The effect of alkaline treatment on mechanical properties of kenaf fibers and their epoxy composites

Untreated and NaOH treated kenaf fibers were used as reinforcing agent of epoxy resin composites

V. Fiore; G. Di Bella; A. Valenza

2014

Scholarcy highlights

  • Untreated and NaOH treated kenaf fibers were used as reinforcing agent of epoxy resin composites
  • Kenaf fibers were pre-treated in a NaOH solution at room temperature for two different periods
  • The chemical treatment of kenaf fibers for 48 h allowed to clean their surface removing each impurity whereas 144 h of immersion time had detrimental effect on the fibers surface and, on their mechanical properties
  • The effect of the stacking sequence and the chemical treatment on the static mechanical properties was evaluated showing that the composites exhibit higher moduli in comparison to the neat resin
  • The dynamic mechanical analysis showed that the storage and the loss moduli are mainly influenced by the alkali treatment above the glass transition temperature
  • The alkali treatment led to a notable reduction of tan δ peaks in addition to significant shifts of tan δ peaks to higher temperatures whereas the stacking sequence did not influence the trends of storage modulus, loss modulus and damping of the composites

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