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New fibre looks like cotton, conducts
electricity
Friday January 11, 2013 07:48:29 PM,
IANS
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Washington:
Scientists have unveiled a revolutionary carbon nanotube (CNT)
fibre that looks and acts like a cotton thread and conducts
electricity and heat like a metal wire.
Researchers achieved a breakthrough, capping 10 years of efforts
that make threadlike fibres possible, beating high-performance
materials in a number of ways.
"We finally have a nanotube fibre with properties that do not
exist in any other material. It looks like black cotton thread,
but behaves like both metal wires and strong carbon fibers," said
Matteo Pasquali, professor of chemical and biomolecular
engineering and chemistry at Rice University, Houston, Texas, who
led the research, the journal Science reports.
Pasquali's team included academic, government and industrial
scientists from Rice, besides team members from Teijin Aramid,
headquartered in Arnhem, the Netherlands; the Technion-Israel
Institute of Technology in Haifa, Israel; and the Air Force
Research Lab in Ohio, according to a Rice statement.
"The new CNT fibres have a thermal conductivity approaching that
of the best graphite fibres but with 10 times greater electrical
conductivity," said study co-author Marcin Otto, business
development manager at Teijin Aramid.
"Graphite fibres are also brittle, while the new CNT fibres are as
flexible and tough as a textile thread. We expect this combination
of properties will lead to new products with unique capabilities
for the aerospace, automotive, medical and smart-clothing
markets," Otto said.
The phenomenal properties of carbon nanotubes have enthralled
scientists from the moment of their discovery in 1991. The hollow
tubes of pure carbon, which are nearly as wide as a strand of DNA,
are about 100 times stronger than steel at one-sixth the weight.
Nanotubes' conductive properties -- for both electricity and heat
-- rival the best metal conductors. They also can serve as
light-activated semiconductors, drug-delivery devices and even
sponges to soak up oil.
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