Clogging by sieving in microchannels: Application to the detection of contaminants in colloidal suspensions
We report on a microfluidic method that allows measurement of a small concentration of large contaminants in suspensions of solid micrometer-scale particles. To perform the measurement, we flow the colloidal suspension through a series of constrictions, i.e., a microchannel of varying cross-section....
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| Veröffentlicht in: | Applied physics letters 2014-08, Vol.105 (7) |
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| container_title | Applied physics letters |
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| creator | Sauret, Alban Barney, Erin C. Perro, Adeline Villermaux, Emmanuel Stone, Howard A. Dressaire, Emilie |
| description | We report on a microfluidic method that allows measurement of a small concentration of large contaminants in suspensions of solid micrometer-scale particles. To perform the measurement, we flow the colloidal suspension through a series of constrictions, i.e., a microchannel of varying cross-section. We show and quantify the role of large contaminants in the formation of clogs at a constriction and the growth of the resulting filter cake. By measuring the time interval between two clogging events in an array of parallel microchannels, we are able to estimate the concentration of contaminants whose size is selected by the geometry of the microfluidic device. This technique for characterizing colloidal suspensions offers a versatile and rapid tool to explore the role of contaminants on the properties of the suspensions. |
| doi_str_mv | 10.1063/1.4893459 |
| format | Article |
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| ispartof | Applied physics letters, 2014-08, Vol.105 (7) |
| issn | 0003-6951 1077-3118 |
| language | eng |
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| source | AIP Journals Complete; Alma/SFX Local Collection |
| subjects | Applied physics Colloids Contaminants Filter cake Fluid Dynamics Microchannels Physics |
| title | Clogging by sieving in microchannels: Application to the detection of contaminants in colloidal suspensions |
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