Thermal conductivity of a clay-based aerogel

Thermal conductivity of a clay-based aerogel

Aerogel materials exhibit superior thermal insulation characteristics due largely to their highly porous internal structure. A recently developed class of montmorillonite clay-based aerogels provides the attractive thermal properties of traditional aerogel materials using constituents that are chemi...

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Bibliographic Details
Published in:International journal of heat and mass transfer Vol. 52; no. 3; pp. 665 - 669
Main Authors: Hostler, S.R., Abramson, A.R., Gawryla, M.D., Bandi, S.A., Schiraldi, D.A.
Format: Journal Article
Language:English
Published: Kidlington Elsevier Ltd 31-01-2009
Elsevier
Subjects:
Aerogel
Applied sciences
Clay
Effective medium
Energy
Energy. Thermal use of fuels
Exact sciences and technology
Heating, air conditioning and ventilation
Technical data: comfort, insulation, loads, etc
Thermal conductivity
Clay
Thermal conductivity
Aerogel
Effective medium
Polyvinylalcohol
Montmorillonite
Thermal insulation
Comparative study
Strength
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Summary:Aerogel materials exhibit superior thermal insulation characteristics due largely to their highly porous internal structure. A recently developed class of montmorillonite clay-based aerogels provides the attractive thermal properties of traditional aerogel materials using constituents that are chemically benign and abundantly available. Results are compared for aerogels made from clay alone and those with polyvinyl alcohol introduced during processing. Results demonstrate that as well as strength advantages, the addition of the polymer also leads to a reduction in thermal conductivity. Experimental thermal conductivity data as well as a model to describe the mechanisms involved in impeding thermal transport are presented.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0017-9310
1879-2189
DOI:10.1016/j.ijheatmasstransfer.2008.07.002