Carbon nanotube: now clearly stronger than the rest

It works in the lab, it is often said of new technologies. Now some individual strands of the carbon nano tube fiber material have clearly outperformed in strength the strongest currently commercially available fibers, according to the MIT Technology Review Monday Nov. 19 web update.

Alan Windle, a professor of materials science at the University of Cambridge, in England, made and tested the new nanotube fibers along with researchers at the Natick Soldier Research Development Center, in Massachusetts. In his methodology there is still a clear manufacturing variation; the weakest of the fibers only about averaged the strength of steel, while it seems the average strength of the fibers made with this method was about similar to "materials used in bullet-proof vests, such as Kevlar. These nanotube fibers matched the highest reported strengths for a couple of the strongest commercially available fibers, Zylon and Dyneema, also used in bullet-proof vests". The lone really strong fiber  endured about 150 % of the strength of these, nine gigapascals of stress -far beyond any other reported material - before breaking.

In a video caption that follows the information from TR, the manufacturing method indeed looks as if the fiber would be very uneven in thickness and eventually also quality; thus also the usable pieces of the fiber are relatively short. If the manufacturing variation can be brought down and close to the upper end of the spectrum, this promises for an extremely lightweight (fiber wall thickness is that of just one layer of atoms!) and durable material with possible applications ranging "from body armor to oil drilling". I'd personally like to have a motorbiking helmet that would be lighter on my aging neck in highway speeds.

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