But depletion flocculation is a very significant effect in real-world formulations, so it's worth trying to understand what is going on so you can avoid the problem. Depletion Flocculation Particle r nm
Get PriceThe system of colloids and depletants in solution is typically modeled by treating the large colloids and small depletants as dissimilarly sized hard spheres. Hard spheres are characterized as non-interacting and impenetrable spheres. These two fundamental properties of hard spheres are described mathematically by the hard-sphere potential. The hard-sphere potential imposes steric constraint around large spheres which in turn gives rise to excluded volume, that is, volume that is unavailable for small s…
Get Price9-2-2016· Depletion Flocculation [email protected] Poly. Loading... Unsubscribe from [email protected] Poly? ... Flocculation and coagulation - floc forming and particle settling - Duration: 3:11.
Get Price15-11-1996· ELSEVIER Depletion flocculation in colloidal dispersions Paul Jenkinsa, Martin Snowden b,* alan Wark Research Institute, University of South Australia, Warrendi Road, The Levels SA 5095, Australia bSchool of Chemical and Life Sciences, University of Greenwich, Woolwich, London SE18 6PF, UK Abstract ADVANCES IN COLLOID AND Advances in Colloid and Interface Science INTERFACE …
Get PriceThis paper shows that low concentrations of β-lactoglobulin fibrils can induce depletion−flocculation in β-lactoglobulin-stabilized oil-in-water emulsions. The minimum required fibril concentration for flocculation was determined experimentally for fibril lengths of about 3 and 0.1 μm. The minimum fibril concentration for flocculation is two orders of magnitude higher for the short ...
Get PriceDepletion flocculation was observed in the emulsions when the nonabsorbed biopolymer concentration exceeded a critical concentration (CFC). The CFC increased with decreasing droplet radius for both biopolymers because the magnitude of the depletion attraction increases with droplet size.
Get PriceDEPENDENCE OF ENDOCYTOSIS CAUSED BY DEPLETION EFFECTS ON THE ASPECT RATIO OF COLLOIDAL PARTICLE. Journal of Biological Systems 2015, 23 (01) , 49-56. DOI: 10.1142/S0218339015500035. Shunxi Ji, John Y. Walz. Depletion forces and flocculation with surfactants, polymers and particles — Synergistic effects.
Get Price5-5-2019· Recently, depletion-induced flocculation has been recognized as a potential approach for purification of nanostructures [34,35].In a colloidal solution of nanoparticles involving micelles or polymers, there is a region around each nanoparticle inaccessible to the small solutes due to steric constraint, namely excluded volume (V E).When nanoparticles get sufficiently close so that their ...
Get PriceThe depletion flocculation is well known in food science, especially in emulsions [29][30] [31] [32]. The assembly that is suggested works as a shielding of PVP molecules by block copolymers. ...
Get PriceFlocculation, in the field of chemistry, is a process in which colloids come out of suspension in the form of floc or flake, either spontaneously or due to the addition of a clarifying agent. The action differs from precipitation in that, prior to flocculation, colloids are merely suspended in a liquid and not actually dissolved in a solution. In the flocculated system, there is no formation of a cake, since all the flocs are in the suspension.
Get PriceDEPENDENCE OF ENDOCYTOSIS CAUSED BY DEPLETION EFFECTS ON THE ASPECT RATIO OF COLLOIDAL PARTICLE. Journal of Biological Systems 2015, 23 (01) , 49-56. DOI: 10.1142/S0218339015500035. Shunxi Ji, John Y. Walz. Depletion forces and flocculation with surfactants, polymers and particles — Synergistic effects.
Get Price26-5-2014· Brief explanation of the depletion interaction between colloidal particles induced in a solution containing nonadsorbing polymers by Remco Tuinier. Find a much deeper treatment of the subject in ...
Get PriceDownload Citation | Depletion Flocculation of Latex Dispersion in Ionic Micellar Systems | The flocculation behavior of anionic and cationic latex dispersions induced by addition of ionic ...
Get PriceViele übersetzte Beispielsätze mit "depletion flocculation" – Deutsch-Englisch Wörterbuch und Suchmaschine für Millionen von Deutsch-Übersetzungen.
Get PriceDepletion flocculation is a well-known instability mechanism that can occur in oil-in-water emulsions when the concentration of non-adsorbed polysaccharide exceeds a certain level. This critical flocculation concentration depends on the molecular characteristics of the polysaccharide molecules, such as their molecular weight and hydrodynamic radius.
Get Price‘Several previous reports have dealt with the experimental and theoretical aspects of depletion aggregation, often termed depletion flocculation, as applied to the general field of colloid chemistry.’
Get PriceMany translated example sentences containing "depletion flocculation" – German-English dictionary and search engine for German translations.
Get PriceDepletion Flocculation of Beverage . Download citation | Depletion Flocculati | The creaming velocity, apparent viscosity, and ultrasonic attenuation spectra (1 to 50 MHz) of 5 wt% n hexadecane oil-in-water emulsions containing different droplet radii (r = 0.15 - 0.7 μm), …
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Get Priceflocculation arises from depletion of non adsorbed surfictant making micelles. This is similar to the well known destabilization of colloids by non-adsorbing polyi-ners [7,11]. The same mechanism was also proposed to account for flocculation of polystyrene latex by surfactant [12]. Depletion interactions arise in a colloidal system of ...
Get PriceDepletion flocculation An entropy-driven phase separation between an droplet-rich region and polysaccharide-rich region Depletion flocculation is directly related to the size of polysaccharide coils The center of mass of large polysaccharide molecules are excluded from the thin region adjacent to the droplets surface, the depletion layer
Get PriceThese data correlate well with the depletion flocculation predicted for the lower concentration and the depletion stabilization predicted for the higher dextran concentration. At dextran (Mw ≈ 500,000) concentrations from 2 to ≈10%, suspensions of normal human erythrocytes flocculate in …
Get PriceThis paper shows that low concentrations of -lactoglobulin fibrils can induce depletion-flocculation in -lactoglobulin-stabilized oil-in-water emulsions. The minimum required fibril concentration for flocculation was determined experimentally for fibril lengths of about 3 and 0.1 m.
Get PriceFlocculation, monitored by turbidity measurements, was observed in the absence of electrolyte at critical polymer concentrations (C*) at 0.4%, 0.02% and 0.3% for HEC, SCMC and SPSS, respectively. The flocculation was reversible to dilution and weak shear forces and was attributed to polymer depletion.
Get PriceFlocculation by depletion and bridging was induced by addition of the polysaccharide carboxy-methylcellulose (CMC) to emulsions that were stabilised by ß …
Get PriceDepletion Flocculation of Beverage . Download citation | Depletion Flocculati | The creaming velocity, apparent viscosity, and ultrasonic attenuation spectra (1 to 50 MHz) of 5 wt% n hexadecane oil-in-water emulsions containing different droplet radii (r = 0.15 - 0.7 μm), …
Get PriceFigure 2.1 A schematic illustrating the depletion flocculation mechanism at the particle scale. The excluded volume, the overlap volume, and the direction of the osmotic pressure (yellow arrows) arising from the polymer (blue curves) are defined. - "On extending depletion flocculation phase behaviour models to partially soluble and aggregating colloids"
Get PriceCalculation of depletion interaction energy showed an increase in inter-droplet attraction with protein concentration and decrease with a reduction in droplet size, making the nanoemulsions more resistant to flocculation than conventional emulsions.
Get Priceflocculation arises from depletion of non adsorbed surfictant making micelles. This is similar to the well known destabilization of colloids by non-adsorbing polyi-ners [7,11]. The same mechanism was also proposed to account for flocculation of polystyrene latex by surfactant [12]. Depletion interactions arise in a colloidal system of ...
Get PriceBridging flocculation, on the other hand, can produce very large flocs but performance can be erratic. This paper focuses on bridging flocculation and presents an evaluation of the causes and solutions to perfor-mance variability. Polymer Adsorption The polymers used in bridging flocculation are normally high molecular weight linear-chain com-
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