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Characterization of Sol-Clay Composites by Small-Angle Neutron Scattering

Published online by Cambridge University Press:  21 February 2011

Ahmad Moini ,
Thomas J. Pinnavaia  and
P. Thiyagarajan
Ahmad Moini
Affiliation:
Department of Chemistry and Center for Fundamental Materials Research, Michigan State University, East Lansing, MI 48824
Thomas J. Pinnavaia
Affiliation:
Department of Chemistry and Center for Fundamental Materials Research, Michigan State University, East Lansing, MI 48824
P. Thiyagarajan
Affiliation:
IPNS Division, Argonne National Laboratory, Argonne, IL 60439
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Abstract

Silica-clay composites were prepared by reacting a 40 Å silica sol with aqueous clay suspensions. The clays which were studied included Na+-montmorillonite, fluorohectorite, and the synthetic clay Laponite. The aggregation mechanism of the sol particles and the degree of dispersion of the clay layers were monitored by small-angle neutron scattering. The data for powdered silica-montmorillonite products showed the presence of highly dispersed clay platelets and spherical sol particles. The results suggest that the interaction between these two components inhibits the sol aggregation process. Studies on the products prepared from other types of clays, however, showed that this interaction is highly dependent on the morphology and charge density of the clay platelets.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 166: Symposium J – Neutron Scattering for Materials Science , 1989 , 391
Copyright
Copyright © Materials Research Society 1990

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References

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