Synthesis, characterization and solution properties of β-cyclodextrin-functionalized polyacrylamide/montmorillonite nanocomposites
Publication date: Available online 15 October 2018Source: Colloids and Surfaces A: Physicochemical and Engineering AspectsAuthor(s): Xu Hu, Yangchuan Ke, Yi Zhao, Shichao Lu, Qingchun Deng, Chengcheng Yu, Fangfang PengAbstractA novel nanocomposite (AAMC/O-Mt) of acrylamide (AM)/2-acrylamido-2-methyl propane sulfonic acid (AMPS)/modified β-cyclodextrin (MAH-β-CD)/organo-modified montmorillonite (O-Mt) was successfully prepared via in situ polymerization. The morphologies and structures of the O-Mt layers dispersion in the polymer matrix were detected using transmission electron microscopy (TEM) and X-ray diffracti...
Source: Colloids and Surfaces A: Physicochemical and Engineering Aspects - October 16, 2018 Category: Chemistry Source Type: research

Replicating and Resolving Wetting and Adhesion Characteristics of a Rose Petal
Publication date: Available online 15 October 2018Source: Colloids and Surfaces A: Physicochemical and Engineering AspectsAuthor(s): Udita Uday Ghosh, Sachin Nair, Anuja Das, Rabibrata Mukherjee, Sunando DasGuptaAbstractA Rose petal is well known for a unique form of hydrophobicity, exhibiting simultaneously high apparent equilibrium contact angle (θ*) as well as high adhesion that hinders the rolling off of droplets. This behaviour is fundamentally different than that commonly encountered in other bio-mimetic superhydrophobic surfaces (like a lotus leaf) that have air entrapped in th esolid-liquid contact zone (Cass...
Source: Colloids and Surfaces A: Physicochemical and Engineering Aspects - October 16, 2018 Category: Chemistry Source Type: research

Unexpected catalytic activity of Pd(II)-coordinated nucleotides in hydrogenation reduction
Publication date: Available online 13 October 2018Source: Colloids and Surfaces A: Physicochemical and Engineering AspectsAuthor(s): Ting Zou, You Han, Xinxue Li, Wei Li, Jinli Zhang, Yan FuAbstractControlled synthesis of noble metal nanocatalysts with desirable catalytic activities remains a great challenge. Inspired by electron-rich functional groups and supramolecular assembly properties of natural nucleotides, herein we propose a versatile approach to construct Pd nanocatalysts through employing seven nucleotides as both electron donors and stabilizers. The catalytic performance of nucleotide-Pd complexes are greatly a...
Source: Colloids and Surfaces A: Physicochemical and Engineering Aspects - October 14, 2018 Category: Chemistry Source Type: research

Phase Inversion of Emulsions Stabilized by Lipophilic Surfactants and SiO2 Nanoparticles
Publication date: Available online 12 October 2018Source: Colloids and Surfaces A: Physicochemical and Engineering AspectsAuthor(s): Ping Jiang, Lei Zhang, Jijiang Ge, Guicai Zhang, Haihua PeiAbstractThis paper investigates the effects of the SiO2 nanoparticle mass concentration (w/v %) and oleic acid imidazoline mass fraction (w/w %) on the property of the emulsion stabilized jointly by SiO2 and oleic acid imidazoline, with SiO2 nanoparticles initially dispersed in different phases. In the experiment, the SiO2 nanoparticle mass concentration in the aqueous or oil phases is fixed, and the surfactant mass fraction in oil is...
Source: Colloids and Surfaces A: Physicochemical and Engineering Aspects - October 13, 2018 Category: Chemistry Source Type: research

Charge and size matters—How to formulate organomodified silicones for textile applications
Publication date: 5 January 2019Source: Colloids and Surfaces A: Physicochemical and Engineering Aspects, Volume 560Author(s): Abhijeet Kumar, Alexandra Trambitas, Jörg Peggau, Verena Dahl, Joachim Venzmer, Tatiana Gambaryan-Roisman, Jochen KleinenAbstractOrganomodified silicones (OMS), which conventionally find use in textile finishing processes, have recently become a very interesting prospect in the field of fabric softeners. Here, we present OMS-based fabric softener formulations in the form of classical emulsion (droplet size ≈0.1 μm – 10 μm) and microemulsions (dropl...
Source: Colloids and Surfaces A: Physicochemical and Engineering Aspects - October 13, 2018 Category: Chemistry Source Type: research

Bioinspired Multifunctional Polymer–Nanoparticle–Surfactant Complex Nanocomposite Surfaces for Antibacterial Oil–Water Separation
Publication date: Available online 11 October 2018Source: Colloids and Surfaces A: Physicochemical and Engineering AspectsAuthor(s): A.W. Ritchie, H.J. Cox, S.N. Barrientos-Palomo, G.J. Sharples, J.P.S. BadyalAbstractBioinspired polymer–nanoparticle–fluorosurfactant complex composite coatings are shown to display fast-switching oleophobic–hydrophilic properties. The large switching parameters (difference between the equilibrium oil and water static contact angles) are attributed to nanoparticle enhanced surface roughening (leading to improvement in hydrophilicity and oleophobicity for optimum nanoparticle...
Source: Colloids and Surfaces A: Physicochemical and Engineering Aspects - October 13, 2018 Category: Chemistry Source Type: research

Formation of colloidal crystals of maghemite nanoparticles: Experimental and theoretical investigations
Publication date: Available online 11 October 2018Source: Colloids and Surfaces A: Physicochemical and Engineering AspectsAuthor(s): Anh-Tu Ngo, Salvatore Costanzo, Pierre-Antoine Albouy, Vincent Russier, Sawako Nakamae, Johannes Richardi, Isabelle LisieckiAbstractNovel colloidal crystals made of maghemite nanocrystals are fabricated by a co-evaporation method with a mixture of ethanol/hexane. Through a series of comprehensive characterization performed by grazing incidence small-angle X-ray scattering (GISAXS) and field emission gun scanning electron microscope (FEG-SEM), we show the first example of well-defined face-cen...
Source: Colloids and Surfaces A: Physicochemical and Engineering Aspects - October 13, 2018 Category: Chemistry Source Type: research

Core-shell Sm2O3@ZnO nano-heterostructure for the visible light driven photocatalytic performance
Publication date: Available online 10 October 2018Source: Colloids and Surfaces A: Physicochemical and Engineering AspectsAuthor(s): Jie Zeng, Zili Li, Hao Peng, Xiaogang ZhengABSTRACTZnO-coated Sm2O3 (Sm2O3@ZnO) nano-heterostructure was prepared for the visible light driven photodegradation of RhB. Core-shell Sm2O3@ZnO composites exhibited the enhanced photocatalytic activity compared with pure Sm2O3 and ZnO nanoparticles alone for RhB removal. Sm2O3@ZnO with the ZnO thickness of around 10 nm presented the best photocatalytic capacity and slightly deactivated after five cycle times. It’s attributed to the extended...
Source: Colloids and Surfaces A: Physicochemical and Engineering Aspects - October 11, 2018 Category: Chemistry Source Type: research

Layered chalcogenide modified by Lanthanum, calcium and magnesium for the removal of phosphate from water
Publication date: Available online 11 October 2018Source: Colloids and Surfaces A: Physicochemical and Engineering AspectsAuthor(s): Jian-Rong Li, Feng-Kang Wang, Hang Xiao, Lei Xu, Ming-Lai FuAbstractThe layered chalcogenide KMS-1 was modified by La/Ca/Mg via a simple ion exchange process for the removal of phosphate from water. La-modified KMS-1 (KLa), Ca-modified KMS-1 (KCa) and Mg-modified KMS-1 (KMg) were comparatively characterized using X-ray diffraction, BET surface area, zeta potential and scanning electron microscopy, respectively. It was found that the adsorption capacity of KLa was higher than that of KCa and K...
Source: Colloids and Surfaces A: Physicochemical and Engineering Aspects - October 11, 2018 Category: Chemistry Source Type: research

Physicochemical interactions of organic acids influencing microstructure and permselectivity of anion exchange membrane
Publication date: Available online 9 October 2018Source: Colloids and Surfaces A: Physicochemical and Engineering AspectsAuthor(s): Anusha Chandra, Bhuvanesh E, Sujay Chattopadhyay, sujay ChattopadhyayAbstractPermselectivity and water uptake behaviors of anion exchange membrane (AEM) were investigated with organic acids. Contribution of the number of carboxyl group (acetic acid: AA, malic acid: MA, citric acid: CA) and hydrocarbon chain lengths (formic acid: FA, AA, propionic acid: PA and n-butyric acid: BA) in water uptake and permselectivity values were separately investigated with five different concentrations 0.025, 0....
Source: Colloids and Surfaces A: Physicochemical and Engineering Aspects - October 10, 2018 Category: Chemistry Source Type: research

Fabrication of super-hydrophobic nickel film on copper substrate with improved corrosion inhibition by electrodeposition process
Publication date: Available online 9 October 2018Source: Colloids and Surfaces A: Physicochemical and Engineering AspectsAuthor(s): Zhen Yang, Xianping Liu, Yanling TianAbstractInspired by the famous “lotus effect”, we have fabricated the super-hydrophobic surfaces with nickel film on copper substrates using a one-step electrodeposition method. By adjusting processing time, water contact angle of as-prepared surfaces can reach as high as 160.3 ± 1.5° with small rolling angle of 3.0 ± 0.5°, showing excellent super-hydrophobicity. After the deposition of nickel co...
Source: Colloids and Surfaces A: Physicochemical and Engineering Aspects - October 10, 2018 Category: Chemistry Source Type: research

Effect of surfactant concentration on foam texture and flow characteristics in porous media
In this study, the effects of surfactant concentration on the foam texture, foam seepage characteristics, and gas saturation were evaluated by core-flow experiments using a high-pressure visualization device. The results show that the surface tension of gas and liquid decreases, the flow resistance in core increases, and the foam takes a longer time to reach stability with the increase in concentration of foaming agent. The blocking capability of foam in porous media is closely related to foam texture. With the increase in surfactant concentration, the average diameter of bubbles in porous media decreases, and the bubbles ...
Source: Colloids and Surfaces A: Physicochemical and Engineering Aspects - October 10, 2018 Category: Chemistry Source Type: research

Viscosity reduction of extra-heavy oil using toluene in water emulsions
Publication date: Available online 9 October 2018Source: Colloids and Surfaces A: Physicochemical and Engineering AspectsAuthor(s): Qianqian Chen, Yachao Zhu, Maoxin Wang, Gaihuan Ren, Qian Liu, Zhenghe Xu, Dejun SunABSTRACTSurfactants are widely used to reduce the viscosity of heavy oil by emulsification, but emulsification of an extra-heavy oil is difficult and does not even occur in some cases. A diluent is effective in reducing the viscosity of extra-heavy oil, but substantial volumes are required. In this work, we combined the advantages of a surfactant solution and a diluent in the form of emulsions to emulsify extra...
Source: Colloids and Surfaces A: Physicochemical and Engineering Aspects - October 9, 2018 Category: Chemistry Source Type: research

The role of a fatty alcohol in improving calcium minerals flotation with oleate
Publication date: Available online 9 October 2018Source: Colloids and Surfaces A: Physicochemical and Engineering AspectsAuthor(s): Lev O. Filippov, Inna V. Filippova, Zineb Lafhaj, Daniel FornasieroAbstractThe adsorption mechanism of collector mixtures and the implication for mineral flotation are discussed in light of the results of a quantitative study of the flotation of fluorapatite and calcite with mixtures of fatty alcohol and oleate collectors. It was found that the recovery of fluorapatite and calcite floated with oleate improved considerably after addition of the fatty alcohol. With oleate alone, the low mineral ...
Source: Colloids and Surfaces A: Physicochemical and Engineering Aspects - October 9, 2018 Category: Chemistry Source Type: research

Role of anion exchange membrane fouling in reverse electrodialysis using natural feed waters
Publication date: Available online 9 October 2018Source: Colloids and Surfaces A: Physicochemical and Engineering AspectsAuthor(s): T. Rijnaarts, J. Moreno, M. Saakes, W.M. de Vos, K. NijmeijerAbstractReverse electrodialysis (RED) is a process to harvest renewable energy from salinity gradients. Under lab conditions with artificial salt solutions, promising results have been achieved in recent years. However, in large scale industrial applications, natural waters are used and that poses challenges such as fouling. Fouling of anion exchange membranes (AEMs) by organic matter (e.g. humic acids) has been identified as a possi...
Source: Colloids and Surfaces A: Physicochemical and Engineering Aspects - October 9, 2018 Category: Chemistry Source Type: research

A new insight into the mechanism of the scale inhibition: DLS study of gypsum nucleation in presence of phosphonates using nanosilver dispersion as an internal light scattering intensity reference
Publication date: Available online 6 October 2018Source: Colloids and Surfaces A: Physicochemical and Engineering AspectsAuthor(s): Konstantin Popov, Maxim Oshchepkov, Elena Afanas’eva, Elena Koltinova, Yulia Dikareva, Hannu RönkkömäkiAbstractScaling in reverse osmosis facilities, boilers, heat exchangers, evaporation plants, and oilfield applications is a serious problem worldwide. A widely used solution for controlling scale deposition is an application of chemical inhibitors. However, irrespective of the broad and a long-term antiscalant application, the mechanisms of scale inhibition are still the ...
Source: Colloids and Surfaces A: Physicochemical and Engineering Aspects - October 7, 2018 Category: Chemistry Source Type: research

A new approach to determine the relative importance of DLVO and non-DLVO colloid retention mechanisms in porous media
Publication date: Available online 6 October 2018Source: Colloids and Surfaces A: Physicochemical and Engineering AspectsAuthor(s): Jannis F. Carstens, Jörg Bachmann, Insa NeuweilerAbstractThe DLVO (Derjaguin-Landau-Verwey-Overbeek) approach to predict colloid mobility in porous media is centered on solution ionic strength and physicochemical surface properties of colloids and solid matrix. However, several colloid retention mechanisms are not related to such interfacial properties, but instead to hydraulic features like flow regime and pore structure. We aimed to determine the relative importance of DLVO-related and ...
Source: Colloids and Surfaces A: Physicochemical and Engineering Aspects - October 7, 2018 Category: Chemistry Source Type: research

Evaluation of the colloidal/chemical performance of core-shell nanoparticle formed by zein and gum arabic
Publication date: Available online 6 October 2018Source: Colloids and Surfaces A: Physicochemical and Engineering AspectsAuthor(s): Guowen Chen, Yuying Fu, Fuge Niu, Hao Zhang, Xiaomeng Li, Xin LiAbstractTo evaluate the performance of biopolymer fabricated nanoparticle under commercial processing conditions, the stability of gum Arabic (GA)-zein-cur (curcumin) colloidal system was recorded and analyzed. The results showed that GA-zein-cur system is colloidal stable in the pH range of 5-8, however, encapsulated curcumin degraded rapidly as long as the pH changes. As for processing temperature, more than 70 °C wil...
Source: Colloids and Surfaces A: Physicochemical and Engineering Aspects - October 7, 2018 Category: Chemistry Source Type: research

Reconstructing micro/nano hierarchical structures particle with nanocellulose for superhydrophobic coatings
Publication date: Available online 6 October 2018Source: Colloids and Surfaces A: Physicochemical and Engineering AspectsAuthor(s): Xuemei Zheng, Shiyu FUAbstractNanocellulose, a nano blocks extracted from plant biomass, is a potential candidate for fabricating superhydrophobic materials by reconstructing roughness surface and modifying with low-surface-energy chemicals. In this work, a facile spray drying was used to prepare the nanocellulose-based micro-particles with hierarchical surface structure. The surface structure of particles can be regulated by changing the size of nanocellulose. The prepared particles were modi...
Source: Colloids and Surfaces A: Physicochemical and Engineering Aspects - October 7, 2018 Category: Chemistry Source Type: research

Transparent, Fluorine-Free, Heat-Resistant, Water Repellent Coating by Infusing Slippery Silicone Oil on Polysiloxane Nanofilament Layers prepared by Gas Phase Reaction of n-Propyltrichlorosilane and Methyltrichlorosilane
Publication date: Available online 25 September 2018Source: Colloids and Surfaces A: Physicochemical and Engineering AspectsAuthor(s): Esra Kasapgil, Ilke Anac, H. Yildirim ErbilABSTRACTThe subject of slippery liquid-infused porous surfaces (SLIPS) have attracted many researchers due to their excellent liquid repellent properties and widespread usage in many fields such as anti-wetting, anti-icing, omniphobic, self-cleaning and anti-biofouling surfaces. Choosing an environmentally friendly, durable lubricant and easy-clean preparation method is very important when designing SLIPS. In this work, fluorine-free, transparent, ...
Source: Colloids and Surfaces A: Physicochemical and Engineering Aspects - October 6, 2018 Category: Chemistry Source Type: research

Biodegradable pressure sensitive adhesives produced from vital wheat gluten: effect of glycerol as plasticizer
Publication date: Available online 26 September 2018Source: Colloids and Surfaces A: Physicochemical and Engineering AspectsAuthor(s): Tanara Sartori, Gabriela Feltre, Paulo Jose do Amaral Sobral, Rosiane Lopes da Cunha, Florencia Cecilia MenegalliAbstractThis work aimed at evaluating the influence of glycerol concentration and storage relative humidity (RH) on gluten-based adhesive properties. Adhesive aging and adhesive application over different food substrates were also evaluated. For such purpose, three adhesive formulations were developed from different gluten:glycerol ratios (1:0.6, 1:1, and 1:1.4), which were appli...
Source: Colloids and Surfaces A: Physicochemical and Engineering Aspects - October 6, 2018 Category: Chemistry Source Type: research

Preparation and characterization of perfluorocarbon microbubbles using Shirasu Porous Glass (SPG) membranes
In this study, a technique using Shirasu Porous Glass (SPG) membranes was used to produce perfluorocarbon microbubbles. The microbubbles obtained were characterized by their size, size distribution, and stability. The effect of several parameters on the microbubble's size was investigated related to the process (transmembrane pressure, ΔP, bubble point pressure, PBP, shear stress, τw), membrane pore size, Dp, and formulation (gas, surfactants in the aqueous phase). The transmembrane pressure nor the shear stress (τw) had influence on the microbubble's size or size distribution for ΔP/PBP
Source: Colloids and Surfaces A: Physicochemical and Engineering Aspects - October 6, 2018 Category: Chemistry Source Type: research

Superparamagnetic magnetite/IPEC particles
Publication date: Available online 27 September 2018Source: Colloids and Surfaces A: Physicochemical and Engineering AspectsAuthor(s): E.L. Brito, D.N. Gomes, C.C. Plá Cid, J.C.R. de Araújo, F. Bohn, L. Streck, J. L.C. FonsecaAbstractHybrid magnetic composites are materials with great potential for use in biomedicine and effluent treatments, as their organic phase may be used in the adsorption/release of pollutants/drugs and their magnetic properties for separation/transport of particulate systems based on these materials. In this work we obtained magnetic composite particles made of magnetite nanoparticles d...
Source: Colloids and Surfaces A: Physicochemical and Engineering Aspects - October 6, 2018 Category: Chemistry Source Type: research

A Method for Reversible Control over Nano-Roughness of Colloidal Particles
We report on a novel, simple method to induce and control nano-scale roughness on (water based) polymer latex colloids. Reducing the amount of dissolved gases in the aqueous phase from the electrolyte solution surrounding the particles, generates self-structured surface asperities with an amplitude that can be tuned via temperature and repetition of the treatment. Due to the viscoelastic nature of the polymeric asperities, a mild thermal treatment below the glass transition temperature can be used for nanostructure relaxation, so that the particles can recover their original topography, making this method fully reversible....
Source: Colloids and Surfaces A: Physicochemical and Engineering Aspects - October 6, 2018 Category: Chemistry Source Type: research

Innovative insight for sodium hexametaphosphate interaction with serpentine
Publication date: Available online 28 September 2018Source: Colloids and Surfaces A: Physicochemical and Engineering AspectsAuthor(s): Jiwei Lu, Mingjun Sun, Zhitao Yuan, Shengliang Qi, Zhongyun Tong, Lixia Li, Qingyou MengAbstractSerpentine, as a common magnesium silicate mineral found in many ores around the world, is usually dispersed/depressed with the dispersants/depressants by adsorbing on the surface of serpentine. Therefore, in this work, the interaction mechanism of the dispersant of sodium hexametaphosphate (SHMP) was investigated in detail though solution chemistry calculations, Fourier transform infrared spectr...
Source: Colloids and Surfaces A: Physicochemical and Engineering Aspects - October 6, 2018 Category: Chemistry Source Type: research

Charge and Size Matters – How to Formulate Organomodified Siloxanes for Textile Applications
Publication date: Available online 29 September 2018Source: Colloids and Surfaces A: Physicochemical and Engineering AspectsAuthor(s): Abhijeet Kumar, Alexandra Trambitas, Jörg Peggau, Verena Dahl, Joachim Venzmer, Tatiana Gambaryan-Roisman, Jochen KleinenABSTRACTOrganomodified siloxanes (OMS), which conventionally find use in textile finishing processes, have recently become a very interesting prospect in the field of fabric softeners. Here, we present OMS-based fabric softener formulations in the form of classical emulsion (droplet size ≈ 0.1 µm – 10 µm) and microemulsions (droplet si...
Source: Colloids and Surfaces A: Physicochemical and Engineering Aspects - October 6, 2018 Category: Chemistry Source Type: research

Janus liquid marbles containing both oil and water stabilised by silica or sericite particles
Publication date: Available online 30 September 2018Source: Colloids and Surfaces A: Physicochemical and Engineering AspectsAuthor(s): Andrew T. Tyowua, James M. Mooney, Bernard P. BinksAbstractThe preparation of Janus liquid marbles containing both oil and water is reported. The marbles were prepared by coalescing an oil liquid marble with a water liquid marble mechanically on a powdered bed of omniphobic solid particles, followed by further rolling on the particle bed so as to increase the particle coating and prevent disintegration upon removal. The coalescence of the marbles involves the rarification of the particle la...
Source: Colloids and Surfaces A: Physicochemical and Engineering Aspects - October 6, 2018 Category: Chemistry Source Type: research

Real-time detection of alcohol vapors and volatile organic compounds via optical electronic nose using carbon dots prepared from rice husk and density functional theory calculation
Publication date: Available online 30 September 2018Source: Colloids and Surfaces A: Physicochemical and Engineering AspectsAuthor(s): Nichaphat Thongsai, Nattapong Tanawannapong, Janjira Praneerad, Sumana Kladsomboon, Panichakorn Jaiyong, Peerasak PaoprasertAbstractRice husk, an agricultural waste that currently finds few uses, is rich in cellulose-based materials and silica. In this work, a simple one-pot method for preparing carbon dots and mesoporous silica from rice husk was developed, using hydrothermal and calcination methods. The carbon dots exhibited blue emission with excellent photostability, and had a diameter ...
Source: Colloids and Surfaces A: Physicochemical and Engineering Aspects - October 6, 2018 Category: Chemistry Source Type: research

PEGylated gold nanoparticles: stability, cytotoxicity and antibacterial activity
Publication date: Available online 3 October 2018Source: Colloids and Surfaces A: Physicochemical and Engineering AspectsAuthor(s): A. Reznickova, N. Slavikova, Z. Kolska, K. Kolarova, T. Belinova, M. Hubalek Kalbacova, M. Cieslar, V. SvorcikAbstractDesigning safe nanomaterials is nowadays a critical issue. A way to prepare PEGylated Au NPs by sputtering of Au into pure (PEG), thiol (PEG-SH) and amine terminated polyethylene glycols (PEG-NH2) was explored. Structural characterizations, aging and thermal stability were performed using transmission electron microscope (TEM/HRTEM) and UV-Vis spectroscopy. By TEM we observed t...
Source: Colloids and Surfaces A: Physicochemical and Engineering Aspects - October 6, 2018 Category: Chemistry Source Type: research

Porous carbon nanoplate/Se composite derived from potassium citrate as high-performance Li-Se battery cathode: a study on structure-function relation
Publication date: Available online 3 October 2018Source: Colloids and Surfaces A: Physicochemical and Engineering AspectsAuthor(s): Chenhao Zhao, Zhibiao Hu, Jiangshui LuoAbstractrPorous carbon box or nanoplate has been prepared by synchronous carbonization/activation of potassium citrate, and the corresponding porous carbon nanoplate/Se composite can be obtained using a melting-diffusion method. The influence of structure parameters including specific surface area and porous structure of porous carbon and resultant carbon/Se composite on electrochemical properties are studied. It is found a moderate micropore size of carb...
Source: Colloids and Surfaces A: Physicochemical and Engineering Aspects - October 6, 2018 Category: Chemistry Source Type: research

Sticky Hydrophobic Behavior of Cellulose Substrates Impregnated with Alkyl Ketene Dimer (AKD) via Sub- and Supercritical Carbon Dioxide
Publication date: Available online 3 October 2018Source: Colloids and Surfaces A: Physicochemical and Engineering AspectsAuthor(s): Kolawole Adenekan, Brenda Hutton-PragerAbstractCellulose fibers were impregnated with alkyl ketene dimer (AKD) dissolved in n-heptane and carbon dioxide via sub- and supercritical impregnation techniques. The mechanistic pathways and hydrophobic performance at short and long times were investigated by contact angle (CA) analysis, scanning electron microscopy (SEM) with micrographs analyzed using Image-Pro Premier, and Fourier Transform Infrared (FTIR) analysis. The sizing development was signi...
Source: Colloids and Surfaces A: Physicochemical and Engineering Aspects - October 6, 2018 Category: Chemistry Source Type: research

A novel crosslinked β-cyclodextrin-based polymer for removing methylene blue from water with high efficiency
Publication date: Available online 3 October 2018Source: Colloids and Surfaces A: Physicochemical and Engineering AspectsAuthor(s): Hong-Liu Jiang, Jie-Ci Lin, Wei Hai, Hong-Wei Tan, Yu-Wei Luo, Xiao-Lin Xie, Yao Cao, Fu-An HeAbstractIn this work, a novel crosslinked porous β-cyclodextrin-based polymer containing carboxylic acid groups (CT-β-CD) was synthesized successfully and characterized by SEM, FTIR, 13C solid-state NMR, water-contact-angle measurement, and TGA. The resultant CT-β-CD with triple absorption effects including inclusion complextion, porous network capture, and electrostatic interaction was...
Source: Colloids and Surfaces A: Physicochemical and Engineering Aspects - October 6, 2018 Category: Chemistry Source Type: research

On the lifetime of evaporating confined sessile droplets
Publication date: Available online 4 October 2018Source: Colloids and Surfaces A: Physicochemical and Engineering AspectsAuthor(s): Sandeep Hatte, Riju Dhar, Lalit Bansal, Suman Chakraborty, Saptarshi BasuAbstractConfinement effects may trigger certain non-trivial characteristics of droplet evaporation, which may incur far-reaching implications in practical scenarios. In effect, the vapor mediated interactions in a confined droplet may alter its intrinsic evaporation characteristics altogether, primarily as a consequence of significant increase in droplet lifetime due to enriched accumulation of the vapor field in the vici...
Source: Colloids and Surfaces A: Physicochemical and Engineering Aspects - October 6, 2018 Category: Chemistry Source Type: research

Characteristic responses of a 1,2-dipalmitoleoyl-sn-glycero-3- phosphoethanolamine molecular layer depending on the number of CH(OH) groups in polyols
Publication date: Available online 4 October 2018Source: Colloids and Surfaces A: Physicochemical and Engineering AspectsAuthor(s): Satoshi Nakata, Mio Nomura, Yuta Yamaguchi, Mafumi Hishida, Hiroyuki Kitahata, Yukiteru Katsumoto, Mitsuhiro Denda, Noriyuki KumazawaAbstractTo elucidate the effect of polyols on a phospholipid molecular layer, different polyols with the formula H-(CH(OH))m-H (m = 2-6) were added to a phospholipid (1,2-dipalmitoleoyl-sn-glycero-3-phosphoethanolamine (DPoPE)) solution above and below the phase transition temperature between the lamellar and inverted hexagonal phases. As for the su...
Source: Colloids and Surfaces A: Physicochemical and Engineering Aspects - October 6, 2018 Category: Chemistry Source Type: research

A Water-Stable Triazine-Based Metal-Organic Framework as an Efficient Adsorbent of Pb(II) Ions
We report here a water stable metal-organic frameworks (CAU-7-TATB), and the ligands contain N, which provides binding sites for metal ions. CAU-7-TATB exhibits fast adsorption kinetics, high adsorption capacity towards Pb(II). More importantly, CAU-7-TATB remains high prior adsorption towards Pb(II) in the presence of interfering ions like Cr(III), Co(II), Ni(II), Mn(II), Zn(II), Mg(II) and Ca(II), which is potentially applicable in removing Pb(II) from industrial water.Graphical abstract (Source: Colloids and Surfaces A: Physicochemical and Engineering Aspects)
Source: Colloids and Surfaces A: Physicochemical and Engineering Aspects - October 6, 2018 Category: Chemistry Source Type: research

Specific formation of hydrophobic aggregates of ionic thermoresponsive polymers with oppositely charged ionic surfactants under extremely dilute conditions
Publication date: Available online 4 October 2018Source: Colloids and Surfaces A: Physicochemical and Engineering AspectsAuthor(s): Nobuo UeharaAbstractCationic and anionic thermoresponsive polymers were synthesized and the formation of their hydrophobic aggregates with ionic surfactants was studied at extremely low polymer concentrations. Alongside the hydrophobic interactions, electrostatic interactions between the ionic groups of the polymers and surfactants played a major role in the formation of the hydrophobic aggregates. In the absence of an ionic surfactant, extremely dilute (i.e., 0.01 wt %) polymer solutio...
Source: Colloids and Surfaces A: Physicochemical and Engineering Aspects - October 6, 2018 Category: Chemistry Source Type: research

Polycarboxylic magnetic polydopamine sub-microspheres for effective adsorption of malachite green
Publication date: Available online 4 October 2018Source: Colloids and Surfaces A: Physicochemical and Engineering AspectsAuthor(s): Xihao Pan, Gancheng Zuo, Ting Su, Siyao Cheng, Yufan Gu, Xiaoliang Qi, Wei DongAbstractMagnetic particle is a promising class of materials to absorb harmful contaminants for their easy collecting property with magnetic response. Here, we report a novel kind of polycarboxylic magnetic polydopamine sub-microspheres (Fe3O4@PDA-COOH) facilely synthesized by coating polydopamine (PDA) onto the surface of magnetic nanocrystal clusters (Fe3O4). Then the sub-microspheres were modified with mercaptosuc...
Source: Colloids and Surfaces A: Physicochemical and Engineering Aspects - October 6, 2018 Category: Chemistry Source Type: research

A highly efficient decontamination foam stabilized by well-dispersed mesoporous silica nanoparticles
Publication date: Available online 4 October 2018Source: Colloids and Surfaces A: Physicochemical and Engineering AspectsAuthor(s): In-Ho Yoon, Suk Bon Yoon, Chong-Hun Jung, Chorong Kim, Seonbyeong Kim, Jei-Kwon Moon, Wang-Kyu ChoiABSTRACTA foam with high stability for the efficient decontamination of radioactive materials has been prepared by using well-dispersed mesoporous silica nanoparticles (NPs). Three different types of silica NPs were tested: solvent-extracted mesoporous silica (SMS) NPs, calcined mesoporous silica (CMS) NPs, and commercial silica (M-5) NPs. The stability and decontamination efficiency of the foam ...
Source: Colloids and Surfaces A: Physicochemical and Engineering Aspects - October 6, 2018 Category: Chemistry Source Type: research

Removal of Ni(II) from aqueous solutions using activated carbon with manganese formate hydrate in-situ modification
In this study, a novel manganese formate hydrate (MFH) in-situ modified activated carbon (AC-MFH) has been proposed and investigated. The physical and chemical characteristics of adsorbents were characterized by N2 adsorption/desorption, Fourier transform infrared (FTIR), X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). The results showed that AC-MFH had more microporous structures and surface oxygen-containing functional groups than AC. The Ni(II) adsorption behaviors of adsorbents were investigated by batch experiments, the results suggested that AC-MFH showed 20% higher Ni(II) adsorption capacity than...
Source: Colloids and Surfaces A: Physicochemical and Engineering Aspects - October 6, 2018 Category: Chemistry Source Type: research

Synthesis of One-Dimensional RuO2 Nanorod for Hydrogen and Oxygen Evolution Reaction: An Efficient and Stable Electrocatalyst
Publication date: Available online 4 October 2018Source: Colloids and Surfaces A: Physicochemical and Engineering AspectsAuthor(s): Roshan Nazir, Uttaran Basak, Surojit PandeAbstractRuO2 nanorod (NR), an efficient and stable catalyst for hydrogen and oxygen evolution reaction is developed via wet-chemical route. Initially, a carbon slurry has been prepared using glucose and urea via heating at 140 °C for 6 h. During the preparation of carbon slurry Ru3+ salt has been added to disperse homogeneously. Finally, calcination at 500 °C for 10 h has been performed using homogeneously distribute...
Source: Colloids and Surfaces A: Physicochemical and Engineering Aspects - October 6, 2018 Category: Chemistry Source Type: research

Fabrication and electrochemical properties of alizarin -aminophenylboronic acid ensembled with layered double hydroxide for glucose sensing selectivity
Publication date: Available online 4 October 2018Source: Colloids and Surfaces A: Physicochemical and Engineering AspectsAuthor(s): Haiqin Wu, Liang Yan, Liyang Fu, Lan JinAbstractThe interaction of alizarin with aminophenylboronic acid (ARS-PBA) was used through a new strategy for electrochemical sensors of glucose. In the present work, ARS-PBA complex and the layered double hydroxide nanosheets (LDH nanosheets) were successfully assembled on indium tin oxide (ITO) electrodes via layer by layer technology method. The resulted electrode was characterized by UV-vis, X-ray diffraction (XRD), atomic force microscope (AFM) and...
Source: Colloids and Surfaces A: Physicochemical and Engineering Aspects - October 6, 2018 Category: Chemistry Source Type: research

The study of titanium dioxide modification by glutaraldehyde and its application of immobilized penicillin acylase
Publication date: Available online 5 October 2018Source: Colloids and Surfaces A: Physicochemical and Engineering AspectsAuthor(s): Xudong Wang, Zhangjun Chen, Ke Li, Xiaodong Wei, Zhenbin Chen, Juan M. Ruso, Zhenghua Tang, Zhen LiuAbstractIn this work, titanium dioxide particle was firstly modified with glutaraldehyde, and modification conditions, i.e. particle size (d), active temperature (Ta), modification temperature (Tm ), modification time (tm), pH value, aldehyde ethanol ratio (Ra) and ethanol ratio (Re), were studied and optimized adopting grafting rate (Gr) as the optimizing index, the ultraviolet-visible spectrop...
Source: Colloids and Surfaces A: Physicochemical and Engineering Aspects - October 6, 2018 Category: Chemistry Source Type: research

Topological Control of Polystyrene-Silica Core-Shell Microspheres
Publication date: Available online 5 October 2018Source: Colloids and Surfaces A: Physicochemical and Engineering AspectsAuthor(s): Zane A. Grady, Alexandria Z. Arthur, Christopher J. WohlAbstractControllable surface morphology is requisite across a gamut of processes, industries, and applications. The surface morphology of silica-coated polystyrene microspheres was controllably modified to enable generation of both smooth and bumpy, or raspberry-like, surfaces. Although smooth and raspberry-like silica shells on polystyrene templates have been demonstrated extensively, the method described here used readily available mate...
Source: Colloids and Surfaces A: Physicochemical and Engineering Aspects - October 6, 2018 Category: Chemistry Source Type: research

Impact of fatty acids unsaturation on stability and intestinal lipolysis of bioactive lipid droplets
Publication date: Available online 5 October 2018Source: Colloids and Surfaces A: Physicochemical and Engineering AspectsAuthor(s): Dafna Meshulam Pascoviche, Neta Goldstein, Ayelet Fishman, Uri LesmesAbstractEmulsions are complex mixtures of immiscible liquids that are widely spread in foods and considered as natural, efficient and cost effective tools to deliver lipophilic bioactives to the consumer. Many recent studies seek to elucidate the principles for formulating emulsions with novel bioactive ingredients, such as bovine lactoferrin or bioactive lipids, towards enhanced and extended emulsion functionality. This rese...
Source: Colloids and Surfaces A: Physicochemical and Engineering Aspects - October 6, 2018 Category: Chemistry Source Type: research

Emulsion properties of Asafoetida gum: effect of oil concentration on stability and rheological properties
Publication date: Available online 6 October 2018Source: Colloids and Surfaces A: Physicochemical and Engineering AspectsAuthor(s): Sima Saeidy, Ali Nasirpour, Gholamreza Djelveh, Alina-Violeta Ursu, Cédric Delattre, Guillaume Pierre, Philippe MichaudAbstractSolutions of Asafoetida gum (2 % w/w) were used to prepare oil in water emulsion with various oil/gum solution ratios (0.5, 1.0, 2.0, 3.0 and 4.0 v/v). Stability and rheological properties of the emulsions were examined over 28 days of storage at 20 °C. It was revealed that increasing oil volume fraction enhanced the emulsion stability. The results of...
Source: Colloids and Surfaces A: Physicochemical and Engineering Aspects - October 6, 2018 Category: Chemistry Source Type: research

Fractal dimensions and morphological characteristics of aggregates formed in different physico-chemical and mechanical flocculation environments
Publication date: Available online 6 October 2018Source: Colloids and Surfaces A: Physicochemical and Engineering AspectsAuthor(s): Léa Guérin, Christine Frances, Alain Liné, Carole Coufort-SaudejaudAbstractFlocculation experiments were performed in a Taylor-Couette reactor in turbulent conditions characterized by the mean shear rate. A sequenced hydrodynamic protocol was applied which consists in low and high shear rates steps allowing to promote respectively aggregation and breakage processes. The particle size distribution and the 3D fractal dimension were determined on line by laser diffraction whi...
Source: Colloids and Surfaces A: Physicochemical and Engineering Aspects - October 6, 2018 Category: Chemistry Source Type: research

Nitrite desorption from activated carbon fiber during capacitive deionization (CDI) and membrane capacitive deionization (MCDI)
In this study, nitrite desorption from activated carbon fiber (ACF) in capacitive deionization (CDI) and membrane capacitive deionization (MCDI) was examined and the effects of the operation parameters (pH, voltage, temperature and flow rate) and co-existing matters were deeply investigated. Desorption mechanisms were analyzed via Brunauer–Emmett–Teller (BET) and Fourier transform infrared spectroscopy (FTIR). Results showed that the final desorption ratio increased from 0 to 100% in MCDI and the enhancement was also observed in CDI that the ratio increased from 18.7 to 83.5% when solution pH increased from 2 t...
Source: Colloids and Surfaces A: Physicochemical and Engineering Aspects - October 6, 2018 Category: Chemistry Source Type: research

Role of chemical reaction and drag force during drop impact gelation process
Publication date: 20 December 2018Source: Colloids and Surfaces A: Physicochemical and Engineering Aspects, Volume 559Author(s): Krishnayan Haldar, Sudipto ChakrabortyAbstractAn instantaneous chemical reaction and solidification have been experimentally explored during sodium alginate drop impact on calcium chloride liquid pool through a high-speed imaging system. Here, different concentrations of sodium alginate are used to study the effect on gelation process. As soon as the alginate drop touches the calcium chloride pool, a crosslinking polymerization reaction starts under the liquid pool surface. The consequence of cro...
Source: Colloids and Surfaces A: Physicochemical and Engineering Aspects - October 6, 2018 Category: Chemistry Source Type: research

Examination of disproportionate permeability reduction mechanism on rupture of hydrogels performance
Publication date: 5 January 2019Source: Colloids and Surfaces A: Physicochemical and Engineering Aspects, Volume 560Author(s): Mahsa Baghban Salehi, Mina Soleimanian, Asefe Mousavi MoghadamAbstractIn this paper, the overall performance of a disproportionate permeability reduction mechanism for a sulfonated polyacrylamide copolymer and the chromium triacetate crosslinker was investigated. A home-built gel filtration system was used for visual inspections and evaluations of the hydrogel performance. The experiments were conducted based on rheological test plans, energy-dispersive X-ray spectroscopy, and scanning electron mic...
Source: Colloids and Surfaces A: Physicochemical and Engineering Aspects - October 6, 2018 Category: Chemistry Source Type: research

Reduced graphene oxide supporting Ag meso-flowers and phenyl-modified graphitic carbon nitride as self-cleaning flexible SERS membrane for molecular trace-detection
Publication date: 5 January 2019Source: Colloids and Surfaces A: Physicochemical and Engineering Aspects, Volume 560Author(s): Hengwei Qiu, Jun Guo, Minqiang Wang, Shangdong Ji, Minghui Cao, Muhammad Amin Padhiar, Arshad Saleem BhattiAbstractThere is an imperious demand on developing of self-cleaning surface enhanced Raman scattering (SERS) substrates, for eliminating traditional single-use substrates. Herein, ternary flexible membranes of reduced graphene oxide (r-GO) supporting Ag meso-flowers (Ag-MFs) and phenyl-modified graphitic carbon nitride nanosheets (PCNs) were fabricated for photocatalysis-driven self-cleaning S...
Source: Colloids and Surfaces A: Physicochemical and Engineering Aspects - October 6, 2018 Category: Chemistry Source Type: research