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Master Thesis

Mechanical behavior of polyurea nanocomposites doped with nanoparticles

Abstract : Recently, carbon nanotubes and graphene nanoplatelets have attracted both academic and industrial interest because of their capacity to produce a dramatic improvement in properties at very low filler content. In this work, we focused on experimental studies and computational modeling of polymer nanocomposites intended for passive protection of civil structures. The material considered in this study consisted of a polyurea matrix enhanced by different quantities of nanoparticles. Different renforts and matrixes have been used to fabricate nanoparticles polymer nanocomposites by a range of methods. Several tensile tests were performed to evaluate and characterize the behavior of the studied materials in order to choose the appropriate manufacturing protocol and the suitable enhancement. Furthermore, a finite elements model was achieved The main goal of this study was to achieve a parametric determination of the tested materials in order to find a general model. The manufacturing protocol study had led to an ultrasonic dispersion of the nanoparticles instead of a mechanical stirring. Degrading the properties of the initial material, the mechanical mixing method does not disaggregate the nanoparticles, which is an important factor in the nanoreinforcement. The results indicate that an arbitrary amount of carbon nanotubes and graphene nanoplatelets may result in suboptimal performance and more specifically 0.5% in weight of carbon nanotubes and 2% in weight of graphene nanoplatelets yield the best mechanical performance in each nanocomposite family. However, comparing these two optimums, the graphene nanoplatelets doped material leads to the best performance
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Master Thesis
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Submitted on : Friday, March 18, 2011 - 12:46:32 PM
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Emilien Billaudeau. Mechanical behavior of polyurea nanocomposites doped with nanoparticles. Materials. 2010. ⟨dumas-00578094⟩

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