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The Formation of Stable Sols from Laponite, A Synthetic Hectorite-Like Clay

Published online by Cambridge University Press:  09 July 2018

B. S. Neumann  and
K. G. Sansom
B. S. Neumann
Affiliation:
Laporte Industries Ltd, Redhill, Surrey
K. G. Sansom
Affiliation:
Laporte Industries Ltd, Redhill, Surrey
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Abstract

The effects of simultaneous additions of electrolyte and peptiser to dispersions of the synthetic hectorite-like clay, Laponite, have been studied. It has been unexpectedly discovered that whereas many cations cause gelling and flocculation of the dispersions as expected by colloid chemical theory, some cations actually stabilize the sols obtained with peptiser. A relationship has been found between the effectiveness of the cations in increasing sol stability and their size and charge.

The effects of time, temperature and peptiser concentration have also been examined, and explanations are offered for the phenomena observed.

Type
Research Article
Information
Clay Minerals , Volume 8 , Issue 4 , December 1970 , pp. 389 - 404
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1970

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References

Van Olphen, H. (1963) An Introduction to Clay Colloid Chemistry, Interscience.CrossRefGoogle Scholar
Pauling, L. (1960) The Nature of the Chemical Bond, Cornell University Press Google Scholar