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<p>Due to environmental concerns, bio-composites are increasingly becoming an alternative to replace some conventional materials. Improving environmental performance involves the use of vegetable fibres, which strengthen bio-sourced materials and improve their properties. Therefore, the aim of this work is to develop a new green sandwich bio-composite with skins composed of a laminate based on green epoxy resin and date palm leaflets and cork as a core. Date palm leaflets are mainly selected due to their availability and abundance in Algeria as agro-waste. The bio-sandwich hand-made produced was subjected to low-velocity impacts with three different energies (1&#xa0;J, 2&#xa0;J and 3&#xa0;J). Comparing the results obtained with those of a bio-laminate of the same architecture showed that the maximum load is 13.1% lower, while the maximum displacement, contact time and restored energy are 20.7%, 21.3% and 14.9% higher, respectively. These advantages result from the alveolar structure of cork, which gives it higher specific strength and stiffness, a Poisson’s ratio that is nearly zero, and a strong strength to impact load damage.</p>

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Impact response of new bio-sandwiches manufactured with a cork core and laminate skins based on leaflets palm date and a green epoxy resin

  • 期刊论文

  • 发表日期：

    2025年9月11日

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  • Nasser Bouhemame,
  • Paulo Santos,
  • Paulo N. B. Reis,
  • Abderrezak Bezazi,
  • Salah Ellagoune,
  • Fabrizio Scarpa

摘要

Due to environmental concerns, bio-composites are increasingly becoming an alternative to replace some conventional materials. Improving environmental performance involves the use of vegetable fibres, which strengthen bio-sourced materials and improve their properties. Therefore, the aim of this work is to develop a new green sandwich bio-composite with skins composed of a laminate based on green epoxy resin and date palm leaflets and cork as a core. Date palm leaflets are mainly selected due to their availability and abundance in Algeria as agro-waste. The bio-sandwich hand-made produced was subjected to low-velocity impacts with three different energies (1 J, 2 J and 3 J). Comparing the results obtained with those of a bio-laminate of the same architecture showed that the maximum load is 13.1% lower, while the maximum displacement, contact time and restored energy are 20.7%, 21.3% and 14.9% higher, respectively. These advantages result from the alveolar structure of cork, which gives it higher specific strength and stiffness, a Poisson’s ratio that is nearly zero, and a strong strength to impact load damage.