Enhanced mechanical properties of unidirectional basalt fiber/epoxy composites using silane-modified Na+-montmorillonite nanoclay |
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| Affiliation: | 1. Department of Materials Engineering, Faculty of Mechanical Engineering, K. N. Toosi University of Technology, Tehran, Iran;2. School of Metallurgy and Materials Engineering, College of Engineering, University of Tehran, Tehran, Iran;1. Milliken Pipe Wrap, Houston, TX 77060, USA;2. Department of Chemical & Biomolecular Engineering, University of Houston, Houston, TX 77204, USA;3. Texas Center for Superconductivity, University of Houston, TX 77204, USA;4. DCD Consulting, LLC, League City, TX 77573, USA;1. Department of Chemistry, Inha University, 100 Inharo, Incheon, Republic of Korea;2. Department of Chemistry, Chungbuk National University, Cheongju, 360-764, Republic of Korea;3. Department of Mechanical Engineering, Kyung Hee University, Yongin, 446-701, Republic of Korea;1. School of Materials Science and Engineering, Northwestern Polytechnical University, Xi''an, 710072, China;2. Faculty of Printing, Packaging and Digital Media Technology, Xi’an University of Technology, Xi''an, 710048, China |
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| Abstract: | This study explores the effects of 3-glycidoxypropyltrimethoxysilane (3-GPTS) modified Na-montmorillonite (Na-Mt) nanoclay addition on mechanical response of unidirectional basalt fiber (UD-BF)/epoxy composite laminates under tensile, flexural and compressive loadings. Fourier transform infrared (FT-IR), X-ray diffraction (XRD) and simultaneous thermal analysis (STA) data confirmed the reaction mechanism between the silane compound and Mt. It was demonstrated that addition of 5 wt % 3-GPTS/Mt resulted in 28%, 11% and 35% increase in flexural, tensile and compressive strengths. Scanning electron microscopy (SEM) clarified the improvement in the adhesion between the basalt fibers and matrix in the case of Mt-enhanced epoxy specimens. Also, a theoretical route based on a Euler-Bernoulli beam-based approach was employed to estimate the compressive properties of the composites. The results demonstrated good agreement between theoretical and experimental approaches. Totally, the results of the study show that matrix modification is an effective strategy to improve the mechanical behavior of fibrous composites. |
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| Keywords: | Multiscale composites Basalt fiber Nanoclay Salinization Mechanical response Microstructure |
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