Natural cork agglomerate employed as an environmentally friendly solution for quiet sandwich composites.

Scientific Reports
James SargianisJonghwan Suhr

Abstract

Carbon fiber-synthetic foam core sandwich composites are widely used for many structural applications due to their superior mechanical performance and low weight. Unfortunately these structures typically have very poor acoustic performance. There is increasingly growing demand in mitigating this noise issue in sandwich composite structures. This study shows that marrying carbon fiber composites with natural cork in a sandwich structure provides a synergistic effect yielding a noise-free sandwich composite structure without the sacrifice of mechanical performance or weight. Moreover the cork-core sandwich composites boast a 250% improvement in damping performance, providing increased durability and lifetime operation. Additionally as the world seeks environmentally friendly materials, the harvesting of cork is a natural, renewable process which reduces subsequent carbon footprints. Such a transition from synthetic foam cores to natural cork cores could provide unprecedented improvements in acoustic and vibrational performance in applications such as aircraft cabins or wind turbine blades.

References

Jan 22, 2005·The Journal of the Acoustical Society of America·Eja Pedersen, Kerstin Persson Waye
Jul 26, 2008·Nature Nanotechnology·J SuhrP M Ajayan

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Citations

Dec 5, 2015·FEMS Microbiology Letters·Filipa GonçalvesCristina Almeida-Aguiar
Feb 10, 2015·Materials·Luís Gil

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