Colloids and Interface Science Communications This is an RSS file. You can use it to subscribe to this data in your favourite RSS reader or to display this data on your own website or blog.

Simulation study of the Gachsaran asphaltene behavior within the interface of oil/water emulsion: a case study
Publication date: November 2019Source: Colloid and Interface Science Communications, Volume 33Author(s): Amir Hossein Saeedi Dehaghani, Mohammad Soodbakhsh Taleghani, Mohammad Hasan Badizad, Reza DaneshfarAbstractMolecular dynamics (MD) simulation was utilized to study the role of asphaltene extracted from Gachsaran (an Iranian oilfield) at the synthetic oil-water interface. In agreement with experimental data, IFTs predicted by MD simulation for heptol/brine system showed a minima at around 50 vol.% n-heptane, reflecting the highest contribution of asphaltene into the interface. At greater n-heptane fractions, IFT was inc...
Source: Colloids and Interface Science Communications - October 17, 2019 Category: Nanotechnology Source Type: research

Effect of particle weight concentration on the lubrication properties of graphene based epoxy composites
Publication date: November 2019Source: Colloid and Interface Science Communications, Volume 33Author(s): Ram Krishna Upadhyay, Arvind KumarAbstractEpoxy-graphene composites are prepared with varying graphene concentration of 1 wt%, 3 wt%, and 5 wt%. Composite fabrication involves continuous stirring of the mixture consisting graphene and epoxy resin followed by curing first at room temperature and subsequently at 100 °C. In the epoxy-graphene composites, compressive stresses show increasing trend with filler concentration. A correlation between surface roughness and wetting is established to explain the Wenzel's c...
Source: Colloids and Interface Science Communications - October 15, 2019 Category: Nanotechnology Source Type: research

Ag2S decorated nanocubes with enhanced near-infrared photothermal and photodynamic properties for rapid sterilization
Publication date: November 2019Source: Colloid and Interface Science Communications, Volume 33Author(s): Ke Xiong, Jun Li, Lei Tan, Zhenduo Cui, Zhaoyang Li, Shuilin Wu, Yanqin Liang, Shengli Zhu, Xiangmei LiuAbstractInfectious diseases caused by bacteria is always a serious problem. In this work, Ag2S nanoparticles decorated nanocubes (Ag2S/NCs) were synthesized, in which NCs were obtained by pyrolyzing the metal-organic frameworks (MOFs) at 800 °C while Ag2S were prepared by a simple ultrasonic process and solvent reaction. The former carbon nanocubes exhibited an excellent photothermal conversion efficiency of 29%, a...
Source: Colloids and Interface Science Communications - October 12, 2019 Category: Nanotechnology Source Type: research

Modeling of kinetic adsorption of natural surfactants on sandstone minerals: Spotlight on accurate prediction and data evaluation
Publication date: November 2019Source: Colloid and Interface Science Communications, Volume 33Author(s): Shayan Faghihi, Amin Keykhosravi, Khalil ShahbaziAbstractSurfactant injection is a tertiary enhanced oil recovery (EOR) method which aims to improve trapped oil production by wettability alteration of rock surface and also interfacial tension reduction. Surfactants adsorption is an important parameter which needs to be considered before their application in EOR methods. In this paper, least square support vector machine was used as a robust approach for accurate prediction and modeling surfactants adsorption on sandston...
Source: Colloids and Interface Science Communications - October 12, 2019 Category: Nanotechnology Source Type: research

Synthesis, physicochemical characteristics and antimicrobial studies of ethyl-substituted imidazolium-based surface active ionic liquids (SAILs)
Publication date: November 2019Source: Colloid and Interface Science Communications, Volume 33Author(s): Arifa Shaheen, Rabia Arif, Ab Waheed Mir, Sumbul RehmanAbstractA series containing higher members of ethyl-substituted imidazolium-based surface active ionic liquids (SAILs) [Cneim]Br, (n = 12, 14, 16) has been synthesized by a two-step reaction pathway. They were characterized by FT-IR, 1H NMR and 13C NMR and their effect on self-aggregation behavior in aqueous solution has been examined, employing conductometric and tensiometric methods besides fluorescence measurements and UV-visible spectroscopy. The conductivit...
Source: Colloids and Interface Science Communications - September 18, 2019 Category: Nanotechnology Source Type: research

Antibody conjugated green synthesized chitosan-gold nanoparticles for optical biosensing
In this study a novel antibody conjugated chitosan-gold nanoparticles (Ab-CS-GNPs) was engineered by the green synthesized method for detection of the target antigen (Ag) by three different types of optical biosensing system (colorimetric, localized surface plasmon resonance (LSPR) and paper-based dot-blot). Colloidal GNPs was synthesized by chitosan as reducer and stabilizer agent. For paper-based dot-blot detection, antibodies were conjugated to CS-GNPs surface and applied as nanobioprobe to the detection of spotted Ag on nitrocellulose (NC) membrane by the naked eye. Dot-blot assay results showed that the limit of detec...
Source: Colloids and Interface Science Communications - September 15, 2019 Category: Nanotechnology Source Type: research

Evaluating the internal structure of monodispersed mesoporous silica spheres by small-angle X-ray scattering
Publication date: November 2019Source: Colloid and Interface Science Communications, Volume 33Author(s): Masashi Harada, Tadashi Nakamura, Kazuhisa YanoAbstractAlthough the spherical morphology and mesoporous structure of monodispersed mesoporous silica spheres (MMSS) have been extensively investigated by scanning electron microscopy and transmission electron microscopy, the statistical distribution of mesopores from the surface to the center of a particle, average density of the spheres, and volume fraction of silica have not been investigated. Herein, small-angle X-ray scattering (SAXS) was performed on aqueous dispersio...
Source: Colloids and Interface Science Communications - September 14, 2019 Category: Nanotechnology Source Type: research

Collection of nanoparticles at the air-liquid interface by surface tension gradients
Publication date: November 2019Source: Colloid and Interface Science Communications, Volume 33Author(s): Dong Liu, Ding Weng, Jiadao WangAbstractParticles such as nano-plastics at the air-liquid interface is harmful to the environment. Due to small size of the nanoparticles, expensive materials are needed to collect them such as ultrafiltration membranes. In our study, we propose an easy method to collect the nanoparticles at the air-liquid interface. Because surface tension of contaminated water is lower than that of deionized water, the surface tension gradient is used to transport the nanoparticles. In our study, we wet...
Source: Colloids and Interface Science Communications - September 13, 2019 Category: Nanotechnology Source Type: research

Synthesis and characterization of chemically-reactive solubilization surfactants for membrane proteins and preparation of membrane protein hydrogel microfibers
Publication date: September 2019Source: Colloid and Interface Science Communications, Volume 32Author(s): Aki Taniguchi, Shuhei Koeda, Tomoyasu Noji, Keisuke Kawakami, Natsumi Sumito, Takehisa Dewa, Shigeru Itoh, Nobuo Kamiya, Toshihisa MizunoAbstractWe herein report the synthesis and characterization of unique chemically reactive solubilization surfactants, Alk-DKDKC12K and Bis-alk-DKDKC12K that consist of the DKDKC12K unit, previously reported to function as a novel class of lipopeptide-based solubilization surfactant for membrane proteins such as photosystem I (PSI) derived from cyanobacteria, and one or two alkyne grou...
Source: Colloids and Interface Science Communications - September 12, 2019 Category: Nanotechnology Source Type: research

Aggregation behavior of short-chained archaeal phospholipid analogs: Contribution of methyl branches to lipid hydrophobicity and membrane formability
Publication date: September 2019Source: Colloid and Interface Science Communications, Volume 32Author(s): Hiroshi Komatsu, Kiyotaka Sakai, Teruhiko Baba, Toshiyuki Takagi, Toshiyuki KanamoriAbstractThe aggregation behavior of short-chained archaeal phospholipid analogs (DCn+mPCs, (n, m) = (4, 1) and (8, 2), n: number of carbon atoms in the single main chain; m: number of methyl branches in one chain. PC denotes phosphatidylcholine) in water was investigated as a function of the hydrophobic chain length and the glycerol-linkage type (ester or ether bond), using fluorescent probe method, polarized light microscopy and XR...
Source: Colloids and Interface Science Communications - September 10, 2019 Category: Nanotechnology Source Type: research

Combined effects of Marangoni, sedimentation and coffee-ring flows on evaporative deposits of superparamagnetic colloids
Publication date: September 2019Source: Colloid and Interface Science Communications, Volume 32Author(s): Alexis Darras, Nicolas Vandewalle, Geoffroy LumayAbstractEvaporation of sessile colloidal droplets is a way to organize suspended particles. It is already known that the composition of the surrounding fluid modifies the dried deposit. For superparamagnetic particles, recent studies showed that external magnetic fields can act as remote controls for those deposits. In this paper, we study the configuration space given by the interplay of such fields and a modification of the fluid composition by considering various conc...
Source: Colloids and Interface Science Communications - August 24, 2019 Category: Nanotechnology Source Type: research

Atomic-like motion of coverslips at the air-water interface
Publication date: September 2019Source: Colloid and Interface Science Communications, Volume 32Author(s): Dong Liu, Awais Mahmood, Ding Weng, Jiadao WangAbstractAtomic-like motion of coverslips (their surfaces drip with 70 vol% aqueous ethanol) is that the coverslips attract each other over a long distance, but repel when they are almost in contact. When they are placed at a considerable distance, the two coverslips get attracted towards each other. However, when the separating distance between them is reduced to a near contact point, they start to repel. According to our research, there are mainly two opposite forces ac...
Source: Colloids and Interface Science Communications - August 24, 2019 Category: Nanotechnology Source Type: research

Bile acids adsorption by chitoan-fumed silica enterosorbent
Publication date: September 2019Source: Colloid and Interface Science Communications, Volume 32Author(s): Tetyana M. Budnyak, Nataliya N. Vlasova, Lyudmila P. Golovkova, Adam Slabon, Valentin A. TertykhAbstractHybrid composites from chitosan and fumed silica were synthesized and applied for the adsorption of bile acids (BA), e.g. cholic (CA) and taurocholic (TCA) acids. The chitosan immobilization was confirmed by infrared spectroscopy and the corresponding stability of the composites was confirmed by tests with the analytical reagent ninhydrin. The effects of adsorption parameters such as initial concentration of BA and p...
Source: Colloids and Interface Science Communications - August 9, 2019 Category: Nanotechnology Source Type: research

Courier properties of modified citrus pectinate-chitosan nanoparticles in colon delivery of curcumin
Publication date: September 2019Source: Colloid and Interface Science Communications, Volume 32Author(s): Rayan Sabra, Clive J. Roberts, Nashiru BillaAbstractWe aimed to probe the carrier properties of a colon-targeted curcumin-containing modified pectinate-chitosan nanoparticulate carrier system (MCPCNPs), in simulated colonic condition. The MCPCNPs were prepared via ionic gelation. There was a reduction in zeta potential (ZP) of the MCPCNPs at pH 1.2 and a more significant reduction at pH 7.0, both mucin concentration-dependent. A reduction in ZP correlates mucoadhesive propensity. Nanoparticle tracking analyses (NTA...
Source: Colloids and Interface Science Communications - August 6, 2019 Category: Nanotechnology Source Type: research

Synthesis of dimpled and submicron-sized polymer particles of different morphologies using free micromixer
In this report, we propose a new method for synthesizing dimpled and submicron-sized polystyrene (PS) particles using a novel microfluidic device called the free micromixer (FMM). We could successfully synthesize dimpled and submicron-sized particles of various morphologies by controlling the concentration of PS and the temperature of the poor solvent used before mixing within the FMM. Formation of the particles can be attributed to the electrical charge of the polymer used for forming the particles.Graphical abstract (Source: Colloids and Interface Science Communications)
Source: Colloids and Interface Science Communications - July 27, 2019 Category: Nanotechnology Source Type: research