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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

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

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Livi, Sebastien [1, 2, 3] ; Silva, Adriana A. [4] ; Pereira, Jessica [4] ; Nguyen, Thi Khanh Ly [5] ; Soares, Bluma Guenther [4] ; Cardoso, Mateus Borba [6] ; Gerard, Jean-Francois [7, 8, 5] ; Duchet-Rumeau, Jannick [7, 8, 5]
Total Authors: 8
[1] Univ Lyon, F-69003 Lyon - France
[2] INSA Lyon, F-69621 Villeurbanne - France
[3] CNRS, UMR 5223, F-69621 Villeurbanne - France
[4] Univ Fed Rio de Janeiro, Inst Macromol, BR-27941598 Rio De Janeiro, RJ - Brazil
[5] Thi Khanh Ly Nguyen, CNRS, UMR 5223, F-69621 Villeurbanne - France
[6] LNLS, BR-13083970 Campinas, SP - Brazil
[7] Thi Khanh Ly Nguyen, Univ Lyon, F-69003 Lyon - France
[8] Thi Khanh Ly Nguyen, INSA Lyon, F-69621 Villeurbanne - France
Total Affiliations: 8
Document type: Journal article
Source: CHEMICAL ENGINEERING JOURNAL; v. 241, p. 103-111, APR 1 2014.
Web of Science Citations: 10

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. (C) 2013 Elsevier B.V. All rights reserved. (AU)

FAPESP's process: 11/21954-7 - Functionalization of composite nanoparticles for biomedical applications
Grantee:Mateus Borba Cardoso
Support Opportunities: Regular Research Grants