Exploring the Potential of a New 1,2,4-Triazole Derivative for Corrosion Protection of Carbon Steel in HCl: A Computational and Experimental Evaluation
Publication date: Available online 15 February 2020Source: Colloids and Surfaces A: Physicochemical and Engineering AspectsAuthor(s): Manal Naciri, Yasmina El Aoufir, Hassane Lgaz, Fatima Lazrak, Ahmed Ghanimi, Abdallah Guenbour, ismat H. Ali, Mouloud El Moudane, Jamal Taoufik, Ill-Min ChungAbstractCarbon steel is a commonly used alloy in petroleum refining equipment. Nonetheless, its weak corrosion resistance is a perpetual problem for these industries. In the present study, we manifest the usefulness of a novel 1,2,4-triazole derivative, namely 5-hexylsulfanyl-1,2,4-triazole (HST) in inhibiting the carbon steel (CS) corr...
Source: Colloids and Surfaces A: Physicochemical and Engineering Aspects - February 17, 2020 Category: Chemistry Source Type: research

Corrigendum to “Coordination adsorption of Ag(I) on cobalt-ferrous oxalates and their derived Ag/CoFe2O4 for catalytic hydrogenation reactions” [Colloids Surf. A: Physicochem. Eng. Aspects 583 (2019) 124007]
Publication date: Available online 14 February 2020Source: Colloids and Surfaces A: Physicochemical and Engineering AspectsAuthor(s): Shixue He, Chao Yang, Mingguang Niu, Dandi Wei, Shasha Chu, Mei Zhong, Jide Wang, Su Xintai, Lu Wang (Source: Colloids and Surfaces A: Physicochemical and Engineering Aspects)
Source: Colloids and Surfaces A: Physicochemical and Engineering Aspects - February 15, 2020 Category: Chemistry Source Type: research

Interfacial rheological behavior of N-acyl amino acid surfactants derived from vegetable oils
Publication date: Available online 14 February 2020Source: Colloids and Surfaces A: Physicochemical and Engineering AspectsAuthor(s): Zhenghong Chen, Pingping Zhang, Yang Liu, Mekkaoui Aicha, Ce Wang, Li Zhao, Baocai XuAbstractSurfactants based on natural building blocks instead of traditional petroleum chemicals have attracted increasing attention in recent years. N-acyl amino acid surfactants derived from vegetable oils and amino acids are popular because of their excellent interfacial properties, biodegradability and low toxicity. Due to the variety of vegetable oils, it is significant to understand the effect of the co...
Source: Colloids and Surfaces A: Physicochemical and Engineering Aspects - February 15, 2020 Category: Chemistry Source Type: research

Curcumin Degradation Kinetics in Micellar Solutions: Enhanced Stability in the Presence of Cationic Surfactants
Publication date: Available online 14 February 2020Source: Colloids and Surfaces A: Physicochemical and Engineering AspectsAuthor(s): Bassem Aboudiab, Ali R. Tehrani-Bagha, Digambara PatraAbstractIn this work, the rate of curcumin degradation in the presence of various surfactants (anionic, cationic, and nonionic) and salts (i.e., NaCl, NaHCO3, Na2CO3, and NaOH) was investigated by photodiode-array UV-Vis spectroscopy. The curcumin degradation at neutral pH or in the presence of NaCl during the first 16 h of the study was negligible (i.e., zero rate constant). Depending on the type and concentration of added alkalin...
Source: Colloids and Surfaces A: Physicochemical and Engineering Aspects - February 15, 2020 Category: Chemistry Source Type: research

Effects of cations on the size and silica shell microstructure of hollow silica nanoparticles prepared using PAA/cation/NH4OH template
Publication date: Available online 14 February 2020Source: Colloids and Surfaces A: Physicochemical and Engineering AspectsAuthor(s): Yuki Nakashima, Chika Takai, Hadi Razavi-Khosroshahi, Masayoshi FujiAbstractThis paper describes the effect of cations on the size and silica shell microstructure of hollow silica nanoparticles (HSNPs) using polyacrylic acid/cation/ammonium templates in ethanol. The influence of the cations was investigated using four kinds of cations such as sodium, potassium, magnesium, and calcium. The smaller hydrated radius cation could prepare the smaller HSNPs, because the smaller hydrated radius cati...
Source: Colloids and Surfaces A: Physicochemical and Engineering Aspects - February 15, 2020 Category: Chemistry Source Type: research

Fine tuning of surface properties of SiO2 nanoparticles for the regulation of Pickering emulsions
Publication date: Available online 14 February 2020Source: Colloids and Surfaces A: Physicochemical and Engineering AspectsAuthor(s): Yan Meng, Wenxing Sun, Hao Yang, Wei Wang, Nan Jin, Yuchao Zhao, Xunli Zhang, Hongying LüAbstractPickering emulsions hold great potential in solving the mass transfer limitation in gas-liquid-solid and/or liquid-liquid-solid multiphase systems. In the present study, the surface properties of SiO2 nanoparticles were finely tuned by a novel large-scale production method, which determined the final geometry of the dispersed droplets and their stability. By controlling the amount of KH-570&...
Source: Colloids and Surfaces A: Physicochemical and Engineering Aspects - February 15, 2020 Category: Chemistry Source Type: research

Making Polymers Colored and Stiffer by Dyed Regenerated Cellulose Employing Pickering Emulsions
We describe how uniformly colored PMMA-cellulose composites with high transparency in the visible range can be obtained. We provide detailed characterization of the resulting composites. Thermogravimetric analysis shows an increase of onset of degradation temperature, thus indicates improved thermal stability. Also the mechanical properties become improved, as indicated by flexural strength enhancement. The Pickering emulsion-based procedure is simple and cost effective, and could be easily adopted to prepare other polymer-nanocomposite systems.Graphical abstractThis work presents the preparation of well-defined composites...
Source: Colloids and Surfaces A: Physicochemical and Engineering Aspects - February 15, 2020 Category: Chemistry Source Type: research

A new in situ enhancement of the hydroxyapatite surface by Tyramine: Preparation and interfacial properties
This study presents the modification of the hydroxyapatite surface by Tyramine prepared by hydrothermal reaction. The nanoparticles of Tyramine grafted hydroxyapatite were characterized by x-ray diffraction, infrared spectroscopy, solid-state NMR spectroscopy, thermal analysis, TEM microscopy, and measurements of the specific surface area (SBET). In situ grafting of Tyramine onto the HAp surface reduces crystal growth through the formation of organic-inorganic hybrid nanoparticles, thereby developing a multifunctional surface, thus providing a good compatibility with surface interaction for cell-modified HAp. To better ill...
Source: Colloids and Surfaces A: Physicochemical and Engineering Aspects - February 14, 2020 Category: Chemistry Source Type: research

Microwave hydrothermal synthesized ZnIn-layered double hydroxides derived ZnIn-layered double oxides for enhanced methylene blue photodegradation
Publication date: Available online 13 February 2020Source: Colloids and Surfaces A: Physicochemical and Engineering AspectsAuthor(s): Xiaoxiao Liu, Qian Shao, Yufei Zhang, Xiaojing Wang, Jing Lin, Yuanfa Gan, Mengyao Dong, Zhanhu GuoAbstractThe ZnIn-layered double hydroxides (ZnIn-LDHs) were synthesized by microwave hydrothermal method and used as the precursor to prepare the ZnIn-layered double oxides (ZnIn-LDOs) by the controllable calcination. The ZnIn-LDOs were aggregated by porous sheet materials, and the particle size was about 50 nm. The photocatalytic studies showed that the optimum molar ratio of Zn2+/ In3+...
Source: Colloids and Surfaces A: Physicochemical and Engineering Aspects - February 14, 2020 Category: Chemistry Source Type: research

Surface Force Arising from Adsorbed Graphene Oxide in Kaolinite Suspensions
Publication date: Available online 13 February 2020Source: Colloids and Surfaces A: Physicochemical and Engineering AspectsAuthor(s): Ying Qing Hoor, Pek-Ing Au, N.M. Mubarak, Mohammad Khalid, Priyanka Jagadish, Rashmi Walvekar, E.C. AbdullahAbstractThe mechanism of surface force, rheological and surface charge behaviours of kaolinite and graphene oxide (GO)-kaolinite suspension under various surface chemistry condition using kaolin mined in Malaysia are not clearly defined. Therefore, these properties were determined using zeta potential-pH measurements, Mular-Roberts (MR) pH-salt addition and yield stress-pH measurements...
Source: Colloids and Surfaces A: Physicochemical and Engineering Aspects - February 14, 2020 Category: Chemistry Source Type: research

Manipulation of Taylor Bubble Flow in a Magneto-Fluidic System
Publication date: Available online 14 February 2020Source: Colloids and Surfaces A: Physicochemical and Engineering AspectsAuthor(s): Ram Krishna Shah, Sameer KhandekarAbstractTransport characteristics of gas bubbles, suspended in magnetically activated ferrofluids, such as their shape and size, formation frequency and superficial velocities, can be effectively manipulated by strategically imposing an external magnetic field in the flow domain. We demonstrate and analyse such a flow manipulation technique on an air-ferrofluid Taylor slug-bubble flow, formed in a T-junction mini-channel fluidic device having a square cross-...
Source: Colloids and Surfaces A: Physicochemical and Engineering Aspects - February 14, 2020 Category: Chemistry Source Type: research

Self-repairing flexible strain sensors based on nanocomposite hydrogels for whole-body monitoring
Publication date: Available online 12 February 2020Source: Colloids and Surfaces A: Physicochemical and Engineering AspectsAuthor(s): Hongwei Zhou, Zhaoyang Jin, Ying Yuan, Gai Zhang, Weifeng Zhao, Xilang Jin, Aijie Ma, Hanbin Liu, Weixing ChenAbstractFlexible strain sensors based on extensible hydrogels are extensively investigated for human motion monitoring, but the performances of such strain sensors are limited by failure or high residual strain of hydrogels. Herein, self-repairing flexible strain sensors are fabricated with poly(AA-co-SMA)/c-CNF/Fe3+ nanocomposite hydrogels (AA: acrylic acid, SMA: stearyl methacrylat...
Source: Colloids and Surfaces A: Physicochemical and Engineering Aspects - February 14, 2020 Category: Chemistry Source Type: research

Synthesis, structural, optical and magnetic properties of NiFe2O4/MWCNTs/ZnO hybrid nanocomposite for solar radiation driven photocatalytic degradation and magnetic separation
Publication date: Available online 12 February 2020Source: Colloids and Surfaces A: Physicochemical and Engineering AspectsAuthor(s): F.A. Hezam, O. Nur, M.A. MustafaAbstractNovel multifunctional NiFe2O4/MWCNTs/ZnO hybrid nanocomposite has been successfully synthesized via the hydrothermal and the co-precipitation methods at 210 °C and 90 °C, respectively, to be used as a solar radiation driven photocatalytic material. The hybrid nanocomposite exhibits enhanced photocatalytic activity compared to NiFe2O4 and ZnO for decolorization of Methylene Blue (MB) dye -as a model pollutant - from aqueous solutio...
Source: Colloids and Surfaces A: Physicochemical and Engineering Aspects - February 14, 2020 Category: Chemistry Source Type: research

Dispersion Stability and Surface Tension of SDS-Stabilized Saline Nanofluids with Graphene Nanoplatelets
This study focuses on the benchmark experimental investigation of the surface tension behavior in graphene nanoplatelets-based saline nanofluids in ambient air using the pendant drop method. Graphene nanoplatelets are dispersed in saline fluid (30PPT) using optimum anionic SDS stabilizer and ultrasonication, exhibiting excellent stability for minimum 72 hr. Different characterizations are performed for nanoplatelets and nanofluid stability such as electron microscopy, FTIR, XRD, DLS and sedimentation analysis. Surface tension measurements are taken at varying concentrations of graphene nanoplatelets range of 0-0.25&...
Source: Colloids and Surfaces A: Physicochemical and Engineering Aspects - February 14, 2020 Category: Chemistry Source Type: research

Graphene Oxide-based Nanocomposite Enabled Highly Efficient Targeted Synergistic Therapy for Colorectal Cancer
Publication date: Available online 12 February 2020Source: Colloids and Surfaces A: Physicochemical and Engineering AspectsAuthor(s): Zhichao Qiu, Jing Hu, Ziwei Li, Xiaoxue Yang, Jun Hu, Qingjun You, Shuo Bai, Yong Mao, Dong Hua, Jian YinAbstractIntegrating different therapies into a single nanoplatform has shown great potential for synergistic anti-tumor therapy. In this work, we fabricated the graphene oxide (GO)-based nanosheets loaded with chemotherapeutic drug 5-fluorouracil (5-FU) and modified with GE11, which is an efficient ligand for epidermal growth factor receptor (EGFR). The nanocomposite system 5-FU/GO-PEG-GE...
Source: Colloids and Surfaces A: Physicochemical and Engineering Aspects - February 14, 2020 Category: Chemistry Source Type: research

Luminescence Properties and ROS Generation of Magnetic Porous Silicon Nanoparticles
Publication date: Available online 13 February 2020Source: Colloids and Surfaces A: Physicochemical and Engineering AspectsAuthor(s): Paula Caregnato, Pedro M. David Gara, Eduardo D. Prieto, Mónica C. GonzalezAbstractMagnetite‒Porous Silicon 100-150 nm size nanoparticles (MPSi) were obtained combining luminescent and magnetic properties from silicon and magnetite, respectively.MPSi hybrids were characterized by high-resolution transmission electron microscopy, atomic and magnetic force microscopy and X-ray photoelectron spectroscopy.The presence of magnetite quenches statically visible luminescence of Porou...
Source: Colloids and Surfaces A: Physicochemical and Engineering Aspects - February 14, 2020 Category: Chemistry Source Type: research

Electric field control of propulsion force of a boat driven by chemical Marangoni effect
Publication date: Available online 13 February 2020Source: Colloids and Surfaces A: Physicochemical and Engineering AspectsAuthor(s): Shigeki Tsuchitani, Takumi Ikebe, Hirofumi Miki, Kunitomo KikuchiAbstractChemical Marangoni propulsion (CMP) is a driving on fluid by surface tension imbalance around object caused by anisotropic distribution of surfactant or by the reaction of Marangoni convection caused by the surface tension gradient. The purpose of the study is a remote control of the propulsion force in CMP. Electrostatic interaction of ionic surfactants as propellant with external electric field (EF) is expected to mod...
Source: Colloids and Surfaces A: Physicochemical and Engineering Aspects - February 14, 2020 Category: Chemistry Source Type: research

Application of polymeric modified polyaniline-silica particles for improved corrosion resistance of hybrid zinc coatings
Publication date: Available online 13 February 2020Source: Colloids and Surfaces A: Physicochemical and Engineering AspectsAuthor(s): K. Kamburova, N. Boshkova, N. Tabakova, N. Boshkov, Ts. RadevaAbstractPolyaniline (PANI) is a conducting polymer that can be used for active corrosion protection of metals and metallic structures. In the present work, we describe the preparation of stable aqueous suspension of positively charged colloidal PANI-SiO2 particles suitable for electrodeposition with zinc on cathode (steel) surface. Stabilization of the suspension against aggregation is realized by adsorption of commercially availa...
Source: Colloids and Surfaces A: Physicochemical and Engineering Aspects - February 14, 2020 Category: Chemistry Source Type: research

Adsorption of Aqueous Copper Chlorophyllin Mixtures on Model Surfaces
Publication date: Available online 13 February 2020Source: Colloids and Surfaces A: Physicochemical and Engineering AspectsAuthor(s): Fengyan Wang, Yuichi Terazono, Jun Liu, Michael Fefer, Robert H. PeltonAbstractMeasured were the colloidal and adsorption properties of copper chlorophyllin (CuChl), a complex mixture derived from chlorophyll that is used as a food additive and in other applications. CuChl has an “apparent solubility” (it is a mixture) of 0.1 g/L in PBS buffer. Dynamic light scattering of dilute solutions showed the presence of particles with diameters in the range 10-200 nm. Nanopa...
Source: Colloids and Surfaces A: Physicochemical and Engineering Aspects - February 14, 2020 Category: Chemistry Source Type: research

Preparation of hollow nanoparticles with controllable diameter by one-step controlled etching of microporous silica particles using an ammonia-based etchant
In this study, the condensation degree of silica particles, PDDA concentration, ammonia etchant concentration, and etching temperature were found to have significant impact on the morphology of hollow silica nanoparticles. Adsorption studies showed that the hollow silica particles could be efficiently used for the immobilization of bovine serum albumin.Graphical abstract (Source: Colloids and Surfaces A: Physicochemical and Engineering Aspects)
Source: Colloids and Surfaces A: Physicochemical and Engineering Aspects - February 13, 2020 Category: Chemistry Source Type: research

Highly active novel CeTi2O6/g-C3N5 photocatalyst with extended spectral response towards removal of endocrine disruptor 2, 4-dichlorophenol in aqueous medium
This study will offer new insight into the development of novel low bandgap g-C3N5 based stable photocatalyst materials with tunable bandgap for the degradation of hazardous pollutants.Graphical abstract (Source: Colloids and Surfaces A: Physicochemical and Engineering Aspects)
Source: Colloids and Surfaces A: Physicochemical and Engineering Aspects - February 13, 2020 Category: Chemistry Source Type: research

Mechanism of the temperature-responsive material regulating porous morphology on epoxy phenolic novolac resin microcapsule surface
In this study, epoxy phenolic novolac resin MCs were prepared with temperature-responsive 2,4,6-tris(dimethylaminomethyl)phenol (DMP) as crosslinker. Reaction temperature was proved to generate distinct effects on MC porous morphology, shell thickness, mechanical strength and release behavior. The MC surface varied from nonporous to dense small pores (ca. 237 nm in diameter) with increasing temperature from 40 °C to 70 °C, but they showed decreasing tendency at higher temperature (>70 °C). The encapsulation process illuminated that DMP aggregates formed and deposited on the loose s...
Source: Colloids and Surfaces A: Physicochemical and Engineering Aspects - February 13, 2020 Category: Chemistry Source Type: research

Low-salt dyeing of cotton fabric grafted with pH-responsive cationic polymer of Polyelectrolyte 2-(N,N-dimethylamino)ethyl methacrylate
Publication date: Available online 10 February 2020Source: Colloids and Surfaces A: Physicochemical and Engineering AspectsAuthor(s): Weiwei Dong, Man Zhou, Yue Li, Shixiong Zhai, Kaili Jin, Zhuizhui Fan, Hong Zhao, Weirong Zou, Zaisheng CaiAbstractIn this work, a pH-responsive polyelectrolyte 2-(N, N-dimethylamino) ethyl methacrylate (PDMAEMA) was grafted onto the cotton fabric by surface-initiated atom transfer radical polymerization by activator regenerated electron transfer (SI-ARGET ATRP). Then, the grafted cotton fabric was dyed by reactive dyes. SEM, XRD, FT-IR, TGA and whiteness test were investigated to characteri...
Source: Colloids and Surfaces A: Physicochemical and Engineering Aspects - February 11, 2020 Category: Chemistry Source Type: research

Tuning the PS-b-PAA aggregate morphologies by amines and dyes via liquid/liquid interfacial mass transfer-assisted self-assembly
Publication date: Available online 10 February 2020Source: Colloids and Surfaces A: Physicochemical and Engineering AspectsAuthor(s): Shuman Li, Ming Han, Hong-Guo LiuAbstractAmphiphilic block copolymers can self-assemble into various aggregates in which functional inorganic nanoparticles and organic chromophores can be incorporated. A variety of fabrication methods have been developed. In this work, the liquid/liquid interface mass transfer-assisted self-assembly method was extended to fabricate composite organized structure of polystyrene-b-polyacrylic acid (PS-b-PAA) with small organic molecules, such as diamines, dopam...
Source: Colloids and Surfaces A: Physicochemical and Engineering Aspects - February 11, 2020 Category: Chemistry Source Type: research

Film Formation Process of Natural Rubber Latex Particles: Roles of the Particle Size and Distribution of Non-Rubber Species on Film Microstructure
Publication date: Available online 10 February 2020Source: Colloids and Surfaces A: Physicochemical and Engineering AspectsAuthor(s): Manus Sriring, Adun Nimpaiboon, Sirirat Kumarn, Keiko Higaki, Yuji Higaki, Ken Kojio, Atsushi Takahara, Chee Cheong Ho, Jitladda SakdapipanichAbstractNatural rubber (NR) films from various mixing ratios of large- (LRP) and small rubber particles (SRP) were prepared through latex and solution casting methods. Film-forming behaviours of the resulting films were investigated by monitoring their surface characteristics using atomic force microscopy (AFM). When the SRP portion was higher, the sur...
Source: Colloids and Surfaces A: Physicochemical and Engineering Aspects - February 11, 2020 Category: Chemistry Source Type: research

ffigInvestigation of Mechanisms for Simultaneous Adsorption of Iron and Sulfate Ions onto Chitosan with Formation of Orthorhombic Structures
Publication date: Available online 10 February 2020Source: Colloids and Surfaces A: Physicochemical and Engineering AspectsAuthor(s): Janek Weißpflog, Regine Boldt, Benjamin Kohn, Ulrich Scheler, Dieter Jehnichen, Václav Tyrpekl, Simona SchwarzAbstractThe study confirms the interaction of sulfate ions (SO42-) into the polymer chains of chitosan under acidic conditions. As a result the crystallinity of chitosan decreases with (1) increasing protonation of the amino groups and (2) increasing SO42- concentration. The adsorption of iron ions (Fe2+/3+) resulting from (FeSO4)aq onto the chitosan surface takes place ...
Source: Colloids and Surfaces A: Physicochemical and Engineering Aspects - February 11, 2020 Category: Chemistry Source Type: research

Modification of Glycerol Force Field for Simulating Silver Nucleation under a Diffusion Limited Condition
Publication date: Available online 10 February 2020Source: Colloids and Surfaces A: Physicochemical and Engineering AspectsAuthor(s): Xiangyu Dou, Yongxiu Chen, Yongsheng HanAbstractMolecular dynamics simulation is a powerful tool in discovering nucleation phenomena. In a simulation of silver nucleation under a diffusion limited condition, the OPLS-AA force field is used to describe the glycerol solution. But the simulation crashes after running 260 ps. The energy and trajectories analyses indicate that the contact of the H and O atoms of the neighbor hydroxyls in the glycerol molecules leads to a sharp increase of ...
Source: Colloids and Surfaces A: Physicochemical and Engineering Aspects - February 11, 2020 Category: Chemistry Source Type: research

Oscillations of free surface at the edge of short capillary tubes
Publication date: Available online 10 February 2020Source: Colloids and Surfaces A: Physicochemical and Engineering AspectsAuthor(s): Junfeng Xiao, Xiang Liu, Youming Luo, Jianchao Cai, Jianfeng XuAbstractLiquid gets imbibed into the capillary tube under the influence of capillary pressure. If capillary tube is shorter than Jurin height, oscillations of free surface are observed when contact line is confined by the edge of tube. Through numerical simulations and theoretic analyses, the velocity at the tube edge is determined, and the morphologies of meniscus at different stages of oscillation are identified. Finally, the o...
Source: Colloids and Surfaces A: Physicochemical and Engineering Aspects - February 11, 2020 Category: Chemistry Source Type: research

Electrochemical Restructuring of Gold Electrodes with Redox Active Species to Create Electrocatalytically Active Nanostructured Surfaces
Publication date: Available online 10 February 2020Source: Colloids and Surfaces A: Physicochemical and Engineering AspectsAuthor(s): Panjaphong Lertsathitphong, Anthony P. O’Mullane, Benchaporn LertanantawongAbstractElectrochemical potential cycling of gold electrodes in commonly used redox active species to produce a nanostructured surface is introduced. A commercially available gold electrode when cycled in three redox active species including hexaammine ruthenium chloride, ferrocene methanol and ferricyanide shows rapid conversion of the surface into a nanostructured form within 50 cycles which usually requires h...
Source: Colloids and Surfaces A: Physicochemical and Engineering Aspects - February 11, 2020 Category: Chemistry Source Type: research

Particle-induced nanobubble generation for material-selective nanoparticle flotation
Publication date: Available online 10 February 2020Source: Colloids and Surfaces A: Physicochemical and Engineering AspectsAuthor(s): Vinzent Olszok, Juliana Rivas-Botero, Annett Wollmann, Bernd Benker, Alfred P. WeberAbstractThe presented work investigates particle-induced nanobubble generation in order to extend the applicability of material-selective pressure flotation towards nanoscale materials. During a gas treatment procedure, filtered compressed air in the range of 0 bar to 2 bar overpressure was introduced into colloidal suspensions in ultra-purified water until saturation was obtained. Nanobubble fo...
Source: Colloids and Surfaces A: Physicochemical and Engineering Aspects - February 11, 2020 Category: Chemistry Source Type: research

Formulation of concentrated oil-in-water-in-oil double emulsions for fragrance encapsulation
We report the formulation of a concentrated double oil-in-water-in-oil (O/W/O) emulsion for fragrance encapsulation. As their water-in-oil-in-water homologous, these O/W/O emulsions, seldom described in literature, also require the use of two antagonist surfactants: a hydrophilic one (HS) to stabilize the fragrance-in-water droplets and a lipophilic one (LS) to stabilize the aqueous globules dispersed in oil, containing themselves the direct emulsion. An important issue in cosmetics is the necessity to adapt the formulation to each fragrance, so that a major progress would be the successful elaboration of an O/W/O emulsion...
Source: Colloids and Surfaces A: Physicochemical and Engineering Aspects - February 11, 2020 Category: Chemistry Source Type: research

Controllable accumulation of conjugated polymer nanoparticles on the surface of adhesive bacteria
Publication date: Available online 9 February 2020Source: Colloids and Surfaces A: Physicochemical and Engineering AspectsAuthor(s): Lu Liu, Xiaoyu Wang, Dongdong Ban, Shuxian Zhu, Lidong LiAbstractBacterial adhesions have caused serious infections and gradually evolved into a health threat, especially with the development of drug resistance in recent years. In this work, we report about controlling accumulation of conjugated polymer nanoparticles (CPNs) on the surface of adhesive bacteria, achieving anti-adhesion and sterilization simultaneously. Firstly, we prepared PFPPBA CPNs that had phenylboronic acid (PBA) and quate...
Source: Colloids and Surfaces A: Physicochemical and Engineering Aspects - February 10, 2020 Category: Chemistry Source Type: research

The effect of functional graphene oxide nanoparticles on corrosion resistance of waterborne polyurethane
Publication date: Available online 9 February 2020Source: Colloids and Surfaces A: Physicochemical and Engineering AspectsAuthor(s): Fengyuan Zhang, Weiqu Liu, Liyan Liang, Shuo Wang, Hongyi Shi, Yankun Xie, Maiping Yang, Ke PiAbstractFor waterborne coating, there is still inevitable defects (insufficient anti-corrosion performance). In this paper, the functional graphene oxide (TDPG) is prepared via self-prepared polymer ( triethylene tetramine-polyethylene glycol diglycidyl ether). The TDPG is used to modify waterborne polyurethane (WPU) coating for improving anti-corrosion property. The electrochemical impedance spectro...
Source: Colloids and Surfaces A: Physicochemical and Engineering Aspects - February 10, 2020 Category: Chemistry Source Type: research

Strong adhesion of polyvinylpyrrolidone-coated copper nanoparticles on various substrates fabricated from well-dispersed copper nanoparticle inks
In this study, we obtained copper nanoparticle (Cu NP) films exhibiting low resistivity and strong adhesion with respect to various substrates by drop-casting the Cu NP ink with polyvinylpyrrolidone (PVP) after being sintered at 250 °C. PVP functioned as a dispersant in the ink and as an adhesive at the interfaces between the Cu NPs and the substrates. Aggregation of the Cu NPs in the ink resulted in the creation of a porous NP film after drop-casting, and the contact area between the PVP-coated Cu NPs and the substrates was small, resulting in poor adhesion. The nuclear magnetic resonance (NMR) relaxation measu...
Source: Colloids and Surfaces A: Physicochemical and Engineering Aspects - February 10, 2020 Category: Chemistry Source Type: research

Enhanced activation of peroxymonosulfate using oxygen vacancy-enriched FeCo2O4−x spinel for 2,4-dichlorophenol removal: Singlet oxygen-dominated nonradical process
Publication date: Available online 9 February 2020Source: Colloids and Surfaces A: Physicochemical and Engineering AspectsAuthor(s): Yanbo Zhou, Yongli Zhang, Xiaomin HuAbstractThe introduction of oxygen vacancy (OV) is a promising strategy to boost performance for the removal of recalcitrant organic contaminants through sulfate radical-based advanced oxidation processes. Herein, a novel catalyst, namely, FeCo2O4−x nanoparticles (NPs) with abundant OV (FCOVNPs) was successfully obtained by a simple hydrothermal synthesis method, and its catalytic performance toward 2,4-dichlorophenol (2,4-DCP) removal was evaluated b...
Source: Colloids and Surfaces A: Physicochemical and Engineering Aspects - February 10, 2020 Category: Chemistry Source Type: research

Well-dispersed poly(cysteine)-Ni(OH)2 nanocomposites on graphene-modified electrode surface for highly sensitive non-enzymatic glucose detection
Publication date: Available online 7 February 2020Source: Colloids and Surfaces A: Physicochemical and Engineering AspectsAuthor(s): Yuanyuan Xue, Bowen Tian, Meijuan Wang, Tingting Zhai, Rui Li, Liang TanAbstractA kind of nickel-based nanomaterial was prepared and its application in the highly sensitive non-enzymatic glucose detection was realized in this article. Cyclic voltammetric scan generated the well-dispersed poly(cysteine)-Ni(OH)2 nanocomposites, which were analyzed by scanning electron microscopy, infrared spectroscopy and X-ray photoelectron spectroscopy, on the grephene-modified electrode surface. In strong al...
Source: Colloids and Surfaces A: Physicochemical and Engineering Aspects - February 8, 2020 Category: Chemistry Source Type: research

Narrow band-gap cathode Fe3(PO4)2 for sodium-ion battery with enhanced sodium storage
Publication date: Available online 7 February 2020Source: Colloids and Surfaces A: Physicochemical and Engineering AspectsAuthor(s): Hanqing Dai, Wenqian Xu, Yuanyuan Chen, Min Li, Zhihao Chen, Bobo Yang, Shiliang Mei, Wanlu Zhang, Fengxian Xie, Wei Wei, Ruiqian Guo, Guoqi ZhangAbstractIn recent years, the development of cathode materials for sodium-ion batteries is very rapid. This work provides the Fe3(PO4)2 micromaterials fabricated by the solvothermal method for sodium-ion battery cathode. The structure and the electronic conductivity were investigated by the first-principle. Sodium-ion battery exhibits excellent capac...
Source: Colloids and Surfaces A: Physicochemical and Engineering Aspects - February 8, 2020 Category: Chemistry Source Type: research

Capillary Rivulet Rise in Real-World Corners
Publication date: Available online 7 February 2020Source: Colloids and Surfaces A: Physicochemical and Engineering AspectsAuthor(s): Felix Gerlach, Jeanette Hussong, Ilia V Roisman, Cameron TropeaAbstractThe capillary rise of liquid in a perfect corner wedge has been well studied in the past, yielding a t1/3 rise behavior with no upper bound on the height of the rivulet. However, in real-world situations the wedge corner is often not exactly sharp, either because of roughness or fabrication imperfections. In the following study the behavior of capillary rivulet rise in rounded corners is examined experimentally and theoret...
Source: Colloids and Surfaces A: Physicochemical and Engineering Aspects - February 8, 2020 Category: Chemistry Source Type: research

Spreading and adhesion forces for water droplets on methylated glass surfaces
In this study, glass slide surfaces were modified with trimethylchlorosilane to fabricate surfaces of varying hydrophobicity. Then, the forces of spreading and adhesion were measured between water droplets and glass surfaces using a high-sensitivity microelectronic balance. Integrated with a digital camera, the experimental set-up recorded forces and water droplet deformations during water droplet attachment, spreading, compression and retraction processes. It was confirmed that the spreading force increases with decreasing advancing contact angle for methylated glass, following a similar correlation as observed for smooth...
Source: Colloids and Surfaces A: Physicochemical and Engineering Aspects - February 8, 2020 Category: Chemistry Source Type: research

Langmuir-Blodgett films of two chiral perylene bisimide-based molecules: aggregation and supramolecular chirality
Publication date: Available online 7 February 2020Source: Colloids and Surfaces A: Physicochemical and Engineering AspectsAuthor(s): Kai Ma, Ran Wang, Yandi Rao, Wei Zhao, Shufeng Liu, Tifeng JiaoAbstractPerylene bisimide (PBI) and its derivatives as building blocks for constructing nanostructures with functional properties have achieved considerable attention due to their applications in many fields. In this work, two chiral PBI derivatives (C6-SNPR and STDI2) molecules were utilized to prepare films by Langmuir-Blodgett (LB) technique at room temperature. Both molecules could form organized assemblies at air/water interf...
Source: Colloids and Surfaces A: Physicochemical and Engineering Aspects - February 8, 2020 Category: Chemistry Source Type: research

Polymer network strengthened filter paper for durable water disinfection
In this study, a filter-paper-based water disinfectant was fabricated by combining a tannic acid (TA) cross-linked gelatin (GEL) polymer network with an oxidized cellulose filter paper (OFP) through Schiff base linkages. The resulted OFP-GEL-TA filter paper showed enhanced tensile strength under wet conditions of 7.3-fold compared with the unmodified filter paper. And it maintained the high tensile strength after soaking in water for at least 36 h, indicating excellent durability of the OFP-GEL-TA. Moreover, as a biocompatible natural antibacterial agent, the cross-linker TA endowed the prepared OFP-GEL-TA with favorable...
Source: Colloids and Surfaces A: Physicochemical and Engineering Aspects - February 8, 2020 Category: Chemistry Source Type: research

Dual Responsive Cellulose Microspheres with High Solid-State Fluorescence Emission
We report here a facile approach to prepare cellulose microspheres with high solid-state fluorescence using 40% tetrabutylammonium hydroxide (TBAH). The fluorescence quenching effect due to the presence of Fe3O4 nanoparticles and solid-state quenching due to aggregation of fluorophore was systematically investigated. Microspheres with the detectable magnetic response and fluorescence quantum yield as high as 0.57 (FMB 414) was obtained by optimizing the reaction conditions. Such a high quantum yield has not been reported before for dual stimuli-responsive fluorescent microspheres. The magnetic and fluorescent properties we...
Source: Colloids and Surfaces A: Physicochemical and Engineering Aspects - February 7, 2020 Category: Chemistry Source Type: research

A dimensionless number for microwave non-equilibrium local heating through surfactant desorption
In this study, desorption of longer surfactant, Triton X-405 as a result of microwave irradiation was investigated at different power, and dimensionless number for the local heating around the interface was proposed to estimate surfactant behaviour for the desorption and disorder quantitatively.Graphical abstract (Source: Colloids and Surfaces A: Physicochemical and Engineering Aspects)
Source: Colloids and Surfaces A: Physicochemical and Engineering Aspects - February 7, 2020 Category: Chemistry Source Type: research

Promising electrodeposited biocompatible coatings for steel obtained from polymerized microemulsions
Publication date: Available online 4 February 2020Source: Colloids and Surfaces A: Physicochemical and Engineering AspectsAuthor(s): Paulina A. Trzaskowska, Aleksandra Poniatowska, Katarzyna Tokarska, Cezary Wiśniewski, Tomasz Ciach, Elżbieta MalinowskaAbstractSurprisingly, polymerized oil-in-water microemulsions containing soy lecithin have not yet been applied to obtain electrodeposited biocompatible coatings on stainless steel surface. Here, it was assumed that poly(methyl methacrylate) (PMMA) incorporated in the emulsion would strengthen the adhesion to steel surface which could result in prolonged sustainability dur...
Source: Colloids and Surfaces A: Physicochemical and Engineering Aspects - February 5, 2020 Category: Chemistry Source Type: research

Surface tension at the interface between aqueous solution of surfactant and alkane. A comprehensive quantum chemical and thermodynamic approach
Publication date: Available online 4 February 2020Source: Colloids and Surfaces A: Physicochemical and Engineering AspectsAuthor(s): E.S. Kartashynska, S.V. Lylyk, E.V. Aksenenko, A.V. Makievski, Yu.B. Vysotsky, V.B. Fainerman, R. MillerAbstractA thermodynamic model is used to analyse the adsorbed layers of CnDMPO (n = 12, 13), CnTAB (n = 10, 12, 14, 16) and SDS at the aqueous solution/hexane and aqueous solution/dodecane interfaces. The combined model assumes that the adsorption of alkane from the oil phase is governed by the Frumkin model, and the adsorption of the surfactant molecules from th...
Source: Colloids and Surfaces A: Physicochemical and Engineering Aspects - February 5, 2020 Category: Chemistry Source Type: research

Corrigendum to “Droplet evaporation: Colloidal interactions vs. evaporation kinetics” [Colloids Surf. A: Physicochem. Eng. Aspects 578 (2019) Article number 123555]
Publication date: Available online 4 February 2020Source: Colloids and Surfaces A: Physicochemical and Engineering AspectsAuthor(s): Mohamad Danial Shafiq, Franceska Waggett, Edward Norris, Paul Bartlett (Source: Colloids and Surfaces A: Physicochemical and Engineering Aspects)
Source: Colloids and Surfaces A: Physicochemical and Engineering Aspects - February 5, 2020 Category: Chemistry Source Type: research

Steric-effect-induced enhancement of electrokinetic energy conversion efficiency in curved nanochannels with rectangular sections at high zeta potentials
Publication date: Available online 4 February 2020Source: Colloids and Surfaces A: Physicochemical and Engineering AspectsAuthor(s): Yongbo Liu, Yongjun Jian, Chunhong YangAbstractIn this work, we investigate the electrokinetic energy conversion in curved rectangular nanochannels at high zeta potentials, intending to increase the efficiency of electrokinetic generation. As we demonstrate, the geometry effect can have an important role in the investigations of the conversion efficiency. In addition, we consider the influences of steric effect (the effect of finite ion size) on the energy conversion efficiency, which is sign...
Source: Colloids and Surfaces A: Physicochemical and Engineering Aspects - February 5, 2020 Category: Chemistry Source Type: research

Novel recoverable porous magnetic carbons derived from biobased polybenzoxazine by self-foaming and activation treatment
Publication date: Available online 4 February 2020Source: Colloids and Surfaces A: Physicochemical and Engineering AspectsAuthor(s): Zijian Feng, Ming Zeng, Dawei Meng, Wanlin Zhu, Yuhui Liu, Xuqiao HuangAbstractThe novel fully biobased polybenzoxazine derived carbon adsorbents containing Fe3O4 magnetic nanoparticles are prepared by solvothermal method, followed by activation and carbonization treatments. There are the polymerization and self-foaming reactions of benzoxazine monomers, and thermal decomposition of Ferrous acetylacetonate during in situ preparation of magnetic carbon precursors. The designed and fabricated p...
Source: Colloids and Surfaces A: Physicochemical and Engineering Aspects - February 5, 2020 Category: Chemistry Source Type: research

The facile synthesis and enhanced photocatalytic properties of ZnO@ZnS modified with Ag0 via in-situ ion exchange
Publication date: Available online 4 February 2020Source: Colloids and Surfaces A: Physicochemical and Engineering AspectsAuthor(s): Yufeng Yao, Yongcai Zhang, Ming Shen, Weizheng Li, Weiwei XiaAbstractA novel flower-like nonylresorcinol calix[4]arene (NRCA)-coated ZnO@ZnS@Ag core@shell heterostuctures were fabricated via in-situ ion exchange approach by controlling the addition order of the reagents. The synthesis of ZnO@ZnS attached with metallic Ag via twice ion exchange method combined with in-situ reduction has not been previously reported. The synthesized samples had higher absorption in the visible light region. The...
Source: Colloids and Surfaces A: Physicochemical and Engineering Aspects - February 5, 2020 Category: Chemistry Source Type: research

Facile preparation of zein nanoparticles with tunable surface hydrophobicity and excellent colloidal stability
Publication date: Available online 3 February 2020Source: Colloids and Surfaces A: Physicochemical and Engineering AspectsAuthor(s): Dandi Wang, Shengnan Tao, Shou-Wei Yin, Yajuan Sun, Yunxing LiAbstractHerein, zein nanoparticles (ZNPs) were prepared by a general and simple method through the combination of pH pretreatment and antisolvent precipitation. The resultant ZNPs have been extensively characterized by scanning electron microscopy, dynamic light scattering, fluorescence spectroscopy, zeta potential and contact angle measurements. It is worth noting that pH treatment of zein molecules can tune the surface property o...
Source: Colloids and Surfaces A: Physicochemical and Engineering Aspects - February 5, 2020 Category: Chemistry Source Type: research