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Preparation and performance of polyimide-reinforced clay aerogel composites / Wei Wu in Industrial & engineering chemistry research, Vol. 51 N° 39 (Octobre 2012) 

Public ISBD [article]  in Industrial & 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