Colloids and Interfaces最新文献_第2页

Dynamic Interfacial Properties and Foamability of DoTAB/SiO2 Mixtures DoTAB/SiO2 混合物的动态界面特性和发泡性

IF 2.4

Colloids and Interfaces Pub Date : 2024-03-11 DOI: 10.3390/colloids8020019

Fariza Amankeldi, M. Gabdullin, M. Issakhov, Z. Ospanova, A. Sharipova, S. Aidarova, Reinhard Miller

{"title":"Dynamic Interfacial Properties and Foamability of DoTAB/SiO2 Mixtures","authors":"Fariza Amankeldi, M. Gabdullin, M. Issakhov, Z. Ospanova, A. Sharipova, S. Aidarova, Reinhard Miller","doi":"10.3390/colloids8020019","DOIUrl":"https://doi.org/10.3390/colloids8020019","url":null,"abstract":"The interaction between nanoparticles and cationic surfactants is an exciting and emerging field in interfacial science. This area of research holds significant promise, linking fundamental principles to practical applications in a variety of industries, including chemical processes, biomedical applications and the petroleum industry. This study explores the interaction between dodecyltrimethylammonium bromide (DoTAB) and silica (SiO2) nanoparticles, investigating their influence on dynamic interfacial properties and foam characteristics. Through equilibrium and dynamic surface tension measurements, along with examining the dilational visco-elasticity behavior, this research reveals the complex surface behavior of DoTAB/SiO2 mixtures compared to individual surfactant solutions. The foamability and stability experiments indicate that the addition of SiO2 significantly improves the foam stability. Notably, stable foams are achieved at low SiO2 concentrations, suggesting a cost-effective approach to enhancing the foam stability. This study identifies the optimal stability conditions for 12 mM DoTAB solutions, emphasizing the crucial role of the critical aggregation concentration region. These findings offer valuable insights for designing surfactant-nanoparticle formulations to enhance foam performance in various industrial applications.","PeriodicalId":10433,"journal":{"name":"Colloids and Interfaces","volume":null,"pages":null},"PeriodicalIF":2.4,"publicationDate":"2024-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140251798","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The Synthesis and Reactivity of Mesoporous and Surface-Rough Vinyl-Containing ORMOSIL Nanoparticles 介孔和表面粗糙的含乙烯基 ORMOSIL 纳米粒子的合成与反应活性

IF 2.4

Colloids and Interfaces Pub Date : 2024-03-07 DOI: 10.3390/colloids8020018

Nathan I. Walton, Eric M. Brozek, Courtney C. Gwinn, I. Zharov

{"title":"The Synthesis and Reactivity of Mesoporous and Surface-Rough Vinyl-Containing ORMOSIL Nanoparticles","authors":"Nathan I. Walton, Eric M. Brozek, Courtney C. Gwinn, I. Zharov","doi":"10.3390/colloids8020018","DOIUrl":"https://doi.org/10.3390/colloids8020018","url":null,"abstract":"Silica nanoparticles synthesized solely from organosilanes naturally possess a greater number of organic functionalities than silica nanoparticles surface-modified with organosilanes. We report the synthesis of organically modified silica (ORMOSIL) nanoparticles with a mesoporous and surface-rough morphology and with a high surface area, made solely from vinyltrimethoxy silane. We chemically modified these vinyl silica nanoparticles using bromination and hydroboration, and demonstrated the high accessibility and reactivity of the vinyl groups with an ~85% conversion of the functional groups for the bromination of both particle types, a ~60% conversion of the functional groups for the hydroboration of surface-rough particles and a 90% conversion of the functional groups for the hydroboration of mesoporous particles. We determined that the mesoporous vinyl silica nanoparticles, while having a surface area that lies between the non-porous and surface-rough vinyl silica nanoparticles, provide the greatest accessibility to the vinyl groups for boronation and allow for the incorporating of up to 3.1 × 106 B atoms per particle, making the resulting materials attractive for boron neutron capture therapy.","PeriodicalId":10433,"journal":{"name":"Colloids and Interfaces","volume":null,"pages":null},"PeriodicalIF":2.4,"publicationDate":"2024-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140260426","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Influence of Surface Roughness on Interfacial Properties of Particle Networks 表面粗糙度对粒子网络界面特性的影响

IF 2.4

Colloids and Interfaces Pub Date : 2024-03-04 DOI: 10.3390/colloids8020017

E. L. Correia, Nick Brown, D. Papavassiliou, Sepideh Razavi

{"title":"Influence of Surface Roughness on Interfacial Properties of Particle Networks","authors":"E. L. Correia, Nick Brown, D. Papavassiliou, Sepideh Razavi","doi":"10.3390/colloids8020017","DOIUrl":"https://doi.org/10.3390/colloids8020017","url":null,"abstract":"The behavior of colloidal particles near fluid interfaces has attracted significant scientific interest, as particles minimize the contact area between the two fluid phases, stabilizing interfacial systems. This study explores the influence of surface roughness on the properties of particle monolayers at the air–water interface, focusing on colloidal silica particles and fumed silica particles of similar hydrodynamic diameter. This research involves comparing low-surface-area (LSA) and medium-surface-area (MSA) fumed silica particles with spherical colloidal silica particles (250 nm in diameter). Utilizing a Langmuir trough, the interfacial particle networks are compressed and expanded. Analysis of surface pressure isotherms reveals that fumed silica particle monolayers form networks at a lower particle surface coverage compared to spherical particles. The spherical particle monolayer exhibits a higher apparent surface elasticity, indicating greater resistance to the applied compression compared to fumed silica networks. Additionally, monolayers formed by fumed silica particles display hysteresis even after successive compressions and expansions due to irreversible particle interlocking and the formation of multilayered aggregates. These findings provide insights into the impact of surface roughness on the behavior of particle monolayers at fluid interfaces, offering valuable information for designing and optimizing mechanisms involved in emulsion and foam stabilization.","PeriodicalId":10433,"journal":{"name":"Colloids and Interfaces","volume":null,"pages":null},"PeriodicalIF":2.4,"publicationDate":"2024-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140265382","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Ionic Strength Effect in the Equilibrium and Rheological Behavior of an Amphiphilic Triblock Copolymer at the Air/Solution Interface 空气/溶液界面上两性三嵌段共聚物的平衡和流变行为中的离子强度效应

IF 2.4

Colloids and Interfaces Pub Date : 2024-03-01 DOI: 10.3390/colloids8020016

Carlo Carbone, E. Guzmán, J. Maldonado-Valderrama, Ramón G. Rubio, F. Ortega

{"title":"Ionic Strength Effect in the Equilibrium and Rheological Behavior of an Amphiphilic Triblock Copolymer at the Air/Solution Interface","authors":"Carlo Carbone, E. Guzmán, J. Maldonado-Valderrama, Ramón G. Rubio, F. Ortega","doi":"10.3390/colloids8020016","DOIUrl":"https://doi.org/10.3390/colloids8020016","url":null,"abstract":"This study investigates the effect of an inert salt (NaCl) on the equilibrium interfacial tension and dilatational modulus of Pluronic F-68 copolymer, a triblock copolymer consisting of two terminal blocks of poly(ethylene oxide) and a less hydrophilic central block of poly(propylene oxide). Interfacial tension measurements were carried out using a surface force balance and a drop shape tensiometer, while rheological measurements were carried out in two different frequency ranges. This involved the use of the oscillatory barrier/droplet method and electrocapillary wave measurements, complemented by an appropriate theoretical framework. This work aimed to elucidate the influence of NaCl on the interfacial behavior of Gibbs monolayers of Pluronic F-68. In addition, this study highlights some of the technical and theoretical limitations associated with obtaining reliable dilatational rheological data at high frequencies (<1 kHz) using electrocapillary wave measurements. The results provide valuable insights into the interplay between salt presence and interfacial properties of Pluronic F-68 and highlight the challenges of obtaining accurate dilatational rheological data under specific measurement conditions.","PeriodicalId":10433,"journal":{"name":"Colloids and Interfaces","volume":null,"pages":null},"PeriodicalIF":2.4,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140082758","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Correction: Veronico et al. Enhancing Oil-Uptake Efficiency with an Alkyl Polyglycoside–Dodecanol Formulation. Colloids Interfaces 2024, 8, 6 更正：Veronico 等人，《用烷基聚糖苷-十二醇配方提高吸油效率》。胶体界面 2024，8，6

IF 2.4

Colloids and Interfaces Pub Date : 2024-02-29 DOI: 10.3390/colloids8020015

Lorenzo Veronico, Giuseppe Colafemmina, Luigi Gentile

引用次数: 0

A New Method for Calculating the Hamaker Constant Based on the Hansen Solubility Parameters for Non-Polar Liquids 根据非极性液体的汉森溶解度参数计算哈马克常数的新方法

IF 2.4

Colloids and Interfaces Pub Date : 2024-02-22 DOI: 10.3390/colloids8020014

H. Ohshima, Shin-ichi Takeda

引用次数: 0

Polymer–Zeolite Composites: Synthesis, Characterization and Application 聚合物-沸石复合材料：合成、表征与应用

IF 2.4

Colloids and Interfaces Pub Date : 2024-01-09 DOI: 10.3390/colloids8010008

G. Mamytbekov, Dmitry Anatol’evich Zheltov, Olga Sergeevna Milts, Yernat Rashidovich Nurtazin

{"title":"Polymer–Zeolite Composites: Synthesis, Characterization and Application","authors":"G. Mamytbekov, Dmitry Anatol’evich Zheltov, Olga Sergeevna Milts, Yernat Rashidovich Nurtazin","doi":"10.3390/colloids8010008","DOIUrl":"https://doi.org/10.3390/colloids8010008","url":null,"abstract":"Although the potential of natural minerals for purification of liquid radioactive wastes (LRW) from radionuclides has been widely studied, the use of hybrid polymer composites made of zeolite is still rather scarce. This article reports on the preparation of zeolite-based hybrid polymer composites using the in situ polymerization technique in the body of mineral matrix and its intercalated with copper ferrocyanide (CuFC) forms. This hybrid polymer composites have shown unique and enhanced properties for the removal of micropollutants from wasted water as compared to the individual mineral. The change in conventional properties of two mixed minerals, such as zeolite and bentonite, and their intercalated with CuFC forms were probed using techniques such as scanning electron microscopy (SEM), X-ray diffraction (XRD), Mössbauer spectroscopy (MS) and FT-IR analysis. The totality of analysis showed a coexistence of intercalated and percolated zeolite phases. The hybrid polymer composites exhibited both adsorption and ion-exchange properties in the removal of 134,137Cs+, 57,60Co2+ and 85Sr2+ radionuclides from LRW.","PeriodicalId":10433,"journal":{"name":"Colloids and Interfaces","volume":null,"pages":null},"PeriodicalIF":2.4,"publicationDate":"2024-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139442687","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The Onset and Early Stages of Dynamic Wetting of Superspreading and Non-Superspreading Trisiloxane Surfactant Solutions on Hydrophobic Surfaces 疏水性表面上超扩散和非超扩散三硅氧烷表面活性剂溶液动态润湿的开始和早期阶段

IF 2.4

Colloids and Interfaces Pub Date : 2024-01-02 DOI: 10.3390/colloids8010005

V. Bertola

{"title":"The Onset and Early Stages of Dynamic Wetting of Superspreading and Non-Superspreading Trisiloxane Surfactant Solutions on Hydrophobic Surfaces","authors":"V. Bertola","doi":"10.3390/colloids8010005","DOIUrl":"https://doi.org/10.3390/colloids8010005","url":null,"abstract":"The onset and early stages of dynamic wetting on different hydrophobic surfaces is investigated experimentally for aqueous solutions of two commercial trisiloxane surfacants of similar chemical structure, one of which exhibits superspreading behaviour, in order to investigate the spreading dynamics independently of the surface activity. Superspreading, or the ability of a surfactant solution to spread on a surface beyond the state determined by thermodynamic equilibrium, has been investigated for more than 30 years however its physical mechanism remains poorly understood to date despite its important applications in the formulation of agrochemicals. Surfactant solutions were prepared by dissolving S233 and S240 surfactants (Evonik Industries AG, Essen, Germany) into de-ionised water at a weight concentration of 0.1%. Drops of surfactant solutions and pure water were deposited on three horizontal substrates with different wettability (equilibrium contact angle of water ranging between 55∘ and 100∘), and observed from below with a high-frame rate camera to visualise the advancing contact line. The spreading ratio of drops as a function of time was extracted from high-speed videos by digital image processing. Results reveal that the superspreading solution exhibits an intermittent spreading rate, as well as peculiar features of the contact line, which are not observed for the non-superspreading solution, and confirm the superspreading effect becomes less significant when the surface energy of the substrate is decreased.","PeriodicalId":10433,"journal":{"name":"Colloids and Interfaces","volume":null,"pages":null},"PeriodicalIF":2.4,"publicationDate":"2024-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139452584","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Improving Foodborne Pathogen Control Using Green Nanosized Emulsions of Plectranthus hadiensis Phytochemicals 利用绿色纳米级海带植物化学乳剂改善食源性病原体控制

IF 2.4

Colloids and Interfaces Pub Date : 2023-12-22 DOI: 10.3390/colloids8010003

Lucía Carolina Vega-Hernández, J. C. Serrano-Niño, C. Velázquez-Carriles, Alma H. Martínez-Preciado, Adriana Cavazos-Garduño, J. Silva-Jara

{"title":"Improving Foodborne Pathogen Control Using Green Nanosized Emulsions of Plectranthus hadiensis Phytochemicals","authors":"Lucía Carolina Vega-Hernández, J. C. Serrano-Niño, C. Velázquez-Carriles, Alma H. Martínez-Preciado, Adriana Cavazos-Garduño, J. Silva-Jara","doi":"10.3390/colloids8010003","DOIUrl":"https://doi.org/10.3390/colloids8010003","url":null,"abstract":"Every year, millions of foodborne illnesses with thousands of deaths occur worldwide, which is why controlling foodborne pathogens is sought. In this study, nanoemulsions of phytochemicals extracted from Plectranthus hadiensis var. tomentosus (PHT) were obtained, and their antioxidant and antimicrobial capacities were evaluated. PHT extracts were obtained by maceration, ultrasound, and Naviglio methods, and their antimicrobial activity against Staphylococcus aureus, Listeria monocytogenes, Escherichia coli, and Salmonella enterica was determined by the microdilution method. The extract with the highest antimicrobial activity was obtained by Naviglio with a minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) of 12.5 and 25 mg/mL, respectively, for all bacterial strains. The nanoemulsion (o/w) made with Tween 40, 5% extract, and 50% ultrasonic amplitude had a globule size of 4.4 nm, a polydispersity index of 0.48, and a surface charge of −0.08 mV and remained stable for 30 days. This nanosystem presented significantly higher antimicrobial and antioxidant activity than the free extract. Thus, the nanoencapsulation of the phytochemicals in the PHT extracts is an alternative to protect and enhance their biological activity against pathogenic microorganisms.","PeriodicalId":10433,"journal":{"name":"Colloids and Interfaces","volume":null,"pages":null},"PeriodicalIF":2.4,"publicationDate":"2023-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138994157","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Measurement of Dilational Modulus of an Adsorbed BSA Film Using Pendant Bubble Tensiometry: From a Clean Interface to Saturation 利用悬挂式气泡张力仪测量吸附 BSA 薄膜的扩张模量：从清洁界面到饱和

IF 2.4

Colloids and Interfaces Pub Date : 2023-12-22 DOI: 10.3390/colloids8010004

Siam Hussain, Johann Eduardo Maradiaga Rivas, Wen-Chi Tseng, R. Tsay, Boris Noskov, Giuseppe Loglio, Shi-Yow Lin

{"title":"Measurement of Dilational Modulus of an Adsorbed BSA Film Using Pendant Bubble Tensiometry: From a Clean Interface to Saturation","authors":"Siam Hussain, Johann Eduardo Maradiaga Rivas, Wen-Chi Tseng, R. Tsay, Boris Noskov, Giuseppe Loglio, Shi-Yow Lin","doi":"10.3390/colloids8010004","DOIUrl":"https://doi.org/10.3390/colloids8010004","url":null,"abstract":"Two open issues on the measurement of the dilational modulus (E) for an adsorbed protein film during the adsorption process have been unacknowledged: how E varies during the adsorption and the length of time needed to attain a stable E value. A new approach for detecting the E variation from a clean air–water interface to saturated film and estimating the time needed to reach a saturated state was proposed. A pendant bubble tensiometer was utilized for measuring the relaxations of surface tension (ST) and surface area (SA), and the E was evaluated from the relaxation data of minute distinct perturbances. The data showed a clear variation in E during the BSA adsorption: E sharply decreased to a minimum at the early stage of BSA adsorption; then, it rose from this minimum and oscillated for a while before reaching an E corresponding to a saturated BSA film after a significant duration. The adsorbed BSA film took ~35 h to reach its saturated state, which was much longer than the reported lifetime of the adsorbed film in the literature. A rapid surface perturbation (forced bubble expansion/compression) could change the E, causing a significant drop in E followed by a slow increase to the original stable value.","PeriodicalId":10433,"journal":{"name":"Colloids and Interfaces","volume":null,"pages":null},"PeriodicalIF":2.4,"publicationDate":"2023-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139165549","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0