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Resorcinol-Formaldehyde and Carbon Aerogel Microspheres

Published online by Cambridge University Press:  10 February 2011

C. T. Alviso ,
R. W. Pekala ,
J. Gross ,
X. Lu ,
R. Caps  and
J. Fricke
C. T. Alviso
Affiliation:
Chemistry and Materials Science Directorate Lawrence Livemore National Laboratory Livermore, CA 94550
R. W. Pekala
Affiliation:
Chemistry and Materials Science Directorate Lawrence Livemore National Laboratory Livermore, CA 94550
J. Gross
Affiliation:
Chemistry and Materials Science Directorate Lawrence Livemore National Laboratory Livermore, CA 94550
X. Lu
Affiliation:
Physikalisches Institut, Universität, Am Hubland, 97074 Würzburg, Germany
R. Caps
Affiliation:
Physikalisches Institut, Universität, Am Hubland, 97074 Würzburg, Germany
J. Fricke
Affiliation:
Physikalisches Institut, Universität, Am Hubland, 97074 Würzburg, Germany
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Abstract

Aerogels are a unique class of materials possessing an open-cell structure with ultrafine cells/pores (<100nm), high surface area (400–1100 m2/g), and a solid matrix composed of interconnected particles, fibers, or platelets with characteristic dimensions of 10nm. Although monolithic aerogels are ideal candidates for many applications (e.g. transparent window insulation), current processing methods have limited their introduction into the commercial marketplace. Our research focuses on the formation of resorcinol-formaldehyde (RF) aerogel microspheres which offer an attractive alternative to monolith production. An inverse emulsion polymerization is used to produce these spherical gel particles which undergo solvent exchange followed by supercritical drying with carbon dioxide. This process yields aerogel microspheres (10–80μ diameter) which can be used as loosely packed powders, compression molded into nearnet shapes using a polymer binder, or used as additives in conventional foaming operations to produce new aerogel composites with superior thermal properties. The emulsification procedure, thermal characterization, mechanical properties, and potential applications of RF aerogel microspheres will be discussed.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 431: Symposium P – Microporous and Macroporous Materials , 1996 , 521
Copyright
Copyright © Materials Research Society 1996

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References

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