A novel hybrid nanofiller, SiO2@POSS, where the silica nanoparticles (NPs) and the POSS belong to the same functional structure, has been synthesized by grafting different loadings of OctaMethacrylPOSS onto silanized commercial SiO2, using a surface reaction mediated by dicumylperoxide (DCP). The peroxide, besides anchoring the nanocages onto the silica surface, ensures the presence of methacryl functionalities in the final structure, which are still available for cross-linking reactions with a polymer host. The hybrid SiO2@POSS NPs were used to prepare, by ex situ blending, SBR nanocomposites. The dynamic-mechanical analysis performed on the cured SBR/SiO2@POSS composites indicated that the presence of POSS induces a remarkable increase of modulus either at low or at high strain, and a considerable decrease of hysteresis. This has been associated with the peculiar hybrid structure of the SiO2@POSS filler, in which silica NP aggregates are partially interconnected and surrounded by a thin shell of POSS nanounits which, thanks to their high number of reactive functionalities, promote the formation of "sticky regions" among the silica aggregates and, consequently, a tight filler network wherein rubber is immobilized. This grants a relevant reinforcement and increased hysteretic properties, suggesting SiO2@POSS as a promising filler system for decreasing the energy loss under strain and for leading to a potential reduction of filler utilization in rubber composite formulations.

D'Arienzo, M., Redaelli, M., Callone, E., Conzatti, L., DI CREDICO, B., Dirè, S., et al. (2017). Hybrid SiO2@POSS nanofiller: A promising reinforcing system for rubber nanocomposites. MATERIALS CHEMISTRY FRONTIERS, 1(7), 1441-1452 [10.1039/c7qm00045f].

Hybrid SiO2@POSS nanofiller: A promising reinforcing system for rubber nanocomposites

D'ARIENZO, MASSIMILIANO
Primo
;
REDAELLI, MATTEO
Secondo
;
DI CREDICO, BARBARA;SCOTTI, ROBERTO;MORAZZONI, FRANCA
Ultimo
2017

Abstract

A novel hybrid nanofiller, SiO2@POSS, where the silica nanoparticles (NPs) and the POSS belong to the same functional structure, has been synthesized by grafting different loadings of OctaMethacrylPOSS onto silanized commercial SiO2, using a surface reaction mediated by dicumylperoxide (DCP). The peroxide, besides anchoring the nanocages onto the silica surface, ensures the presence of methacryl functionalities in the final structure, which are still available for cross-linking reactions with a polymer host. The hybrid SiO2@POSS NPs were used to prepare, by ex situ blending, SBR nanocomposites. The dynamic-mechanical analysis performed on the cured SBR/SiO2@POSS composites indicated that the presence of POSS induces a remarkable increase of modulus either at low or at high strain, and a considerable decrease of hysteresis. This has been associated with the peculiar hybrid structure of the SiO2@POSS filler, in which silica NP aggregates are partially interconnected and surrounded by a thin shell of POSS nanounits which, thanks to their high number of reactive functionalities, promote the formation of "sticky regions" among the silica aggregates and, consequently, a tight filler network wherein rubber is immobilized. This grants a relevant reinforcement and increased hysteretic properties, suggesting SiO2@POSS as a promising filler system for decreasing the energy loss under strain and for leading to a potential reduction of filler utilization in rubber composite formulations.
Articolo in rivista - Articolo scientifico
Hybrid nanocomposites, POSS
English
2017
1
7
1441
1452
reserved
D'Arienzo, M., Redaelli, M., Callone, E., Conzatti, L., DI CREDICO, B., Dirè, S., et al. (2017). Hybrid SiO2@POSS nanofiller: A promising reinforcing system for rubber nanocomposites. MATERIALS CHEMISTRY FRONTIERS, 1(7), 1441-1452 [10.1039/c7qm00045f].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/150388
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