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Quantification of Colloidal Filtration of Polystyrene Micro-Particles on Glass Substrate Using a Microfluidic Device

Quantification of Colloidal Filtration of Polystyrene Micro-Particles on Glass Substrate Using a Microfluidic Device

Jianfeng Sun, Nil Tandogan, April Z Gu, Sinan Müftü, Edgar D Goluch, Kai-Tak Wan

Colloids Surf B Biointerfaces. 2018 May 1;165:381-387.

PMID: 29529580

Abstract:

A microfluidic device was designed to investigate filtration of particles in an electrolyte in the presence of liquid flow. Polystyrene spheres in potassium chloride solution at concentrations of 3-100 mM were allowed to settle and adhere to a glass substrate. A particle free solution at the same concentration was then flushed through the microfluidic channel at 0.03-4.0 mL/h. As the hydrodynamic drag on the adhered particles exceeded the intersurface interaction with the substrate, "pull-off" occurred and the particles detached. Filtration efficiency, α, was shown to a function of both ionic concentration of the liquid medium and flow speed, consistent with a phenomenological model based on the classical DLVO theory. The results elucidates the underlying physics of filtration.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
LS78102	Micro particles based on polystyrene			Price

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