This video highlights the high temperature stability of CNT yarns compared to copper wire by applying a 1430 C butane torch to both materials. The copper wire lasts about 5 seconds before melting, while the CNT yarn survives the torch for more than 30 seconds without any visible damage. The high thermal stability and superior thermal conductivity of the CNT material is most likely the reason that it is able to survive exposure to the flame from the torch. The impressive thermal properties of CNT fibers and films make them highly promising for application in flame retardant materials such as those used in firefighter suits.
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