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Blast-Proof Curtain Expands Under Explosive Impact
Bomb-proof wallpaper? That’s old hat compared to this new blast-proof curtain developed by Professor Ken Evans at the University of Exeter in the U.K. The curtain, designed to be placed over the windows of high-profile buildings, is woven from yarns of “auxetic”, a remarkable material that actually expands and gets thicker when it is stretched by an explosive impact.
Evans’ bomb-proof curtains are designed to capture debris when windows are blown in by a blast. The Daily Mail explains, “A stretchy fibre provides the core of the yarn and a stiffer fibre is then wound around it. When the stiffer fibre is put under strain, it straightens, causing the stretchy fibre to bulge out sideways – increasing the yarn’s diameter.”
But while the 2 millimeter-thick yarn is thick enough to act as a buffer in a bomb blast, it still lets in ample natural light. And eventually, researchers believe that the yarn will have applications beyond acting as a shield against terrorism. A few possible uses: dental floss that expands as you pull it and self-healing bandages that release antibiotics when wounds swell up. But that’s all in the distant future–the blast-proof curtain won’t be available for another three to five years.
Via UK Daily Mail
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