Abstract
The reinforcement of materials by nanoparticles has been widely studied and applied in many fields of engineering due to their unique surface effects, chemical activity and their particular physical properties. The aim of this study is to improve the mechanical properties of Kevlar®29, by the impregnation of the later, with various weight percentages of colloidal silica-carbon nanotubes. Firstly, the colloidal solutions of silica/CNTs are prepared using LUDOX HS40 suspension mixed with three weight fractions (50, 60 and 70%) of silica. Herein, 0.02% w of CNTs dispersed in ethylene glycol (50, 40 and 30% respectively) and added to the prepared mixtures. Subsequently, the prepared solutions are used to impregnate the Kevlar using a deep flask. The morphology of the impregnated Kevlar with silica (S) and multiwall carbon nanotubes (MWCNT) are characterized by scanning electron microscopy (SEM) and the mechanical properties are highlighted using uniaxial tensile test. The observed morphology using SEM characterization gives rise to a good dispersion of silica particles at the surface of Kevlar fibers without any significant agglomeration. The tensile test results show a large improvement in mechanical properties of the impregnated Kevlar with colloidal solutions containing less than 60% of silica. Therefore, a sensitive decrease is observed above this ratio. The nanoparticles proportion affect directly the different properties of the studied materials. Hence, the rate of nanomaterials should be optimized in order to ensure optimal properties at low cost.
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Kechit, H., Belkhiri, S., Bhakta, A.K., Mekhalif, Z. (2020). Preparation of Silica-Carbon Nanotubes Colloidal Solutions: Application to Kevlar® Reinforcement. In: Benmounah, A., Abadlia, M.T., Saidi, M., Zerizer, A. (eds) Proceedings of the 4th International Symposium on Materials and Sustainable Development. ISMSD 2019. Springer, Cham. https://doi.org/10.1007/978-3-030-43268-3_11
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DOI: https://doi.org/10.1007/978-3-030-43268-3_11
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