期刊
APPLIED PHYSICS LETTERS
卷 105, 期 7, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.4893459
关键词
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资金
- NSF [CBET-1234500]
- CT Space Grant Pro-Sum [649]
- Div Of Chem, Bioeng, Env, & Transp Sys
- Directorate For Engineering [1234500] Funding Source: National Science Foundation
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. (C) 2014 AIP Publishing LLC.
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