Journal of Polymer & Composites Original Research Special issue
Characterization of Glass Fiber/Epoxy Laminates Modified with MWCNT–Al₂O₃ Hybrid Nanofillers
Abstract
Enhancing the performance of fibre-reinforced polymer composites increasingly involves the integration of nanoscale additives that can improve strength, toughness, and overall durability. In the present investigation, woven E-glass/epoxy laminates were modified using a hybrid nanofiller system consisting of multi-walled carbon nanotubes (MWCNTs) and aluminium oxide (Al₂O₃) nanoparticles. The two nanomaterials were combined in a 2:4 proportion and introduced into the epoxy matrix at total loadings of 1%, 3%, and 5% by weight. Laminates were produced in accordance with ASTM D638 and ASTM D256 to ensure consistent tensile and impact characterisation. The mechanical response of the composites showed a progressive improvement with increasing hybrid filler concentration. The formulation containing 5 wt.% hybrid nanofiller displayed the most pronounced enhancement among all tested batches. In particular, the 450 GSM laminate incorporating this filler level demonstrated a 46% rise in tensile strength along with an 84% increase in impact energy when compared to the unmodified E-glass/epoxy reference laminate. Moreover, the 450 GSM specimens consistently outperformed the lower-GSM laminates, indicating that higher fabric areal density, coupled with the synergistic strengthening action of MWCNTs and Al₂O₃ nanoparticles, contributes to more efficient load transfer and crack-resistance mechanisms. These results highlight the potential of hybrid nanofiller reinforcement as a viable route for developing robust, high-performance E-glass/epoxy composites for structural applications.
Keywords
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