Bullet-proof t-shirt uses carbon nanotubes
If you're worried about the nanotech military applications described in my last two posts, you may be able to defend yourself with a nano-enabled bullet-proof t-shirt.
Nanowerk reports that a team led by Professor Liangchi Zhang at the University of Sydney is investigating ballistic-resistance materials using carbon nanotubes.
"Especially in making bullet-proof vests, shields, and explosion proof blankets," said Zhang, "the best protective material will have a high level of elastic storage energy that will cause the projectile to bounce off or be deflected."
In his experiments, Zhang found that carbon nanotubes could be resilient to projectiles traveling at speeds of 200-1400 meters per second. The velocity of a typical rifle bullet is between 180 and 1500 meters per second. (photo of non-nano bullet-proof t-shirt LBA International)
The linked report says that “the objective is to reduce the effects of ‘blunt trauma’ on the wearer after being struck by a bullet.” The author’s journal article will have precise numbers on shock absorption.
November 27th, 2006 at 1:13 amMight stop a projectile but will it absorb the shock as well?
November 27th, 2006 at 1:15 amA piece of diamond having 1903 atoms was used as a bullet with its speed varying from 100 to 1500 m/s. The bullet dimension was selected such that the width is larger than the width of the biggest nanotube after flattening. The bullet was released from a target about 15 Â from the center axis of the nanotube and moved at a constant speed in the horizontal direction i.e., perpendicular to the nanotube axis, as shown in the graphic above. The nanotube performance was examined for bullet released with various speeds at various positions using the classical molecular dynamics method.
August 13th, 2007 at 6:30 amWill the whole impact side of the t-shirt go rigid? Sounds awesome, might make excellent space craft armor as well.
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February 21st, 2011 at 4:00 pmCNT could be resilient to projectile traveling at speeds of 200–1400 m/s (for comparison, the initial velocity of modern rifle bullets is somewhere between 180 and 1500 m/s, depending on gun and bullet type. For a typical over-the-counter gun the speed is below 1000 m/s); the nanotube enduring projectile speed increases whereas the absorption efficiency decreases with the increase in relative height ?. For a nanotube with both ends fixed, the absorption energy reaches maximum whereas the absorption efficiency reaches minimum when the bullet strikes the nanotube in the middle. ISP Private Security service99 – http://security.ispozelguvenlik.com.tr
April 7th, 2011 at 3:15 pm