Rheological Studies of Brazilian Clays in Water-Alcohol Suspensions

Abstract:

In this paper, the rheological behaviors of dispersions of two types of clays a kaolin and a smectitic clay from Paraíba State, Northeastern Brazil, were investigated. Both clays are mainly employed by ceramics industries in the Southern States of São Paulo and Santa Catarina. Viscosity measurements of dispersions in water and three types of alcohols (methanol, ethanol, and propanol) were carried out in a concentric cylinder geometry viscometer. The concentration of the dispersions was 20 wt.% of clay in water-alcohol suspensions containing up to 75 wt.% of each one of the three alcohols. The results are compared and discussed.

References

[1] W.M. Carty and U. Senapati: J. Am. Ceram. Soc. Vol 81 (1998), p.3.

[2] P. Souza Santos. Tecnologia de Argilas, 2ª Ed. (Editora Edgard Blücher, São Paulo, 1975).

[3] H. Van Olphen. An Introduction to Clay Colloid Chemistry, 2nd Edition (John Wiley & Sons, 1977).

[4] T. Permien and G. Lagaly: Clay Minerals Vol. 29 (1994), p.751.

[5] T. Permien and G. Lagaly: Clay Minerals Vol. 29 (1994), p.761.

[6] T. Permien and G. Lagaly: Colloid and Polymer Science Vol. 272 (1994), p.1306.

[7] T. Permien and G. Lagaly: Applied Clay Science Vol. 9 (1994), p.251.

[8] T. Permien and G. Lagaly: Clay and Clay Minerals Vol. 43 (1995), p.229.