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Advances in Colloid and Interface Science

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https://www.readbyqxmd.com/read/30195460/modelling-cavitation-during-drop-impact-on-solid-surfaces
#1
REVIEW
Nikolaos Kyriazis, Phoevos Koukouvinis, Manolis Gavaises
The impact of liquid droplets on solid surfaces at conditions inducing cavitation inside their volume has rarely been addressed in the literature. A review is conducted on relevant studies, aiming to highlight the differences from non-cavitating impact cases. Focus is placed on the numerical models suitable for the simulation of droplet impact at such conditions. Further insight is given from the development of a purpose-built compressible two-phase flow solver that incorporates a phase-change model suitable for cavitation formation and collapse; thermodynamic closure is based on a barotropic Equation of State (EoS) representing the density and speed of sound of the co-existing liquid, gas and vapour phases as well as liquid-vapour mixture...
August 25, 2018: Advances in Colloid and Interface Science
https://www.readbyqxmd.com/read/30177215/lipid-nanocarriers-for-the-loading-of-polyphenols-a-comprehensive-review
#2
REVIEW
S Pimentel-Moral, M C Teixeira, A R Fernandes, D Arráez-Román, A Martínez-Férez, A Segura-Carretero, E B Souto
Polyphenols are secondary metabolites found in all vascular plants and constitute a large group of at least 10,000 unique compounds. Particular attention is currently being paid to polyphenols attributed to their beneficial effects in the protection and prevention of several diseases. While their use in food, pharmaceutical and cosmetic industries is largely documented, several environmental conditions (e.g. light, temperature or oxygen) may affect the physicochemical stability of polyphenols, compromising their bioactivity in vivo...
August 25, 2018: Advances in Colloid and Interface Science
https://www.readbyqxmd.com/read/30177214/recent-and-prominent-examples-of-nano-and-microarchitectures-as-hemoglobin-based-oxygen-carriers
#3
REVIEW
Michelle M T Jansman, Leticia Hosta-Rigau
Blood transfusions, which usually consist in the administration of isolated red blood cells (RBCs), are crucial in traumatic injuries, pre-surgical conditions and anemias. Although RBCs transfusion from donors is a safe procedure, donor RBCs can only be stored for a maximum of 42 days under refrigerated conditions and, therefore, stockpiles of RBCs for use in acute disasters do not exist. With a worldwide shortage of donor blood that is expected to increase over time, the creation of oxygen-carriers with long storage life and compatibility without typing and cross-matching, persists as one of the foremost important challenges in biomedicine...
August 24, 2018: Advances in Colloid and Interface Science
https://www.readbyqxmd.com/read/30170690/mechanisms-performance-optimization-and-new-developments-in-demulsification-processes-for-oil-and-gas-applications
#4
REVIEW
Zlata Grenoble, Siwar Trabelsi
The present review discusses new developments and optimization of demulsification processes in oil and gas applications, and highlights the critical parameters. Discussed are the primary mechanisms of demulsification, as well as the strategies for developing optimum demulsifiers. Demulsification mechanisms are presented in the context of emulsion stability principles which are equally applicable to the destabilization of crude oil-water emulsions. The present paper is a concise overview of the various surfactant classes and their structure-activity relationship...
August 17, 2018: Advances in Colloid and Interface Science
https://www.readbyqxmd.com/read/30170689/recent-advances-in-polymerizations-in-dispersed-media
#5
REVIEW
Ratchapol Jenjob, Farzad Seidi, Daniel Crespy
Advances in chemistry heterophase polymerizations reflect new developments in polymer chemistry. Although some few polymerization reactions cannot be performed in dispersed media, new polymerization reactions can still benefit from advantages of heterophase reactions, which are fast kinetics due to high local concentration of reagents and advantageous heat exchange. We describe here advances in heterophase polymerizations, with a focus on miniemulsion polymerization, which are mainly driven by academic interest for biomedicine and energy science...
August 9, 2018: Advances in Colloid and Interface Science
https://www.readbyqxmd.com/read/30119842/engineering-intelligent-particle-lipid-composites-that-control-lipase-mediated-digestion
#6
REVIEW
Paul Joyce, Hanna Gustafsson, Clive A Prestidge
Nanostructured particle-lipid composites have emerged as state-of-the-art carrier systems for poorly water-soluble bioactive molecules due to their ability to control and enhance the lipase-mediated hydrolysis of encapsulated triglycerides, leading to a subsequent improvement in the solubilisation and absorption of encapsulated species. The first generation of particle-lipid composites (i.e. silica-lipid hybrid (SLH) microparticles) were designed and fabricated by spray drying a silica nanoparticle-stabilised Pickering emulsion, to create a novel three-dimensional architecture, whereby lipid droplets were encapsulated within a porous matrix support...
August 6, 2018: Advances in Colloid and Interface Science
https://www.readbyqxmd.com/read/30060946/evaluation-of-particle-charging-in-non-aqueous-suspensions
#7
REVIEW
Jarl B Rosenholm
Factors influencing the sign and size of effective surface (zeta) potential in suspensions of very low dielectric constants are evaluated. For non-aqueous suspensions it was found that Gutmann's donor number (DN = negative Lewis type molar acid-base adduct formation enthalpy) was successfully related to zeta potential changes, similarly as pH is optimal for aqueous suspensions. Negative molar proton dissociation enthalpy (Brϕnsted type HD number), negative hydrogen bond enthalpy (HB number), logarithmic hydrogen bond equilibrium constant (molar Gibbs free energy), standard reduction potential of solvated protons (Eo (HL + /H2 )), electrolytic dissociation potential of water (Eo (H2 O/H2 ,O2 )) and electron exchange Fermi potentials could equally well be related to zeta potential changes...
September 2018: Advances in Colloid and Interface Science
https://www.readbyqxmd.com/read/30056938/orientation-phase-transitions-of-undissociated-n-decanoic-acid-at-the-air-solution-interface-revealed-by-surface-pressure-and-electric-potential
#8
REVIEW
Wanda Barzyk, Klaus Lunkenheimer, Andrzej Pomianowski
The surface pressure (Π) and electric surface potential (ΔV) vs. concentration (c) isotherms of n-decanoic acid (DA) in 1 × 10-3  mol/dm3 HCl were measured at the air/solution interface - the Π with a du Noüy ring, the ΔV with the vibrating plate (named also the dynamic condenser) method. The DA solutions fulfilled criterion of surface-chemical purity. The complementary Π-c and ΔV-c isotherms were jointly evaluated to obtain dependence of quotient of the effective dipole moment to the interface's permittivity, μ⊥ /εs , as a function of chosen adsorption ordinates such as the bulk concentration, c, partial molar area, A, and surface molar fraction of DA, XDA s ...
September 2018: Advances in Colloid and Interface Science
https://www.readbyqxmd.com/read/30032930/nitrogen-doped-graphene-and-graphene-quantum-dots-a-review-onsynthesis-and-applications-in-energy-sensors-and-environment
#9
REVIEW
Manpreet Kaur, Manmeet Kaur, Virender K Sharma
Doping of nitrogen is a promising strategy to modulate chemical, electronic, and structural functionalities of graphene (G)and graphene quantum dots (GQDs) for their outstanding properties in energy and environmental applications.This paper reviews various synthesis approaches of nitrogen-doped graphene (N-G) and nitrogen-doped graphene quantum dots (N-GQDs).;Thermal, ultrasonic, solvothermal, hydrothermal, and electron-beam methods have been applied to synthesize N-G and N-GQDs.These nitrogen-doped carbon materials are characterized to obtain their structural configurations in order to achieve better performance in their applications compared to only either graphene or graphene quantum dots...
September 2018: Advances in Colloid and Interface Science
https://www.readbyqxmd.com/read/30075852/developments-in-support-materials-for-immobilization-of-oxidoreductases-a-comprehensive-review
#10
REVIEW
Jakub Zdarta, Anne S Meyer, Teofil Jesionowski, Manuel Pinelo
Bioremediation, a biologically mediated transformation or degradation of persistent chemicals into nonhazardous or less-hazardous substances, has been recognized as a key strategy to control levels of pollutants in water and soils. The use of enzymes, notably oxidoreductases such as laccases, tyrosinases, various oxygenases, aromatic dioxygenases, and different peroxidases (all of EC class 1) is receiving significant research attention in this regard. It should be stated that immobilization is emphasized as a powerful tool for enhancement of enzyme activity and stability as well as for protection of the enzyme proteins against negative effects of harsh reaction conditions...
August 2018: Advances in Colloid and Interface Science
https://www.readbyqxmd.com/read/30072030/flexible-electrochromic-materials-based-on-cnt-pda-hybrids
#11
REVIEW
Reinack Varghese Hansen, Jinglei Yang, Lianxi Zheng
Materials that change color in response to external stimuli can cater to diverse applications from sensing to art. If made flexible, stretchable and weavable, they may even be directly integrated with advanced technologies such as smart textiles. A new class of engineered composite based on polydiacetylene (PDA) functionalized carbon nanotubes (CNT) shows tremendous potential in this regard. While the inherent multi stimuli chromatic response of the polymer (blue to red) is retained, the underlying conducting CNTs invoke electrochromism in PDA...
August 2018: Advances in Colloid and Interface Science
https://www.readbyqxmd.com/read/30056937/mesoscopic-characterization-of-amphiphilic-monoglycerol-monolayers
#12
REVIEW
D Vollhardt
The introduction of the highly-sensitive imaging technique Brewster angle microscopy (BAM) has given rise to new knowledges about the mesoscopic topology and ordering of condensed phase domains formed in the two-phase coexistence region of Langmuir monolayers. Besides fatty acids, monoalkanoylglycerols are the most studied amphiphiles at the air-water interface. In this review, the mesoscopic characterization of amphiphilic monoglycerol monolayers is surveyed to demonstrate the striking effect of the position of the glycerol backbone at which the polar head group is substituted...
August 2018: Advances in Colloid and Interface Science
https://www.readbyqxmd.com/read/30008347/pamam-dendrimer-cell-membrane-interactions
#13
REVIEW
Laura J Fox, Robert M Richardson, Wuge H Briscoe
PAMAM dendrimers have been conjectured for a wide range of biomedical applications due to their tuneable physicochemical properties. However, their application has been hindered by uncertainties in their cytotoxicity, which is influenced by dendrimer generation (i.e. size and surface group density), surface chemistry, and dosage, as well as cell specificity. In this review, biomedical applications of polyamidoamine (PAMAM) dendrimers and some related cytotoxicity studies are first outlined. Alongside these in vitro experiments, lipid membranes such as supported lipid bilayers (SLBs), liposomes, and Langmuir monolayers have been used as cell membrane models to study PAMAM dendrimer-membrane interactions...
July 2018: Advances in Colloid and Interface Science
https://www.readbyqxmd.com/read/29937230/polyphenols-at-interfaces
#14
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...
July 2018: Advances in Colloid and Interface Science
https://www.readbyqxmd.com/read/29934140/wall-slip-for-complex-liquids-phenomenon-and-its-causes
#15
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...
July 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
#16
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...
July 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
#17
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...
July 2018: Advances in Colloid and Interface Science
https://www.readbyqxmd.com/read/29859615/microrheology-advances-in-methods-and-insights
#18
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...
July 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
#19
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
#20
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
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