Electroacoustic characterization of bidisperse suspensions
Metadatos
Mostrar el registro completo del ítemAutor
Jiménez Olivares, María Luisa; Arroyo Roldán, Francisco J.; Ahualli Yapur, Silvia Alejandra; Rica Alarcón, Raúl Alberto; Delgado Mora, Ángel VicenteEditorial
Croatian Chemical Society
Materia
Electrokinetics ESA Polydisperse suspensions Electroacoustics
Fecha
2007Referencia bibliográfica
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]
Patrocinador
Financial support to this work by MEC (Spain) (Projects FIS2005-06860-C02-01, 02) and Junta de Andalucía (Spain) (Projects FQM410) is gratefully acknowledged.Resumen
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.