Mar 302012
 
MELBOURNE, AUSTRALIA - JUNE 04:  Travis Cloke ...

MELBOURNE, AUSTRALIA - JUNE 04: Travis Cloke of the Magpies comes from the field with a cut eye during the round 11 AFL match between the Collingwood Magpies and the St Kilda Saints at Melbourne Cricket Ground on June 4, 2011 in Melbourne, Australia. (Image credit: Getty Images via @daylife)

Our new plastic tries to mimic nature

Gizmag regulars will be well-used to the idea of self-healing materials, and even materials that repair themselves when exposed to light; but a new plastic demonstrated to the American Chemical Society on Monday purports to be the first self-healing material to incorporate a damage-reporting mechanism, almost akin to the bleeding of human skin.

“Our new plastic tries to mimic nature, issuing a red signal when damaged and then renewing itself when exposed to visible light, temperature or pH changes,” said Professor Marek W. Urban, Ph.D of the University of Southern Mississippi.

Urban’s plastic contains molecular bridges that span the polymer chains that comprise the plastic. Should the plastic become damaged, these bridges break down; but when exposed to light (or a temperature or acidic vapor) these linkages are able to repair themselves. But additionally, Urban has rigged the bridges to change color – to red – when such damage occurs, with the color change fading away when the material repairs – essentially heals – itself.

Read more . . .

via Gizmag – 

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