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Please use this identifier to cite or link to this item: http://hdl.handle.net/10481/29098

Title: Electroacoustic characterization of bidisperse suspensions
Authors: Jiménez Olivares, María Luisa
Arroyo Roldán, Francisco J.
Ahualli, Silvia
Rica Alarcón, Raúl
Delgado, Ángel V.
Issue Date: 2007
Abstract: Electroacoustic techniques are promising tools for the size determination and electrokinetic characterization of concentrated colloidal suspensions. When particles are not homogeneous in size and/or density, the dynamic mobility obtained is a kind of average of the mobilities of every particle. In this paper, we try to discern which averaging procedure provides a better description of the dynamic mobility of bidisperse suspensions consisting of a mixture of two very different types of particles. The results show that the amplitude of the sound wave induced by an applied ac field (electrokinetic sonic amplitude) is not just the sum of the amplitudes of the waves generated by every particle but has a larger contribution from the larger particles, although the small size entities considerably influence the behaviour of the latter because of their interference in the fluxes of the fluid and ions around them.
Sponsorship: Financial support to this work by MEC (Spain) (Projects FIS2005-06860-C02-01, 02) and Junta de Andalucía (Spain) (Projects FQM410) is gratefully acknowledged.
Publisher: Croatian Chemical Society
Keywords: Electrokinetics
Polydisperse suspensions
URI: http://hdl.handle.net/10481/29098
ISSN: 0011-1643
Rights : Creative Commons Attribution-NonCommercial-NoDerivs 3.0 License
Citation: Jiménez, M.L.; et al. Electroacoustic characterization of bidisperse suspensions. Croatica Chemica Acta, 80(3-4): 453-459 (2007). [http://hdl.handle.net/10481/29098]
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