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Studies of the Hydrolysis and Polymerization of Silicon Alkoxides in Basic Alcohol Solutions

Published online by Cambridge University Press:  25 February 2011

G. H. Bogush ,
G. L. Dickstein ,
P. Lee ,
K.C.  and
C. F. Zukoski
G. H. Bogush
Affiliation:
IV Department of Chemical Engineering, University of Illinois Urbana, Illinois 61801
G. L. Dickstein
Affiliation:
IV Department of Chemical Engineering, University of Illinois Urbana, Illinois 61801
P. Lee
Affiliation:
IV Department of Chemical Engineering, University of Illinois Urbana, Illinois 61801
K.C.
Affiliation:
IV Department of Chemical Engineering, University of Illinois Urbana, Illinois 61801
C. F. Zukoski
Affiliation:
IV Department of Chemical Engineering, University of Illinois Urbana, Illinois 61801
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Abstract

We report here an experimental technqiue based on changes in reaction medium volume which we have used to observe the kinetics of hydolysis and polymerization of TEOS in aqueous ethanol solutions containing NH3. Our results show that there are three distinct reaction regions. By combining these results with determinations of change in reaction medium conductivity and average particle size, we are able to link the short and long time regions to TEOS hydrolysis and particle growth respectively. The intermediate reaction time region is not associated with hydrolysis, loss of ionic species due to condensation or to particle growth.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 121: Symposium H – Better Ceramics Through Chemistry III , 1988 , 57
Copyright
Copyright © Materials Research Society 1988

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References

REFERENCES

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6) Klemperer, W. G. and Ramamurthi, S. D., “Molecular Growth Pathways in Silic Sol-Gel Polymerization”, to appear in proceeding of Better Ceramics through Chemistry III, held in Reno, Nv, April 1988 Google Scholar
7) Klemperer, W. G., Mainz, V. V., Ramamurthi, S. D., and Rosenberg, R. S., “Structural Characterization of Polysilicate Intermediates Formed During Sol-Gel Processing”, to appear in the proceedings of Better Ceramics through Chemistry III, held in Reno, Nv, April 1988 Google Scholar