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Preparation of a nanostructured organoceramic and its reversible interlayer expansion

Published online by Cambridge University Press:  31 January 2011

Phillip B. Messersmith ,
Paul Osenar  and
Samuel I. Stupp
Phillip B. Messersmith
Affiliation:
Division of Biological Materials and Department of Biomedical Engineering, Northwestern University, Chicago, Illinois 60611
Paul Osenar
Affiliation:
Department of Materials Science and Engineering and The Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801
Samuel I. Stupp*
Affiliation:
Departments of Materials Science and Engineering and Chemistry, Materials Research Laboratory, and The Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801
*
a)Address all correspondence to this author.
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Abstract

We described previously the liquid phase synthesis and characterization of a nanostructured composite from an aqueous solution containing organic polymer and inorganic ions [J. Mater. Res. 7, 2599 (1992)]. The nanocomposite, termed an organoceramic, consisted of poly(vinyl alcohol) chains intercalated between the principal layers of a hydrated calcium aluminate ceramic. A key structural feature of the organoceramic is the polymer-induced expansion of the interlayer spacing by approximately 10 Å compared to the unmodified ceramic. In this paper, we describe the synthetic scheme that favors organoceramic formation and prove the existence of intercalated polymer by observation of reversible interlayer expansion and contraction in response to changes in ambient humidity. This property is unique to the organoceramic and is not observed in the unmodified calcium aluminate ceramic.

Type
Articles
Information
Journal of Materials Research , Volume 14 , Issue 2 , February 1999 , pp. 315 - 318
Copyright
Copyright © Materials Research Society 1999

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References

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