{"title":"The Effects of Shear Parameters on the Stability of Emulsion Explosive Matrices","authors":"Jianmin Zhou, Yongsheng Jia, Yingkang Yao, Xianqi Xie, Mingsheng Zhao","doi":"10.1134/s1061933x23600872","DOIUrl":"https://doi.org/10.1134/s1061933x23600872","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>This work demonstrated the criterion of shear stability of emulsion explosive matrices (EEM), combined with rheology test, interfacial tension test, droplet size test and the crystallization test of emulsion explosive matrices. The shear stability of emulsion explosive matrices was defined as the characteristic refinement time of the droplet size decrease in emulsification process. The constitutive relationship between the characteristic refinement time and droplet size of inner phase droplets was proposed by theoretical analysis and experiments on the emulsification process of emulsion explosive matrices. By analyzing the relationship between rheological properties and characteristic refinement time of emulsion explosive matrices, the relationship model between Bingham coefficient and dimensionless coefficient was established to characterize the shear stability of emulsion explosive matrices. The effects of shear strength, shear time and shear shape on the stability of emulsion explosive matrices were studied. In addition, there exists a critical value to quantitatively characterize the shear stability of emulsion explosive matrices.</p>","PeriodicalId":521,"journal":{"name":"Colloid Journal","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2024-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139919504","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}
Colloid JournalPub Date : 2024-02-20DOI: 10.1134/s1061933x23600987
M. G. Chernysheva, G. A. Badun, A. G. Popov, I. S. Chashchin, N. M. Anuchina, A. V. Panchenko
{"title":"Preparation of Nanodiamond–Lysozyme–Miramistin Composite and Prospects of Its Application in Heart Valve Prosthetics","authors":"M. G. Chernysheva, G. A. Badun, A. G. Popov, I. S. Chashchin, N. M. Anuchina, A. V. Panchenko","doi":"10.1134/s1061933x23600987","DOIUrl":"https://doi.org/10.1134/s1061933x23600987","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>Creation of biocompatible coatings for xenogenic materials that can be used to manufacture prosthetic heart valves is an urgent and, unfortunately, still unsolved problem. It is necessary to obtain a biomaterial that would comply with the mechanical characteristics of a human valve and possess antimicrobial properties, which are of critical importance during the first postsurgical days. Biocompatible coatings can be used for this purpose, and it has turned out that detonation nanodiamonds are suitable for their preparation. The developed functional surface of nanodiamonds allows them to adsorb antibiotics; nanodiamonds are nontoxic and do not cause additional calcification. In this study, we have proposed to prepare a composite coating composed of nanodiamonds, lysozyme, and miramistin as broad-spectrum antimicrobial agents. The use of tritium-labeled nanodiamonds has made it possible to study the distribution of nanodiamond–lysozyme complexes after intravenous administration to mice and showed that the majority of the material remains at the place of injection. It has been shown that nanodiamond–lysozyme–miramistin composites exhibit strong antimicrobial activity, while the nanodiamond–miramistin complex shows no toxicity with respect to <i>Staphylococcus aureus</i>. Thus, the nanodiamond–lysozyme–miramistin composite can be used to create coatings for materials of prosthetic heart valves.</p>","PeriodicalId":521,"journal":{"name":"Colloid Journal","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2024-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139919642","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}
Colloid JournalPub Date : 2024-02-20DOI: 10.1134/s1061933x23601051
D. M. Kuznetsov, D. A. Kuznetsova, F. G. Valeeva, L. Ya. Zakharova
{"title":"New Polyfunctional Biamphiphilic Surfactants Based on Alkylmethylmorpholinium Cation and Dodecyl Sulfate Anion","authors":"D. M. Kuznetsov, D. A. Kuznetsova, F. G. Valeeva, L. Ya. Zakharova","doi":"10.1134/s1061933x23601051","DOIUrl":"https://doi.org/10.1134/s1061933x23601051","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>New biamphiphilic surfactants (BSs) have been synthesized based on alkylmethylmorpholinium cation and dodecyl sulfate anion (Mor-<i>n</i>(DS), <i>n</i> = 4, 6, 8, 10). The structure of the biamphiphiles has been characterized by IR spectroscopy, <sup>1</sup>H NMR spectroscopy, mass spectrometry, and elemental analysis. The aggregation behavior of the biamphiphiles in aqueous solutions has been assessed by tensiometry, conductometry, fluorescence spectroscopy (using a pyrene probe) and dynamic and electrophoretic light scattering. It has been shown that an increase in the hydrophobic tail length by two carbon atoms in an amphiphilic cation leads to an increase in the surface activity of the surfactant by ~5 units and a decrease in the aggregation threshold of the systems by 1.5–2 times. It has been established that the formation of aggregates with hydrodynamic diameters of 20–120 nm depending on the alkyl chain length of the alkylmethylmorpholinium cation and BS concentration. The zeta potential of the systems ranges from –25 to –100 mV and decreases with increasing biamphiphile concentration. Spectrophotometry has been employed to show a significant solubilization capacity of the biamphiphiles with respect to a hydrophobic dye Orange OT. The compounds obtained may be of interest for biomedical applications and other high-tech areas.</p>","PeriodicalId":521,"journal":{"name":"Colloid Journal","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2024-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139919498","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}
Colloid JournalPub Date : 2024-02-20DOI: 10.1134/s1061933x23601117
O. A. Kangina, M. G. Chernysheva, G. A. Badun, A. V. Lishai, N. G. Tsygankova, T. A. Savitskaya, D. D. Grinshpan
{"title":"Anionic Surfactant Adsorption on Activated Carbons Produced from Lignin and Modified with Cellulose Sulfoacetate","authors":"O. A. Kangina, M. G. Chernysheva, G. A. Badun, A. V. Lishai, N. G. Tsygankova, T. A. Savitskaya, D. D. Grinshpan","doi":"10.1134/s1061933x23601117","DOIUrl":"https://doi.org/10.1134/s1061933x23601117","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>This work is devoted to studying the adsorption of sodium dodecyl sulfate (SDS) and sodium N-lauryl sarcosinate (NLS) on activated carbons produced from hydrolytic lignin using laboratory and pilot setups. Commercially available activated carbons produced by “Sorbent” Ltd. and SKT-3 are used for comparison. The surface of the activated carbons is modified (hydrophilized) by cellulose sulfoacetate (CSA) adsorption from aqueous solutions. Amounts of surfactants adsorbed on the activated carbon surface are determined from their radioactivity using tritium-labeled compounds. It has been found that the maximum adsorption of anionic surfactants is higher on activated carbons obtained from lignin. Adsorption values in the saturation region are 1.7 and 1.5 mmol/g for SDS and NLS on activated carbons obtained from lignin and 0.8 mmol/g for both surfactants adsorbed on commercial carbons. It has been shown that the preliminary application of CSA does not affect the maximum adsorption of NLS at its high concentrations; however, it reduces its adsorption in the initial region of the isotherm. Adsorption of CSA and its ability to be retained on the surface of the activated carbons is also studied. Tritium-labeled CSA has been used to show that the isotherm of its adsorption on activated carbon obtained from lignin is S-shaped beginning from a concentration of 0.5 g/L and reaches a maximum value of 25 mg/g. In the presence of NLS, the polymer is desorbed from the carbon surface by more than 50%.</p>","PeriodicalId":521,"journal":{"name":"Colloid Journal","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2024-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139919641","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}
Colloid JournalPub Date : 2024-02-20DOI: 10.1134/s1061933x23601142
A. G. Bykov, M. A. Panaeva, A. R. Rafikova, N. A. Volkov, A. A. Vanin
{"title":"Influence of Composition and Temperature on Dynamic Properties of Mixed Monolayers of Pulmonary Lipids","authors":"A. G. Bykov, M. A. Panaeva, A. R. Rafikova, N. A. Volkov, A. A. Vanin","doi":"10.1134/s1061933x23601142","DOIUrl":"https://doi.org/10.1134/s1061933x23601142","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The main component of pulmonary surfactant is dipalmitoyl phosphatidylcholine (DPPC), which reduces the surface tension almost to zero when the lung surface is compressed, thus preventing the alveolus from collapse in the course of exhalation. In this work the methods of the surface rheology have been employed to determine the influence of six pulmonary lipids on the dynamic surface properties of a DPPC monolayer at different temperatures and in a wide range of surface tensions. Particular attention has been paid to the region of low surface tensions (lower than 25 mN/m) at temperatures of 25 and 35°С, with these conditions being close to the physiological state on the internal surface of lungs. The addition of lipids with similar molecular structures to DPPC does not affect significantly the dynamic surface properties at a temperature of 25°C. At the same time, the addition of these lipids increases the surface elasticity in the region of low surface tensions at 35°С. However, under these conditions, the presence of lipids with unsaturated hydrocarbon radicals in the surface layer leads to the opposite effect and hinders the achievement of low surface tensions during slow compression. The results obtained have shown the possibility to control the properties of the lipid/DPPC mixed monolayer, which can be considered which can be considered as a model of pulmonary surfactant.</p>","PeriodicalId":521,"journal":{"name":"Colloid Journal","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2024-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139919499","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}
Colloid JournalPub Date : 2024-02-20DOI: 10.1134/s1061933x23600860
Mazen Alrahili
{"title":"Single Silver Nanoparticles: Local Refractive Index Response to Localized Surface Plasmon Resonance and Molar Attenuation Coefficient","authors":"Mazen Alrahili","doi":"10.1134/s1061933x23600860","DOIUrl":"https://doi.org/10.1134/s1061933x23600860","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>In this paper, we analyze the optical properties and sensitivities of spherical silver nanoparticles (AgNPs) with varying diameters (10–60 nm) in different surrounding medium, including water, ethanol, and chloroform. The investigation focuses on analytically assessing scattering efficiencies (<span>({{Q}_{{{text{sca}}}}})</span>), absorption efficiencies (<span>({{Q}_{{{text{abs}}}}})</span>), total extinction efficiencies (<span>({{Q}_{{{text{ext}}}}})</span>), shedding light on how the properties of AgNPs change with the size and surrounding medium of AgNPs. The results show that smaller AgNPs exhibit sharper plasmon resonance peaks at shorter wavelengths, while larger AgNPs display broader peaks in the visible spectrum, showcasing the size-dependent behavior of AgNPs. Additionally, the study calculates the molar attenuation coefficient (ε) and extinction cross section (<span>({{sigma }_{{{text{ext}}}}})</span>) for AgNPs, highlighting the differences in absorption properties between small and large particles and their sensitivity to the surrounding medium. The research also discusses the implications of these properties for applications such as plasmonic sensing and sensor design, emphasizing the importance of particle size and surrounding medium in optimizing sensor performance. Moreover, the refractive index sensitivity (S) and the figure of merit (FOM) are introduced as critical parameters for assessing sensor performance, revealing their relationship with particle size, and providing valuable insights into sensor design and optimization.</p>","PeriodicalId":521,"journal":{"name":"Colloid Journal","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2024-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139919871","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}
Colloid JournalPub Date : 2024-02-01DOI: 10.1134/s1061933x23601324
L. Boinovich, A. Emelyanenko, M. A. Kalinina
{"title":"Editorial Column","authors":"L. Boinovich, A. Emelyanenko, M. A. Kalinina","doi":"10.1134/s1061933x23601324","DOIUrl":"https://doi.org/10.1134/s1061933x23601324","url":null,"abstract":"","PeriodicalId":521,"journal":{"name":"Colloid Journal","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140468292","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}
Colloid JournalPub Date : 2024-02-01DOI: 10.1134/s1061933x23601002
{"title":"Colloidal Properties of Sophora Japanese Fruit Dispersion","authors":"","doi":"10.1134/s1061933x23601002","DOIUrl":"https://doi.org/10.1134/s1061933x23601002","url":null,"abstract":"<span> <h3>Abstract</h3> <p>Drug plant raw materials represent an important source of biologically active substances (BASs), which are used in pharmaceutical, cosmetic, food, and other industries. This paper presents the results of studying colloidal properties of crushed sophora Japanese fruits (hereinafter referred to as sophora) in order to improve the extraction of BASs. To achieve the goal, the following tasks have been set: the study of the ζ potential of sophora particles at different times of contact between the particles and an extractant and the pH values of the medium; determining the isoelectric point (IEP) of the sophora particles by electrophoresis; finding the point of zero charge (PZC) of sophora particles using potentiometric titration; and studying the influence of medium pH, sophora particle size, temperature, the presence of surfactants and ions, and the nature of an extractant on sophora swelling. The points of zero charge <span> <span>({text{(p}}{{{text{H}}}_{{{text{PZC}}}}})</span> </span>) of the aqueous dispersions of sophora and extracted flavonoids are 5.8 and 5.2, respectively, thus being close to the values <span> <span>({text{p}}{{{text{H}}}_{{{text{IEP}}}}})</span> </span>. The swelling of sophora particles is limited and accompanied by the gradual fracture of the plant cells. Adsorption equilibrium is achieved within 30 min. In an alkaline region and in the presence of alcohol, the swelling of the sophora particles decreases, while it increases at elevated temperature and in the presence of NaI ions.</p> </span> <span> <span> <img alt=\"\" src=\"https://static-content.springer.com/image/MediaObjects/10595_2024_8497_Fig1_HTML.png\"/> </span> </span>","PeriodicalId":521,"journal":{"name":"Colloid Journal","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140169767","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}
Colloid JournalPub Date : 2024-01-26DOI: 10.1134/s1061933x23600902
Q. T. Tran, A. S. Dmitriev, P. G. Makarov, I. A. Mikhailova
{"title":"Experimental Study of Evaporation of Nanofluid Droplets on Substrates under Solar Radiation","authors":"Q. T. Tran, A. S. Dmitriev, P. G. Makarov, I. A. Mikhailova","doi":"10.1134/s1061933x23600902","DOIUrl":"https://doi.org/10.1134/s1061933x23600902","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>This work is devoted to the experimental study of evaporating droplets of titania-, silica-, and diamond-based nanofluids on a substrate under solar radiation. The influence of various factors, including the type of a material, concentration of nanocomponents, irradiation direction, droplet volume, and substrate material, on the droplet evaporation has been investigated. As a result, the critical concentrations of nanoparticles, at which the evaporation rate reaches a stable level, have been determined for droplets of the studied nanofluids. The regimes and stages of the droplet evaporation process have been analyzed for the cases of the subcritical and critical nanoparticle concentrations. The efficiency of droplet evaporation under solar radiation has been shown to strongly depend on radiation direction. The effects of droplet volume and substrate material on the evaporation rate have been studied. In addition to the evaporation efficiency, the morphology of the structures deposited from the droplets has been analyzed. It has been shown that these structures depend on the concentration and material of nanoparticles, as well as on the regime of droplet evaporation. The results of this study enable one to gain a deeper insight into the behavior of the droplets during evaporation under irradiation especially in the IR region and confirm the promise of application of nanofluids in the solar thermal energy systems.</p>","PeriodicalId":521,"journal":{"name":"Colloid Journal","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2024-01-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139580721","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}
Colloid JournalPub Date : 2024-01-26DOI: 10.1134/s1061933x23600665
D. A. Michurov, O. Yu. Kolosova, V. I. Lozinsky
{"title":"Study of Cryostructuring of Polymer System. 66. Properties and Microstructure of Poly(vinyl alcohol) Cryogels Formed in Frozen Dimethyl Sulfoxide with Additives of Urea and Then Hydrated by Replacing Organic Medium with Water","authors":"D. A. Michurov, O. Yu. Kolosova, V. I. Lozinsky","doi":"10.1134/s1061933x23600665","DOIUrl":"https://doi.org/10.1134/s1061933x23600665","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>“Primary” poly(vinyl alcohol) (PVA) cryogels have been obtained by cryogenic processing (freezing at –21.6°C for 12 h followed by defrosting via heating to 20°C at a rate of 0.03°C/min) of a 100 g/L solution of PVA in dimethyl sulfoxide (DMSO) in the absence and presence of urea (2 or 4 mol/L), which exhibits kosmotropic properties in such a medium. Subsequent hydration of the cryogels by replacing DMSO with water causes a decrease in the volume and weight of the samples, as well as leads to a significant increase in the elasticity modulus of resulting “secondary” cryogels. The absolute magnitude of such effects depends both on the concentration of urea in an initial PVA solution and on the volume ratio between gel samples and an aqueous extractant during their hydration. Using optical microscopy, it has been found that the presence of urea in the initial DMSO polymer solution in a concentration close to the limit of its solubility in such a medium induces the formation of a gel matrix with a wide-pore morphology. Since high-modulus secondary PVA cryogels are of great interest as materials for biomedical applications, the possibility of their functioning as carriers of drug delivery systems has been assessed in the work. Ibuprofen sodium salt has been used as a model drug. The analysis of the release kinetics of this substance within the framework of the Weibull function has been employed to show that the dynamic hydrogen bonding of its carboxylate groups with the hydroxyl groups of PVA decelerates the release of the drug from the polymer carrier, i.e., prolongs the release process. At the same time, the rate of the process depends on the urea content in the initial polymer solution most likely due to microstructural differences between the polymer phases of the macropore walls in the cryogel matrix.</p>","PeriodicalId":521,"journal":{"name":"Colloid Journal","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2024-01-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139590441","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}