Use of ultrasound attenuation spectroscopy to determine the size distribution of clay Tactoids in aqueous suspensions.

Ali, Samim; Bandyopadhyay, Ranjini

Please use this identifier to cite or link to this item: http://hdl.handle.net/2289/5931

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DC Field	Value	Language
dc.contributor.author	Ali, Samim	-
dc.contributor.author	Bandyopadhyay, Ranjini	-
dc.date.accessioned	2014-07-24T14:22:31Z	-
dc.date.available	2014-07-24T14:22:31Z	-
dc.date.issued	2013-10-15	-
dc.identifier.citation	Langmuir, 2013, Vol. 29, p 12663	en
dc.identifier.issn	0743-7463	-
dc.identifier.issn	1520-5827 (Online)	-
dc.identifier.uri	http://hdl.handle.net/2289/5931	-
dc.description	Restricted Access.	en
dc.description.abstract	The dispersion processes of aqueous samples of clay are studied using ultrasound attenuation spectroscopy. The attenuation spectra that are acquired in the frequency range 10–100 MHz are used to determine the particle size distributions (PSDs) for different concentrations and ages of the clay suspensions. Our analysis, using equivalent spherical diameter (ESD) for circular discs under Stokes drag in samples of concentrations greater than 1.5% w/v, shows that a substantial fraction of the aggregates in suspension are actually tactoids that are composed of more than one platelet. This is in contrast to the general belief that clay disperses into individual platelets in the concentration range where their suspensions exhibit glassy behavior. We conclude that the incomplete fragmentation of the clay tactoids arises from the rapid enhancement of the intertactoid Coulombic repulsion.	en
dc.language.iso	en	en
dc.publisher	American Chemical Society	en
dc.relation.uri	http://arxiv.org/abs/1406.7076	en
dc.relation.uri	http://dx.doi.org/10.1021/la402478h	en
dc.rights	2013 American Chemical Society	en
dc.title	Use of ultrasound attenuation spectroscopy to determine the size distribution of clay Tactoids in aqueous suspensions.	en
dc.type	Article	en
Appears in Collections:	Research Papers (SCM)

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