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<p>The mechanical, acoustic, and water absorption characteristics of basalt (B) and kenaf (K)-based hybrid composites were examined by varying the weight percentage (wt%) of graphene nanoparticles (GNPs). The laminates were fabricated with different GNP contents (0, 0.5, 1.0, and 1.5 wt%) and varied stacking sequences. The results showed that the addition of GNPs enhanced the laminated composites’ tensile (295 MPa), flexural (159 MPa), and impact (89 kj/m<sup>2</sup>) properties. However, depending on the laminate’s stacking order, the optimum weight percentage of GNPs varied. The laminates containing 1 wt% GNPs exhibited the lowest moisture uptake (0.98%) with a minimum diffusion coefficient of 0.006×10 mm<sup>2</sup>/s, confirming their superior resistance to water absorption. The inclusion of different GNP loadings further improved the epoxy-based hybrid composite’s acoustic insulation performance. The sound attenuation at lower frequencies (250–500 Hz) was moderate for both lower GNP concentrations (0–1 wt%), ranging from 15.5 to 17.2 dB. However, increasing the GNP content to 1.5% resulted in a notable improvement in sound attenuation. In terms of density, the composites maintained low void fractions between 2.1 and 3.9%, well within the acceptable 5% limit for structural applications. With a sound attenuation of about 26.0 dB at 10,000 Hz, it is evident that the composites from Group V, which contained 1.5% GNPs, delivered the best results.</p>

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Next-Gen Hybrid Nanocomposites: Exploring the Mechanical, Moisture Diffusion, and Acoustic Excellence of Basalt/Hibiscus Cannabinus/Graphene Composites

  • 期刊论文

  • 发表日期：

    2026年3月23日

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  • G. Velmurugan,
  • Jasgurpreet Singh Chohan,
  • K. Babu,
  • S. A. Muhammed Abraar,
  • Ramya Maranan,
  • L. Natrayan,
  • J. Sudhakar

摘要

The mechanical, acoustic, and water absorption characteristics of basalt (B) and kenaf (K)-based hybrid composites were examined by varying the weight percentage (wt%) of graphene nanoparticles (GNPs). The laminates were fabricated with different GNP contents (0, 0.5, 1.0, and 1.5 wt%) and varied stacking sequences. The results showed that the addition of GNPs enhanced the laminated composites’ tensile (295 MPa), flexural (159 MPa), and impact (89 kj/m2) properties. However, depending on the laminate’s stacking order, the optimum weight percentage of GNPs varied. The laminates containing 1 wt% GNPs exhibited the lowest moisture uptake (0.98%) with a minimum diffusion coefficient of 0.006×10 mm2/s, confirming their superior resistance to water absorption. The inclusion of different GNP loadings further improved the epoxy-based hybrid composite’s acoustic insulation performance. The sound attenuation at lower frequencies (250–500 Hz) was moderate for both lower GNP concentrations (0–1 wt%), ranging from 15.5 to 17.2 dB. However, increasing the GNP content to 1.5% resulted in a notable improvement in sound attenuation. In terms of density, the composites maintained low void fractions between 2.1 and 3.9%, well within the acceptable 5% limit for structural applications. With a sound attenuation of about 26.0 dB at 10,000 Hz, it is evident that the composites from Group V, which contained 1.5% GNPs, delivered the best results.