Silica nanoparticles having different sizes were obtained by the sol-gel process and characterized. The prepared nanoparticles were subsequently used as reinforcing fillers to prepare epoxy-based composites with a silica content ranging from I to 5 wt %. SEM analysis and tensile tests carried out on the silica-epoxy nanocomposites indicated the absence of particle aggregation and a reinforcing effect in terms of increased elastic modulus. Mechanical properties were also modeled by using a finite element code able to construct a numerical model from a microstructural image of the material. A more reliable model was prepared by considering the presence of an interphase layer surrounding the particles with intermediate elastic properties between the epoxy and the inclusions and a characteristic size proportional to the particle radius.

Epoxy-silica nanocomposites: Preparation, experimental characterization and modeling / Bondioli, Federica; Cannillo, Valeria; Fabbri, Elena; Messori, Massimo. - In: JOURNAL OF APPLIED POLYMER SCIENCE. - ISSN 0021-8995. - STAMPA. - 97:(2005), pp. 2382-2386.

Epoxy-silica nanocomposites: Preparation, experimental characterization and modeling

BONDIOLI, Federica;CANNILLO, Valeria;FABBRI, Elena;MESSORI, Massimo
2005

Abstract

Silica nanoparticles having different sizes were obtained by the sol-gel process and characterized. The prepared nanoparticles were subsequently used as reinforcing fillers to prepare epoxy-based composites with a silica content ranging from I to 5 wt %. SEM analysis and tensile tests carried out on the silica-epoxy nanocomposites indicated the absence of particle aggregation and a reinforcing effect in terms of increased elastic modulus. Mechanical properties were also modeled by using a finite element code able to construct a numerical model from a microstructural image of the material. A more reliable model was prepared by considering the presence of an interphase layer surrounding the particles with intermediate elastic properties between the epoxy and the inclusions and a characteristic size proportional to the particle radius.
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Epoxy-silica nanocomposites: Preparation, experimental characterization and modeling / Bondioli, Federica; Cannillo, Valeria; Fabbri, Elena; Messori, Massimo. - In: JOURNAL OF APPLIED POLYMER SCIENCE. - ISSN 0021-8995. - STAMPA. - 97:(2005), pp. 2382-2386.
Bondioli, Federica; Cannillo, Valeria; Fabbri, Elena; Messori, Massimo
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11380/304503
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