The first test of the impact of
the nanotube yarn was performed this month in a hydrogrowth radiography experiment on NIF.
Because of their scalable nature, the researchers say these carbon
nanotube yarns could be used anywhere reliable kinetic energy is available.
This wouldn't be the first artificial muscle on the market: there are carbon
nanotube yarns and metal wires, but they're often expensive or store relatively low amounts of energy compared to their competitors, scientists said.
The team spins carbon
nanotube yarns with diameters on the scale of a few microns, or millionths of a meter.
Not exact matches
The group twisted carbon
nanotube fibers into a
yarn, then coated one piece of
yarn with zinc to form an anode, and another with magnesium oxide to form a cathode.
One company's special manufacturing process turns out
yarns and sheets millions of time the size of normal
nanotubes.
The Australian team at CSIRO is one of the principal global experts with the know - how to manufacture
yarns from carbon
nanotubes.
Even more powerful artificial muscles have been made from
yarns spun from hollow carbon fibers called single - walled
nanotubes (SWNTs).
That consistent orientation is critical, because it ensures that when an electrical stimulus changes the length of one
nanotube fiber, all of its neighbors change in the same way, causing the
yarn to contract or expand.
The «twistron harvester» is made of
nanotubes spun into a
yarn around a twentieth of a millimetre thick and twisted into tiny coils.
Nanocomp says it can produce
nanotubes that are tens to hundreds of times as long, forming carbon
yarns and sheets (
yarns up to one kilometer in length, with a tensile strength better than steel, and sheets made in 18 - square - foot sections).
They then weave millions of the
nanotube threads into a
yarn, in much the same way that weavers have spun wool to make
yarn throughout the centuries.