[article] 
inIndustrial & engineering chemistry research > Vol. 51 N° 39 (Octobre 2012) . - pp. 12821-12826

Titre :	Preparation and performance of polyimide-reinforced clay aerogel composites
Type de document :	texte imprimé
Auteurs :	Wei Wu, Auteur ; Kai Wang, Auteur ; Mao-Sheng Zhan, Auteur
Année de publication :	2012
Article en page(s) :	pp. 12821-12826
Note générale :	Industrial chemistry
Langues :	Anglais (eng)
Mots-clés :	Composite material Preparation
Résumé :	Low-density polyimide (PI)/clay aerogel composites were produced by freeze-drying of a poly(amic acid) ammonium salt/clay precursor suspension, followed by a multistep temperature-programmed imidization. The densities of the resulting aerogel composites were in the range of 0.04―0.09 g·cm―3. With the increase of PI content, a more perfect "layer―strut" bracing structure was exhibited in the composites, which resulted in vastly improved mechanical properties. Polyimide did not intercalate the interlayer of clay, and the onset decomposition temperatures (Td) of the aerogels were more than 410 °C. The obtained PI/clay aerogel composites show considerable promise in structural and high-temperature insulation applications.
ISSN :	0888-5885
En ligne :	http://cat.inist.fr/?aModele=afficheN&cpsidt=26419238

[article] Preparation and performance of polyimide-reinforced clay aerogel composites [texte imprimé] / Wei Wu, Auteur ; Kai Wang, Auteur ; Mao-Sheng Zhan, Auteur . - 2012 . - pp. 12821-12826.
Industrial chemistry
Langues : Anglais (eng)
in Industrial & engineering chemistry research > Vol. 51 N° 39 (Octobre 2012) . - pp. 12821-12826

Mots-clés :	Composite material Preparation
Résumé :	Low-density polyimide (PI)/clay aerogel composites were produced by freeze-drying of a poly(amic acid) ammonium salt/clay precursor suspension, followed by a multistep temperature-programmed imidization. The densities of the resulting aerogel composites were in the range of 0.04―0.09 g·cm―3. With the increase of PI content, a more perfect "layer―strut" bracing structure was exhibited in the composites, which resulted in vastly improved mechanical properties. Polyimide did not intercalate the interlayer of clay, and the onset decomposition temperatures (Td) of the aerogels were more than 410 °C. The obtained PI/clay aerogel composites show considerable promise in structural and high-temperature insulation applications.
ISSN :	0888-5885
En ligne :	http://cat.inist.fr/?aModele=afficheN&cpsidt=26419238