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  Depletion Flocculation of Beverage Emulsions by Gum Arabic

  2006-7-20 · Depletion flocculation led to an increase in creaming instability and apparent viscosity of the emulsions. Flocculation could be nondestructively monitored by measuring the decrease in ultrasonic attenuation of the emulsions. These results show that depletion flocculation by gum arabic and modified starch can have an adverse effect on the

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  Depletion flocculation and thermodynamic incompatibility

  In the case of Tween 40 stabilized droplets depletion flocculation led to a complete creaming of the fat globules fat globules Subject Category Miscellaneous see more details while phase separation led to the formation of two polymer-rich phases namely a protein-rich phase at the bottom of the tube and a methylcellulose-rich phase above. In

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  (PDF) Self-Depletion Flocculation of Tetralin Oil-in-Water

  A different depletion flocculation mechanism is necessary.Second the time scale of tens of minutes for the flocculation process to reach a temporary equilibrium is of the same order as has been observed for other aggregation processes such as the flocculation of polystyrene latex particles by modified hydroxyethylcellulose. 21 Third the

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  Extending Depletion Flocculation Phase ERA

  Mixtures of colloids non-adsorbing polymers good solvents are well known to exhibit multiphase behaviors that are driven by the depletion flocculation mechanism where one phase designated a colloid gas is largely comprised of polymer and solvent while the other phase designated a colloid (liquid or solid) comprises largely solvent

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  Depletion Stabilization in Nanoparticle-Polymer

  As PVA concentration increases the microstructure evolves from bridging flocculation steric stabilization depletion flocculation to depletion stabilization. To our surprise when depletion stabilization occurs the suspension shows the stabilization at the cluster length scale while maintaining fractal aggregates at the particle length scale.

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  Dextran-induced depletion flocculation in oil-water

  The sucrose concentration affected neither the polysaccharide concentration above which depletion flocculation occurred nor the elastic modulus and maximum linear strain of the emulsion gels formed. Furthermore only a minor change in size of dextran molecules was measured over the range of sucrose concentrations studied.

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  THE INTERACTION BETWEEN DEPLETION FLOCCULATION

  2020-7-31 · GLC at equilibrium are driven by depletion flocculation (a surface phenomenon). This work focuses on the interaction between these two phenomenadepletion flocculation and molecular liquid-liquid phase behavior based on the behavior of polystyrene cyclohexane nano silica particles.

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  Concentrated sterically stabilized dispersions and their

  2007-12-3 · The flocculation was followed using rheological measurements. As a result of the presence of depletion layers flocculation became significant above a critical volume fraction of free polymer ϕ p . The results were analysed using the available theories on depletion flocculation and a comparison was made between the free energy of depletion

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  Depletion Flocculation Induced by Synergistic Effects of

  2013-12-13 · Comparing the calculated pair potentials to the observed flocculation results revealed that flocculation occurred once the magnitude of the secondary energy well formed by the attractive depletion force exceeded 5 kT.

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  Clustering of Binary Colloidal Suspensions Theory

  2011-1-19 · c (depletion flocculation) and the floccula- tion rate of the colloidal particles peaked at some higher polymeric density c > c . Further increase in the polymeric density from that point only decreased the flocculation rate and the suspension appeared stabilized again

  Depletion Flocculation by Particle Crowding

  2018-11-14 · Depletion Flocculation SCC SW CHAPTER 1118 Polymers in Cosmetics 413. Depletion Stabilization SCC SW CHAPTER 1118 Polymers in Cosmetics 414. SCC SW CHAPTER 1118 Polymers in Cosmetics Depletion Stabilization •Two particles in solution will be attracted to each other by London Dispersion Forces

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  Depletion Flocculation Induced by Synergistic Effects of

  2013-12-13 · The depletion flocculation of stable suspensions of charged microparticles (1.2 μm diameter polystyrene) by mixtures of silica nanoparticles (7 nm) and poly (acrylic) acid (PAA Mn = 24 500) was studied. The experiments revealed a very clear critical flocculation concentration of PAA that was lowered by the addition of the silica nanoparticles.

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  (PDF) Depletion Flocculation in Colloidal Dispersions

  The 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.

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  Depletion stabilization and depletion flocculation

  1980-6-1 · An approximate theory of depletion stabilization and depletion flocculation (i.e. stabilization and flocculation of colloidal particles by polymers in free solution) is presented. This is based upon the rotational isomeric state-Monte Carlo procedures for calculating the conformation of macromolecules between two particles and the Flory-Huggins theory of polymer solutions.

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  Influence of oat components on lipid digestion using an in

  Depletion 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

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  Continuum percolation and depletion flocculationNASA/ADS

  Using Brownian dynamics simulations we investigate continuum percolation in a system of colloid particles aggregating due to depletion flocculation. For all values of aggregating potential there is a lower threshold volume fraction of colloid particles at which a percolating cluster appears. This threshold defines a percolation "phase" boundary that crosses the phase boundary between the

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  Depletion flocculation of caseinate-stabilised emulsions

  2004-5-4 · The depletion flocculation theory for soft (steric polymer-coated) spheres has been investigated by Vincent and co-workers and also latterly by Seebergh and Berg . In contrast to hard spheres the depletion effect in soft (hairy) spheres is much reduced due to the interpenetration of the free non-adsorbed polymer with the anchored steric layer.

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  Clustering of Binary Colloidal Suspensions Theory

  2011-1-19 · c (depletion flocculation) and the floccula- tion rate of the colloidal particles peaked at some higher polymeric density c > c . Further increase in the polymeric density from that point only decreased the flocculation rate and the suspension appeared stabilized again

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  Depletion Flocculation of Nonaqueous Dispersions

  1996-6-26 · Depletion flocculation induced in dispersions of hydrophobic silica particles in nonpolar media by the presence of binary mixtures of nonadsorbing polymers has been investigated both experimentally and theoretically.

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  Extending Depletion Flocculation Phase ERA

  Mixtures of colloids non-adsorbing polymers good solvents are well known to exhibit multiphase behaviors that are driven by the depletion flocculation mechanism where one phase designated a colloid gas is largely comprised of polymer and solvent while the other phase designated a colloid (liquid or solid) comprises largely solvent

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  Influence of oat components on lipid digestion using an in

  Depletion 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

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  Continuum percolation and depletion flocculation The

  1998-7-8 · Using Brownian dynamics simulations we investigate continuum percolation in a system of colloid particles aggregating due to depletion flocculation. For all values of aggregating potential there

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  Rheological investigation of depletion flocculation of

  The flocculation of a concentrated polystyrene latex suspension (volume fraction φ = 0.3) containing grafted poly (ethylene oxide) chains by "free" (non-adsorbing) poly (ethylene oxide) (PEO) was investigated using rheological measurements. Three techniques were used namely steady-state shear stress-shear rate measurements shear modulus and oscillatory measurements.

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  Dextran-induced depletion flocculation in oil-water

  The sucrose concentration affected neither the polysaccharide concentration above which depletion flocculation occurred nor the elastic modulus and maximum linear strain of the emulsion gels formed. Furthermore only a minor change in size of dextran molecules was measured over the range of sucrose concentrations studied.

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  Depletion flocculation of polystyrene latices by water

  Flocculation 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.

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  Depletion flocculation in colloidal dispersions Semantic

  Depletion flocculation in colloidal dispersions. Abstract The destabilisation of colloidal dispersions by free non-adsorbing polymer molecules in solution is reviewed from both a theoretical and experimental perspective. Consideration is given to the behaviour of polymers in solution in relation to the theories proposed by Flory de Gennes

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  Concentrated sterically stabilized dispersions and their

  2007-12-3 · The flocculation was followed using rheological measurements. As a result of the presence of depletion layers flocculation became significant above a critical volume fraction of free polymer ϕ p . The results were analysed using the available theories on depletion flocculation and a comparison was made between the free energy of depletion

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  Depletion−Flocculation in Oil-in-Water Emulsions Using

  2019-5-26 · This 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.

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  Depletion Flocculation Practical Solubility Science

  Frustratingly if we add a little too much polymer we can de-stabilize the system via a non-intuitive effect called Depletion Flocculation. To get a feel for the effect play with the radius of the particles the radius ("radius of gyration") of the polymer its concentration and MWt. The

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