Carbon Nanotubes are so light that they float in airpic.twitter.com/AlHWeap8cm
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Why wrapping them reduce the tensile strength?
Carbon Nanotubes have a "tensile strength" σ of about 60 Giga-Pascals
weighs about 20,000 Newtons
I think it's because it messes up the "perfect" alignment of the 2D graphene, which is the source of its original strength (cont..)
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"To find out why, Feng Ding of the Hong Kong Polytechnic University and his colleagues simulated CNTs with a single atom out of place, turning two of the hexagons into a pentagon and heptagon, and creating a kink in the tube. They found this simple change was enough to cut the.."
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".. ideal strength of a CNT to 40 GPa, with the effect being even more severe when they increased the number of misaligned atoms." cite:https://www.newscientist.com/article/2093356-carbon-nanotubes-too-weak-to-get-a-space-elevator-off-the-ground/ …
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