen, P. H. Nguyen, L. M. Hoang, T. V. H. Truong, T. T. N. Truong, D. C. To","doi":"10.1134/S1061933X24601513","DOIUrl":"10.1134/S1061933X24601513","url":null,"abstract":"Mushroom polysaccharides are biologically active substances with strong reduction, capture, and stabilization capabilities. They have great potential in the synthesis of metal nanoparticles. This study developed a method for the electrochemical synthesis of silver nanoparticles from polysaccharide extracts (AgNP-AcPOLY) of the Amanita pantherina mushroom. Silver nanoparticles (AgNPs) were characterized using X-ray diffraction (XRD), transmission electron microscopy (TEM), electrophoretic light scattering (ELS), UV-vis spectroscopic (UV-Vis), and laser diffraction spectroscopy (LDS) methods. XRD and TEM studies showed that the silver nanoparticles are spherical with a size of about 11.6 nm. The electrochemical performance of AgNP-AcPOLY nanoparticles was evaluated by cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). The results indicate that AgNP-AcPOLY exhibits outstanding electrochemical properties, significantly enhancing the performance of screen-printed electrodes (SPE). In addition, the antibacterial activity of nanosilver was evaluated through the methods of minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) against two strains of bacteria, Staphylococcus aureus and Escherichia coli. The results of this study indicate that the silver nanoparticles synthesized from the polysaccharide extract of A. pantherina are clean and environmentally friendly and have broad-spectrum antibacterial ability.","PeriodicalId":521,"journal":{"name":"Colloid Journal","volume":"87 3","pages":"423 - 431"},"PeriodicalIF":1.1,"publicationDate":"2025-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145144864","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

Microwave Assisted Au Nanoparticles Production Using Waste Avocado Seed Extract: Characterization, Antioxidant, and Antibacterial Activities 利用废弃鳄梨籽提取物微波辅助金纳米颗粒生产：表征，抗氧化和抗菌活性

IF 1.1 4区化学

Colloid Journal Pub Date : 2025-05-28 DOI: 10.1134/S1061933X24601483

K. Ramesh, G. Bhagavanth Reddy, Venkatramulu Gopi, M. Noorjahan

{"title":"Microwave Assisted Au Nanoparticles Production Using Waste Avocado Seed Extract: Characterization, Antioxidant, and Antibacterial Activities","authors":"K. Ramesh, G. Bhagavanth Reddy, Venkatramulu Gopi, M. Noorjahan","doi":"10.1134/S1061933X24601483","DOIUrl":"10.1134/S1061933X24601483","url":null,"abstract":"This study presents a rapid and eco-friendly approach to synthesize gold nanoparticles (AuNPs) using waste avocado seed extract (AV) as a reducing and capping agent. Microwave irradiation enables the synthesis of AuNPs within a minute, as evidenced by the solution’s characteristic red color and confirmed by a surface plasmon resonance (SPR) peak at ~530 nm in the UV-visible spectrum. Synthesis parameters, including pH and concentrations of AV and gold chloride, were optimized, revealing that mild alkaline conditions favor AuNP formation, while acidic conditions are detrimental. The AuNPs, characterized by transmission electron microscopy (TEM), exhibited a small size (9.9 ± 3.6 nm) and spherical morphology without aggregation. X-ray diffraction (XRD) confirmed the face-centered cubic (FCC) crystal structure of the AuNPs, and Fourier transform infrared (FTIR) spectroscopy indicated the involvement of functional groups in AV in the reduction and stabilization of the nanoparticles. The AV@AuNPs demonstrated excellent stability, as indicated by a high negative zeta potential (–27.0 ± 6.4 mV). Additionally, the nanoparticles showed strong antioxidant activity comparable to ascorbic acid and significant antibacterial efficacy against both Gram-positive (S. aureus and B. subtilis) and Gram-negative (E. coli and P. aeruginosa) bacteria, with a pronounced effect on Gram-negative strains.","PeriodicalId":521,"journal":{"name":"Colloid Journal","volume":"87 3","pages":"432 - 441"},"PeriodicalIF":1.1,"publicationDate":"2025-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145144896","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

A Study of Cryostructuring of Polymeric Systems. 69. Physicomechanical and Thermophysical Properties of Poly(vinyl alcohol) Cryogels Formed in the Presence of Nonprotonated and Salt Forms of Basic α-Amino Acids 高分子体系的低温结构研究[j]。在碱性α-氨基酸非质子化和盐态存在下形成的聚乙烯醇低温冰箱的物理、力学和热物理性质

IF 1.1 4区化学

Colloid Journal Pub Date : 2025-05-28 DOI: 10.1134/S1061933X25600150

O. Yu. Kolosova, E. O. Abramova, V. P. Chernyshev, V. I. Lozinsky

{"title":"A Study of Cryostructuring of Polymeric Systems. 69. Physicomechanical and Thermophysical Properties of Poly(vinyl alcohol) Cryogels Formed in the Presence of Nonprotonated and Salt Forms of Basic α-Amino Acids","authors":"O. Yu. Kolosova, E. O. Abramova, V. P. Chernyshev, V. I. Lozinsky","doi":"10.1134/S1061933X25600150","DOIUrl":"10.1134/S1061933X25600150","url":null,"abstract":"Macroporous physical (noncovalent) cryogels have been prepared via freezing at –20°C for 12 h followed defrosting by heating at a rate of 0.03°C/min of aqueous poly(vinyl alcohol) (PVA) solutions without and with additives (0.1–0.5 mol/L) of basic α-amino acids (arginine, histidine, lysine, ornithine) in nonprotonated or salt forms, and the influence of such additives on the physicochemical properties of the gel materials formed in this way has been studied. It has been shown that additives of arginine, its hydrochloride, as well as histidine, exhibit a chaotropic action on the cryotropic gelation of PVA by hindering hydrogen bonding, thus leading to a decrease in the elasticity and heat endurance of the resultant cryogels, whereas additives of lysine, ornithine and their hydrochlorides, as well as histidine hydrochloride, act as kosmotropic agents causing an increase in the compressive elasticity modulus and the fusion temperature of the samples due to the promotion of hydrogen bonding. The kinetic study of releasing amino acid additives used in the work has shown that the hydrochlorides are released from a gel carrier into an external aqueous environment somewhat slower than are nonprotonated forms, but without noticeable diffusion hindrances in all cases. Taking into account that such amino acids are used in cosmetology, the results obtained in this study suggest that PVA cryogels loaded with amino acid additives may be of practical interest when developing carriers for cosmetics such as nourishing masks, coatings for problem areas of skin, “patches”, etc.","PeriodicalId":521,"journal":{"name":"Colloid Journal","volume":"87 3","pages":"352 - 364"},"PeriodicalIF":1.1,"publicationDate":"2025-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145144899","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

Application of Machine Learning for Predicting Phase Behavior of Interpolyelectrolyte Complexes in Water–Salt Media 机器学习在水盐介质中多电解质配合物相行为预测中的应用

IF 1.1 4区化学

Colloid Journal Pub Date : 2025-05-28 DOI: 10.1134/S1061933X25600137

I. V. Grigoryan, L. A. Antiufrieva, A. P. Grigoryan, A. A. Korigodskii, C. Junyang, Y. Shuxiong, V. A. Pigareva, A. E. Tishchenko, G. B. Khomutov, A. V. Sybachin

引用次数: 0

Optically Active Films Based on AOT-Stabilized Silver Organosol 基于aot稳定银有机溶胶的光学活性膜

IF 1.1 4区化学

Colloid Journal Pub Date : 2025-05-28 DOI: 10.1134/S1061933X25600149

V. V. Bocharov, V. S. Sulyaeva, A. N. Kolodin

引用次数: 0

Development of Research on Graphene-Based Nanofluids as Heat Carriers in Direct Absorption Solar Collectors 石墨烯基纳米流体作为直接吸收太阳能集热器热载体的研究进展

IF 1.1 4区化学

Colloid Journal Pub Date : 2025-05-28 DOI: 10.1134/S1061933X25600186

Q. T. Tran, I. A. Mikhailova, I. N. Pavlov, E. I. Ibragimova

引用次数: 0

Micelle-Forming and Antimicrobial Properties of a Series of Bis-Quaternized Ammonium Compounds Based on DABCO Derivatives 一系列基于DABCO衍生物的双季铵盐化合物的胶束形成和抗菌性能