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Thermal recoverability of a polyelectrolyte-modified, nanoporous silica-based system

Published online by Cambridge University Press:  03 March 2011

F.B. Surani ,
A. Han  and
Y. Qiao
F.B. Surani
Affiliation:
Department of Civil Engineering, University of Akron, Akron, Ohio 44325-3905
A. Han
Affiliation:
Department of Structural Engineering, University of California at San Diego, La Jolla, California 92093-0085
Y. Qiao*
Affiliation:
Department of Structural Engineering, University of California at San Diego, La Jolla, California 92093-0085
*
a) Address all correspondence to this author. e-mail: yqiao@ucsd.edu
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Abstract

The thermal recoverability of a nanoporous silica-based system modified by a cross-linked polyelectrolyte is investigated. At room temperature, as a nominally hydrostatic pressure is applied, the gel matrix can be partially dehydrated. The released water molecules will be forced into the initially energetically unfavorable nanopores and are “locked” there. At an elevated temperature, the infiltration pressure increases slightly, which is contradictory to the experimental data of the unmodified system. More importantly, the defiltration of the confined liquid is significantly promoted, leading to a much higher system recoverability.

Keywords

AbsorptionInfiltrationNanostructure

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Type
Articles
Information
Journal of Materials Research , Volume 21 , Issue 9 , September 2006 , pp. 2389 - 2392
Copyright
Copyright © Materials Research Society 2006

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References

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