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Biogenic Hydroxylated Carboxylate Monomers Serve as Dispersants for Ceramic Particles

Published online by Cambridge University Press:  15 February 2011

Tao Ren ,
I. A. Aksay ,
M. Yasrebi ,
N. B. Pellerin  and
J. T. Staley
Tao Ren
Affiliation:
Department of Microbiology, University of Washington, Seattle, Washington 98195
I. A. Aksay
Affiliation:
Department of Chemical Engineering and Princeton Materials Institute, Princeton University, Princeton, New Jersey 08544
M. Yasrebi
Affiliation:
Structurals Division – Technical Center, Precision Castparts Corporation, Portland, Oregon 97206
N. B. Pellerin
Affiliation:
Department of Microbiology, University of Washington, Seattle, Washington 98195
J. T. Staley
Affiliation:
Department of Microbiology, University of Washington, Seattle, Washington 98195
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Abstract

A total of 20 biogenic carboxylic acids, which contain one to three negatively charged -COO− group(s), were investigated as dispersion additives in the processing of ceramic particles. Only carboxylic acids containing one or more hydroxyl groups were able to disperse α-A12O3 particles in aqueous suspensions. Detailed studies of two carboxylic acids, citric acid and tricarballylic acid were undertaken: measurements of zeta potential, particle packing, and dispersant adsorption characeristics indicated that carboxylic acid groups and hydroxyl groups are both important for dispersion of the ceramic particles. Hydroxyl groups increased the adsorption of the molecules to the particles.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 330: Symposium S – Biomolecular Materials by Design , 1993 , 113
Copyright
Copyright © Materials Research Society 1994

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References

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