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<p>Hybrid natural-synthetic fiber composites provide a great combination of strength, sustainability and cost-effectiveness. This research explores the viscoelastic properties of sisal/e-glass fiber-reinforced hybrid composites loaded with graphene nanoplatelets. These specimens comprised pure sisal fiber composite (SFC), pure glass fiber composite (GFC), and hybrid fiber (HFC) composites. Graphene was included within the hybrid fiber composite (GHC), with varying weight percentages of 0.25%, 0.5%, 0.75%, and 1%. Dynamic Mechanical Analysis (DMA) was employed to assess storage modulus, loss modulus, and damping factor. Results revealed dependencies on the frequency and nano additive content. GFC exhibited higher storage modulus, loss modulus and lower damping factor compared to SFC. Hybridizing of sisal and e-glass fibers, resulted in an intermediate storage modulus, loss modulus and damping factor. Addition of graphene in hybrid composite influenced all three properties. Low concentration of graphene incorporation reduced storage and loss modulus due to insufficient interaction with the matrix. High concentrations of graphene lead to agglomeration, resulting in non-homogeneous distribution and a reduction in storage and loss modulus. 0.5% (by wt) yielded highest storage modulus and loss modulus showing superior energy dissipation capabilities. For high damping applications, hybridization of glass fiber composite with sisal fibers along with addition of 0.25% (by wt) graphene enhanced the damping properties by 16% and 15% at 1&#xa0;Hz and 10&#xa0;Hz, respectively over pure glass fiber composites. For low damping applications, sisal fiber has to be hybridized with glass fibers and incorporation of 0.5% (by wt) of graphene decreases the damping factor by 53% and 57%, respectively, at 1&#xa0;Hz and 10&#xa0;Hz over pure sisal fiber composites.</p> Graphical abstract <p></p>

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Influence of graphene nanoplatelets on viscoelastic performance of sisal-glass hybrid composites

  • 期刊论文

  • 发表日期：

    2026年2月27日

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  • Amrita Maddamasetty,
  • Naveen Kumar Ankem,
  • Veera Venkata Prasad Reddy Chirla,
  • Minnarao Sativada,
  • David Bunny Vanthala

摘要

Hybrid natural-synthetic fiber composites provide a great combination of strength, sustainability and cost-effectiveness. This research explores the viscoelastic properties of sisal/e-glass fiber-reinforced hybrid composites loaded with graphene nanoplatelets. These specimens comprised pure sisal fiber composite (SFC), pure glass fiber composite (GFC), and hybrid fiber (HFC) composites. Graphene was included within the hybrid fiber composite (GHC), with varying weight percentages of 0.25%, 0.5%, 0.75%, and 1%. Dynamic Mechanical Analysis (DMA) was employed to assess storage modulus, loss modulus, and damping factor. Results revealed dependencies on the frequency and nano additive content. GFC exhibited higher storage modulus, loss modulus and lower damping factor compared to SFC. Hybridizing of sisal and e-glass fibers, resulted in an intermediate storage modulus, loss modulus and damping factor. Addition of graphene in hybrid composite influenced all three properties. Low concentration of graphene incorporation reduced storage and loss modulus due to insufficient interaction with the matrix. High concentrations of graphene lead to agglomeration, resulting in non-homogeneous distribution and a reduction in storage and loss modulus. 0.5% (by wt) yielded highest storage modulus and loss modulus showing superior energy dissipation capabilities. For high damping applications, hybridization of glass fiber composite with sisal fibers along with addition of 0.25% (by wt) graphene enhanced the damping properties by 16% and 15% at 1 Hz and 10 Hz, respectively over pure glass fiber composites. For low damping applications, sisal fiber has to be hybridized with glass fibers and incorporation of 0.5% (by wt) of graphene decreases the damping factor by 53% and 57%, respectively, at 1 Hz and 10 Hz over pure sisal fiber composites.

Graphical abstract