Flexible, low-density polymer crosslinked silica aerogels

Polymerization of a di-isocyanate with the amine-modified surface of a sol–gel derived mesoporous silica network crosslinks the nanoparticles of the silica skeleton, and reinforces the otherwise fragile framework. Systematically adjusting the processing variables affecting density produce aerogels w...

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Bibliographic Details
Published inPolymer (Guilford) Vol. 47; no. 16; pp. 5754 - 5761
Main Authors Capadona, Lynn A., Meador, Mary Ann B., Alunni, Antonella, Fabrizio, Eve F., Vassilaras, Plousia, Leventis, Nicholas
Format Journal Article
LanguageEnglish
Published Oxford Elsevier Ltd 26.07.2006
Elsevier
Subjects
Applied sciences
Composites
Di-isocyanates
Exact sciences and technology
Forms of application and semi-finished materials
Mesoporous
Polymer crosslinked aerogels
Polymer industry, paints, wood
Technology of polymers
Mesoporous
Di-isocyanates
Polymer crosslinked aerogels
Molecular structure
Aerogel
Hybrid material
Mechanical properties
Urea polymer
Experimental study
Polyaddition
Silica
Bending strength
Organic diisocyanate
Sol gel process
Preparation
Concentration effect
Lattice structure
Silicon polymer
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Summary:Polymerization of a di-isocyanate with the amine-modified surface of a sol–gel derived mesoporous silica network crosslinks the nanoparticles of the silica skeleton, and reinforces the otherwise fragile framework. Systematically adjusting the processing variables affecting density produce aerogels whose macroscopic properties could be controlled, and are attributed to changing nanoscale morphology. Aerogels crosslinked using the smallest amount of silica studied exhibit as much as a 40-fold increase in strength over the corresponding non-crosslinked framework, and are flexible.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0032-3861
1873-2291
DOI:10.1016/j.polymer.2006.05.073