Effect of a Zwitterionic Copolymer on the Rheological Behavior of Aqueous α-Al2O3 Suspensions

Article Preview

Abstract:

A zwitterionic copolymer has been synthesized and a common optimum concentration of dispersant for the stabilized Al2O3 suspensions is found at 0.04wt%, which represents the adsorption saturation limit of polyelectrolytes at Al2O3 –water interface at pH = 10. Based on the results from rheological measurements, involving the effect of dispersant concentration, a stable broader dispersant concentration range of 0.4wt% ~ 0.22wt% is observed for suspensions with solids loading ≤ 50vol%, a stable broader pH range of 7.0 ~ 11.2 for suspension with solids loading ≤ 50vol%, and a stable pH range of 1.2 ~ 2.0 for suspensions with solids loading ≤ 40vol%.

You might also be interested in these eBooks

Info:

Periodical:

Pages:

386-390

Citation:

Online since:

December 2012

Export:

Price:

Permissions CCC:

Permissions PLS:

Сopyright:

© 2013 Trans Tech Publications Ltd. All Rights Reserved

Share:

Citation:

[1] J. A. Lewis. Colloidal Processing of Ceramics.J. Am. Ceram. Soc. 2000; 83: 2341–59.

Google Scholar

[2] M. Montero, T. Molina, M. Szafran, R. Moreno and M. I. Nieto. Alumina porous nanomaterials obtained by colloidalprocessing using d-fructose as dispersant and porosity promoter. Ceram. Int. 2012; 38: 2779–84.

DOI: 10.1016/j.ceramint.2011.11.048

Google Scholar

[3] A. Natoli, A. Cabeza, Á. G. De La Torre, M. A. G. Aranda and I. Santacruz. Colloidal Processing of Macroporous TiO2 Materials for Photocatalytic Water Treatment. J. Am. Ceram. Soc. 2012: 95: 502–08.

DOI: 10.1111/j.1551-2916.2011.04883.x

Google Scholar

[4] D. Guo,K. Cai L.T. Li, and Z.L. Gui. Application of Gelcasting to the Fabrication of Piezoelectric Ceramic Parts, J. Eur. Ceram. 2003; 23: 1131-37.

DOI: 10.1016/s0955-2219(02)00279-0

Google Scholar

[5] R. Gilissen J.P. Erauw, and A. Smolders et al., Gelcasting, a near net shape technique, Mater Design, 2000; 21: 251-57.

DOI: 10.1016/s0261-3069(99)00075-8

Google Scholar

[6] J. Wang and L. Gao. Surface and electrokinetic properties of Y-TZP suspensions stabilized by polyelectrolytes, Ceram. Int., 2000; 26: 187-91.

DOI: 10.1016/s0272-8842(99)00038-3

Google Scholar

[7] Y. Hirata,S. Tabata, and J. Ideue. Interactions in the Silicon Carbide–Polyacrylic Acid–Yttrium Ion System, J. Am. Ceram. Soc, 2003; 86: 5.

DOI: 10.1111/j.1151-2916.2003.tb03269.x

Google Scholar

[8] J. Cesarano Ⅲ and I.A. Aksay. Processing of Highly Concentrated Aqueous α-Alumina Suspension Stabilized with Polyelectrolytes. J. Am. Ceram. Soc. 1988; 71: 1062-67.

DOI: 10.1111/j.1151-2916.1988.tb05792.x

Google Scholar

[9] J. Cesarano Ⅲ, I.A. Aksay, and A. Bleier. Stability of Aqueous α-Al2O3 Suspension with Poly(Methacrylic Acid) Polyelectrolyte. J. Am. Ceram. Soc. 1988; 71: 250-55.

DOI: 10.1111/j.1151-2916.1988.tb05855.x

Google Scholar

[10] C.G. de kruif. Hydrodynamics of Dispersed Media. Edited by J.P. Hulin, A.M. Cazab at, E. Guyon, and F. Carmona. Elsevier Science, Amsterdam, The Netherlands, 1990, pp.79-85.

Google Scholar