Supercritical CO2-organosilane mixtures for modification of silica: Applications to epoxy prepolymer matrix - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue The Chemical Engineering Journal Année : 2014

Supercritical CO2-organosilane mixtures for modification of silica: Applications to epoxy prepolymer matrix

Sébastien Livi
Adriana A. Silva
  • Fonction : Auteur
Jessica Pereira
  • Fonction : Auteur
Bluma Guenther Soares
  • Fonction : Auteur

Résumé

This work is focused on the use of supercritical carbon dioxide (ScCO2) as an environmentally friend process to improve the surface functionalization of silica nanoparticles with amino- and perfluoro-silanes. Here, we combine the use of a phosphonium ionic liquid which plays a role of an activator of silanol groups in ScCO2 to increase the grafting density of silane agents on silica. Then, diglycidyl ether of bisphenol A (DGEBA)-based epoxy nanocomposites filled with different amount of new functionalized silicas (1, 2.5 and 3.5 phr) are prepared and characterized by dynamic-mechanical analysis, transmission electron microscopy and small-angle X-ray scattering. Finally, the treated silica/epoxy systems exhibit better mechanical properties (+30%) when compared to neat epoxy.
Fichier non déposé

Dates et versions

hal-00949774 , version 1 (20-02-2014)

Identifiants

Citer

Sébastien Livi, Adriana A. Silva, Jessica Pereira, Thi Khanh Ly Nguyen, Bluma Guenther Soares, et al.. Supercritical CO2-organosilane mixtures for modification of silica: Applications to epoxy prepolymer matrix. The Chemical Engineering Journal, 2014, 241, pp.103-111. ⟨10.1016/j.cej.2013.12.013⟩. ⟨hal-00949774⟩
232 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More