We have synthesiszed hollow carbon nanotubes but the micromechanical and mesomechanical domain do not use hollow fibres. It could be very economical for torsional and bending applications with lot of weight savings. There is a double interface with the matrix that strengthens the composite. Besides, due to skin effect the AC current flows only through the skin and not the core . Why not a conducting hollow graphitic fibre at least? This could be novel and possessing higher specific properties. Why is this domain not popular though it was meant to be a path traversed through logical evolution?
If you have a look at the wikipedia article of carbon nano tubes (CNT) you can find many papers on the application of CNTs in the structural and electronic sector. I think the production technique is just not mature, effective and economic enough to have products on the free market.
I think my question is misunderstood. CNTs are in the nano domain. I am talking abut the microdomain where you have carbon, kevlar, zylon, glass and others with a dia of 5-15 microns. Why aren't hollow fibres attempted in the microdomain that would save weight further with two interfaces to give you a better bond strength, torsional rigidity and bending properties ?. Can any one throw some light on this ?
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