Dynamic Light Scattering Study of Concentrated W/O Microemulsions

Bellocq, A. M.; Fourche, Georges; Chabrat, P.; Letamendia, L.; Rouch, J.; Vaucamps, C.

doi:10.1080/713820182

Cited by 25 publications

(13 citation statements)

References 11 publications

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“…A number of research has been carried out on the motion of droplets inside an ME. [14][15][16][17][18] One of the interesting topics is to study the motion of droplets at the mixture of an ME with a polymer. [19][20][21][22] Usually several Brownian motions can be found in the mixture of an ME with a polymer.…”

Section: Introductionmentioning

confidence: 99%

Length scale of polyisopirene and dynamic light scattering and structure of sodium-2-diethylhexyl sulfosuccinate/water/decane

Sharifi

Delgosha

2015

Physics and Chemistry of Liquids

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The mixture of polyisopirene (PI) and sodium-2-diethylhexyl sulfosuccinate /decane/ water microemulsion (ME) at AOT to water molar ratio (X = 30) and droplet mass fraction (m f,drop = 0.08) was studied with dynamic light scattering and small-angle Xray scattering (SAXS). The light scattering was used to obtain the diffusion coefficient of Brownian motion of the nano-droplets at different polymer concentrations and molecular weights (1000 and 4700) in the ME. The dynamics of the nano-droplets decreased with the increase of molecular weight (from 1000 to 4700) and concentration (from 0.01 to 0.09) of PI. The study of the structure by SAXS showed that with increase of PI (MW = 1000) mass fraction from 0.01 to 0.09 at ME, the size of the droplets changes from 4.5 to 4.3 nm and with increase of PI (MW = 4700) concentration at ME, the size of droplets changes from 4.8 to 4.4 nm. The size ratio of droplets to polymer decreased with increase of concentration and molecular weight of polymer and also the interaction between the droplets increased with increase of polymer concentration.

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Section: Introductionmentioning

confidence: 99%

Length scale of polyisopirene and dynamic light scattering and structure of sodium-2-diethylhexyl sulfosuccinate/water/decane

Sharifi

Delgosha

2015

Physics and Chemistry of Liquids

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“…It was found [2] that Doff varies appreciably with the wavenumber q, in particular it exhibits a minimum at a q value q,,,-2 . 2 x 10 5 cm -1 .…”

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confidence: 97%

“…Then, the spectroscopic data can no longer be analysed in terms of simple Brownian diffusion . Systems of microemulsions studied recently by intensity correlation spectroscopy [2] fall into this category . Measurements were carried out on the system Potassium oleate-hexanol-dodecane-water in the vicinity of the transition to the gel phase .…”

mentioning

confidence: 99%

“…The figure shows the reduced line width D*(q)=w 112 (q) (D0g 2) -1 , where W1 12(q) is the half-width at half-height of the self-correlation function, the single particle dynamic structure factor S,(q, W), and Da =D(q=0) is the diffusion coefficient at zero wavenumber . Also shown is the reduced effective diffusion coefficient D*(q)=Deff(q)/Do for the microemulsion system obtained from the intermediate scattering functions measured in the short time domain [2] . In scaling the wavenumber, the quantity 1= (nna2) -1 is used .…”

mentioning

confidence: 99%

“…Lorentz model for overlapping hard spheres[5] (-) ; microemulsion Potassium oleate-hexanol-dodecane-water[2] (9 with error bars), n*=0 . 41 .…”

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confidence: 99%

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Correlated Dynamics and Light Scattering in Microemulsions

Boon

Yip

1982

Optica Acta: International Journal of Optics

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Time‐dependent solubilization of IgG in AOT‐brine‐isooctane microemulsions: Role of cluster formation

Gerhardt

Dungan

2002

Biotech & Bioengineering

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The stability and structure of protein-containing water-in-oil (w/o) microemulsions were investigated by using the large protein immunoglobulin G (IgG, MW 155,000) in a mixture comprised of brine, sulfosuccinic acid bis [2-ethylhexyl]ester (sodium salt), and isooctane. We explored factors affecting the initial uptake of IgG into the w/o microemulsion and its subsequent release to a solid (precipitate) phase, and the kinetics of the latter process. Influences of such parameters as pH, ionic strength, and protein concentration on the solubilization and precipitation of bovine IgG in the organic phase are described. The structure and dynamics in microemulsions containing bovine IgG were probed by using dynamic light scattering, and it was found that the presence of IgG in the microemulsion induced strong attractive forces between the droplets. Based on results obtained by using these various experimental approaches, a model for protein solubilization and release is proposed. In this model, we propose the formation of clusters within which bovine IgG resides and which substantially slow the kinetics of protein release from the droplets to the precipitate phase.

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Dynamic Light Scattering Study of Concentrated W/O Microemulsions

Cited by 25 publications

References 11 publications

Length scale of polyisopirene and dynamic light scattering and structure of sodium-2-diethylhexyl sulfosuccinate/water/decane

Length scale of polyisopirene and dynamic light scattering and structure of sodium-2-diethylhexyl sulfosuccinate/water/decane

Correlated Dynamics and Light Scattering in Microemulsions

Time‐dependent solubilization of IgG in AOT‐brine‐isooctane microemulsions: Role of cluster formation

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