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Advances in Colloid and Interface Science

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https://www.readbyqxmd.com/read/29934140/wall-slip-for-complex-liquids-phenomenon-and-its-causes
#1
REVIEW
A Ya Malkin, S A Patlazhan
In this review, we tried to qualify different types and mechanisms of wall slip phenomenon, paying particular attention to the most recent publications and issues. The review covers all type of fluids - homogeneous low molecular weight liquids, polymer solution, multi-component dispersed media, and polymer melts. We focused on two basic concepts - fluid-solid wall interaction and shear-induced fluid-to-solid transitions - which are the dominant mechanisms of wall slip. In the first part of the review, the theoretical and numerical studies of correlation of wetting properties and wall slip of low molecular weight liquids and polymeric fluids are reviewed along with some basic experimental results...
June 15, 2018: Advances in Colloid and Interface Science
https://www.readbyqxmd.com/read/29925466/a-comprehensive-review-on-rheological-studies-of-sludge-from-various-sections-of-municipal-wastewater-treatment-plants-for-enhancement-of-process-performance
#2
REVIEW
Eugene Hong, Anteneh Mesfin Yeneneh, Tushar Kanti Sen, Ha Ming Ang, Ahmet Kayaalp
Large quantities of sludge is generated from different sections of a wastewater treatment plant operation. Sludge can be a solid, semisolid or liquid muddy residual material. Understanding the flow behaviour and rheological properties of sewage sludge at different sections of a wastewater treatment plant (WWTP) is important for the design of pumping system, mixing, hydrodynamics and mass transfer rates of various sludge treatment units, optimization of conditioning dose and for sustainable sludge management...
June 15, 2018: Advances in Colloid and Interface Science
https://www.readbyqxmd.com/read/29937230/polyphenols-at-interfaces
#3
REVIEW
François Reitzer, Manon Allais, Vincent Ball, Florent Meyer
Polyphenols are important molecules in living organisms, particularly in plants, where they serve as protectants against predators. They are also of fundamental importance in pharmacology for their antioxidant and antibacterial activities. Since a few years polyphenols are also used in surface functionalization mimicking the tannin deposition observed when tea or red wine are in contact with the surface of cups or glasses respectively. The interaction of polyphenols with proteins to yield colloids and of polyphenol with surfaces will be reviewed in this article to provide an overview of such particles and surface functionalization methods in modern surface science...
June 7, 2018: Advances in Colloid and Interface Science
https://www.readbyqxmd.com/read/29887382/halloysite-clay-nanotubes-for-life-sciences-applications-from-drug-encapsulation-to-bioscaffold
#4
REVIEW
Ana C Santos, Carolina Ferreira, Francisco Veiga, António J Ribeiro, Abhishek Panchal, Yuri Lvov, Anshul Agarwal
Natural forming clay halloysite is an emerging nanomaterial carrier for sustained drug delivery. These 50 nm diameter aluminosilicate tubes, with inner - alumina and outer - silica surface layers, can be loaded with 10-30 wt% of drug molecules, DNA and enzymes. The opposite charge of the inner and outer halloysite surface allow for selective drug adsorption inside or outside the clay nanotubes. The drug loaded halloysite enhanced the zeta potential of minus 50-60 mV allowing for stable aqueous nanocolloids...
May 31, 2018: Advances in Colloid and Interface Science
https://www.readbyqxmd.com/read/29859615/microrheology-advances-in-methods-and-insights
#5
REVIEW
Qiuyang Xia, Huining Xiao, Yuanfeng Pan, Lidong Wang
Microrheology is an emerging technique that probes mechanical response of soft material at micro-scale. Generally, microrheology technique can be divided into active and passive versions. During last two decades, extensive efforts have been paid to improve both the experiment techniques and data analysis methods, especially about how to link consequential particle positions into trajectories. We review the recent advances in microrheology, including improvements in labeling, imaging, data acquiring, data processing and data interpretation...
April 21, 2018: Advances in Colloid and Interface Science
https://www.readbyqxmd.com/read/29804691/an-overview-of-the-transport-of-liquid-molecules-through-structured-polymer-films-barriers-and-composites-experiments-correlated-to-structure-based-simulations
#6
REVIEW
Sofie Gårdebjer, Mikael Larsson, Tobias Gebäck, Marie Skepö, Anette Larsson
Films engineered to control the transport of liquids are widely used through society. Examples include barriers in packaging, wound care products, and controlled release coatings in pharmaceutics. When observed at the macroscopic scale such films commonly appear homogeneous, however, a closer look reveals a complex nano- and microstructure that together with the chemical properties of the different domains control the transport properties. In this review we compare and discuss macroscopic transport properties, measured using the straightforward, yet highly powerful technique "modified Ussing chambers", also denoted side-by-side diffusion cells, for a wide range of structured polymer films and composites...
June 2018: Advances in Colloid and Interface Science
https://www.readbyqxmd.com/read/29804690/growth-of-wormlike-micelles-in-nonionic-surfactant-solutions-quantitative-theory-vs-experiment
#7
REVIEW
Krassimir D Danov, Peter A Kralchevsky, Simeon D Stoyanov, Joanne L Cook, Ian P Stott, Eddie G Pelan
Despite the considerable advances of molecular-thermodynamic theory of micelle growth, agreement between theory and experiment has been achieved only in isolated cases. A general theory that can provide self-consistent quantitative description of the growth of wormlike micelles in mixed surfactant solutions, including the experimentally observed high peaks in viscosity and aggregation number, is still missing. As a step toward the creation of such theory, here we consider the simplest system - nonionic wormlike surfactant micelles from polyoxyethylene alkyl ethers, Ci Ej ...
June 2018: Advances in Colloid and Interface Science
https://www.readbyqxmd.com/read/29801695/drop-impact-on-an-airfoil-surface
#8
REVIEW
Zhenlong Wu
Drop impact on an airfoil surface takes place in drop-laden two-phase flow conditions such as rain and icing, which are encountered by wind turbines or airplanes. This phenomenon is characterized by complex nonlinear interactions that manifest rich flow physics and pose unique modeling challenges. In this article, the state of the art of the research about drop impact on airfoil surface in the natural drop-laden two-phase flow environment is presented. The potential flow physics, hazards, characteristic parameters, droplet trajectory calculation, drop impact dynamics and effects are discussed...
June 2018: Advances in Colloid and Interface Science
https://www.readbyqxmd.com/read/29789126/a-comprehensive-review-on-self-healing-of-asphalt-materials-mechanism-model-characterization-and-enhancement
#9
REVIEW
Daquan Sun, Guoqiang Sun, Xingyi Zhu, Alvaro Guarin, Bin Li, Ziwei Dai, Jianming Ling
Self-healing has great potential to extend the service life of asphalt pavement, and this capability has been regarded as an important strategy when designing a sustainable infrastructure. This review presents a comprehensive summary of the state-of-the-art investigations concerning the self-healing mechanism, model, characterization and enhancement, ranging from asphalt to asphalt pavement. Firstly, the self-healing phenomenon as a general concept in asphalt materials is analyzed including its definition and the differences among self-healing and some viscoelastic responses...
June 2018: Advances in Colloid and Interface Science
https://www.readbyqxmd.com/read/29776585/tears-of-wine-the-dance-of-the-droplets
#10
REVIEW
Alex Nikolov, Darsh Wasan, Jongju Lee
For a long time, the phenomenon known as the "tears of wine" was believed to be due only to the surface tension gradient (e.g., the Thomson-Marangoni stress on the fluid/fluid surface's dynamics of wetting) and gravity. We experimentally demonstrated that the wine tear formation is not solely due to the surface tension gradient; instead, the ridge instability triggers the wine tears. Pouring wine into a glass causes a wine film to form on the glass. The film drains down under gravity and a ridge forms at its upper part...
June 2018: Advances in Colloid and Interface Science
https://www.readbyqxmd.com/read/29776584/dopamine-assisted-co-deposition-an-emerging-and-promising-strategy-for-surface-modification
#11
REVIEW
Wen-Ze Qiu, Hao-Cheng Yang, Zhi-Kang Xu
Mussel-inspired chemistry based on polydopamine (PDA) deposition has been developed as a facile and universal method for the surface modification of various materials. However, the inherent shortcomings of PDA coatings still impede their practical applications in the development of functional materials. In this review, we introduce the recent progress in the emerging dopamine-assisted co-deposition as a one-step strategy for functionalizing PDA-based coatings, and improving them in the aspects of deposition rate, morphology uniformity, surface wettability and chemical stability...
June 2018: Advances in Colloid and Interface Science
https://www.readbyqxmd.com/read/29747852/a-review-of-aqueous-foam-in-microscale
#12
REVIEW
Abdolhamid Anazadehsayed, Nastaran Rezaee, Jamal Naser, Anh V Nguyen
In recent years, significant progress has been achieved in the study of aqueous foams. Having said this, a better understanding of foam physics requires a deeper and profound study of foam elements. This paper reviews the studies in the microscale of aqueous foams. The elements of aqueous foams are interior Plateau borders, exterior Plateau borders, nodes, and films. Furthermore, these elements' contribution to the drainage of foam and hydraulic resistance are studied. The Marangoni phenomena that can happen in aqueous foams are listed as Marangoni recirculation in the transition region, Marangoni-driven flow from Plateau border towards the film in the foam fractionation process, and Marangoni flow caused by exposure of foam containing photosurfactants under UV...
June 2018: Advances in Colloid and Interface Science
https://www.readbyqxmd.com/read/29735162/the-development-of-a-novel-smart-material-based-on-colloidal-microgels-and-cotton
#13
LETTER
Natasa Majcen, Reham Mohsen, Martin J Snowden, John C Mitchell, Bojana Voncina
Colloidal microgels are often described as "smart" due to their ability to undergo quite dramatic conformational changes in response to a change in their environmental conditions (e.g. temperature, pH). A range of novel smart materials were developed by the incorporation of colloidal microgels into cotton fabric. A series of microgels have been prepared by a surfactant free emulsion polymerization based on N-isopropylacrylamide (NIPAM) monomer. Poly(NIPAM) is a thermosensitive polymer which undergoes a conformational transition close to the human skin temperature...
June 2018: Advances in Colloid and Interface Science
https://www.readbyqxmd.com/read/29731110/engineered-nanomaterials-growth-control-by-monomers-and-micelles-from-surfactants-to-surface-active-polymers
#14
REVIEW
Mandeep Singh Bakshi
In pseudo-micellar phase, the crystal growth is primarily achieved by the surface activity of the monomers in the presence of micelles. To ensure the maximum potential of surface activity of monomers in morphology control, a micellar phase is required. This account specifically focuses on the crystal growth control by the surface active monomers of conventional surfactants and that of water soluble polymers. It also distinguishes the mechanisms involved in the shape control driven by the micellar phase of micelle forming polymers, their role as nanoreactors, micellar stability, and micellar transitions from the monomeric phase...
June 2018: Advances in Colloid and Interface Science
https://www.readbyqxmd.com/read/29728156/liquid-foam-templating-a-route-to-tailor-made-polymer-foams
#15
REVIEW
Sébastien Andrieux, Aggeliki Quell, Cosima Stubenrauch, Wiebke Drenckhan
Solid foams with pore sizes between a few micrometres and a few millimetres are heavily exploited in a wide range of established and emerging applications. While the optimisation of foam applications requires a fine control over their structural properties (pore size distribution, pore opening, foam density, …), the great complexity of most foaming processes still defies a sound scientific understanding and therefore explicit control and prediction of these parameters. We therefore need to improve our understanding of existing processes and also develop new fabrication routes which we understand and which we can exploit to tailor-make new porous materials...
June 2018: Advances in Colloid and Interface Science
https://www.readbyqxmd.com/read/29724405/zeta-potentials-of-the-rare-earth-element-fluorcarbonate-minerals-focusing-on-bastn%C3%A3-site-and-parisite
#16
REVIEW
C L Owens, G R Nash, K Hadler, R S Fitzpatrick, C G Anderson, F Wall
Rare earth elements (REE) are critical to a wide range of technologies ranging from mobile phones to wind turbines. Processing and extraction of REE minerals from ore bodies is, however, both challenging and relatively poorly understood, as the majority of deposits contain only limited enrichment of REEs. An improved understanding of the surface properties of the minerals is important in informing and optimising their processing, in particular for separation by froth flotation. The measurement of zeta potential can be used to extract information regarding the electrical double layer, and hence surface properties of these minerals...
June 2018: Advances in Colloid and Interface Science
https://www.readbyqxmd.com/read/29705027/the-chemical-not-mechanical-paradigm-of-thermodynamics-of-colloid-and-interface-science
#17
REVIEW
George Kaptay
In the most influential monograph on colloid and interfacial science by Adamson three fundamental equations of "physical chemistry of surfaces" are identified: the Laplace equation, the Kelvin equation and the Gibbs adsorption equation, with a mechanical definition of surface tension by Young as a starting point. Three of them (Young, Laplace and Kelvin) are called here the "mechanical paradigm". In contrary it is shown here that there is only one fundamental equation of the thermodynamics of colloid and interface science and all the above (and other) equations of this field follow as its derivatives...
June 2018: Advances in Colloid and Interface Science
https://www.readbyqxmd.com/read/29705026/current-status-and-future-developments-in-preparation-and-application-of-nonspherical-polymer-particles
#18
REVIEW
Bing Yu, Hailin Cong, Qiaohong Peng, Chuantao Gu, Qi Tang, Xiaodan Xu, Chao Tian, Feng Zhai
Nonspherical polymer particles (NPPs) are nano/micro-particulates of macromolecules that are anisotropic in shape, and can be designed anisotropic in chemistry. Due to shape and surface anisotropies, NPPs bear many unique structures and fascinating properties which are distinctly different from those of spherical polymer particles (SPPs). In recent years, the research on NPPs has surprisingly blossomed in recent years, and many practical materials based on NPPs with potential applications in photonic device, material science and biomedical engineering have been generated...
June 2018: Advances in Colloid and Interface Science
https://www.readbyqxmd.com/read/29703593/ball-milling-of-eggshell-waste-as-a-green-and-sustainable-approach-a-review
#19
REVIEW
Matej Baláž
Eggshell waste belongs to the most abundant natural waste in nature and is created in huge amounts by everyday consumption of eggs. The majority of this material is being discarded, despite the fact that it has multidisciplinary applications. In this review, the possibility of utilizing the method of ball milling to further broaden the application potential of this material is discussed. The particular application fields include the formation of nanophases, bioceramics synthesis, formation of composites and preparation of material with increased sorption ability...
June 2018: Advances in Colloid and Interface Science
https://www.readbyqxmd.com/read/29685575/interactions-between-surfactants-and-the-skin-theory-and-practice
#20
REVIEW
Artur Seweryn
One of the primary causes of skin irritation is the use of body wash cosmetics and household chemicals, since they are in direct contact with the skin, and they are widely available and frequently used. The main ingredients of products of this type are surfactants, which may have diverse effects on the skin. The skin irritation potential of surfactants is determined by their chemical and physical properties resulting from their structure, and specific interactions with the skin. Surfactants are capable of interacting both with proteins and lipids in the stratum corneum...
June 2018: Advances in Colloid and Interface Science
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