Since Iijima’s report in 1991 carbon nanotubes have been the focus of considerable research. Much effort has been given to maximize the potential of CNTs as reinforcing agents in polymer matrix composites during the last decade. The work done in this area keep growing exponentially every year, as shown below.

In order to achieve the true potential of nanotubes, several challenges have to be faced. Carbon nanotubes have to be produced with higher purity, integrity, in larger amounts, and at a lower price. They have to have longer lengths. Concerning the composites technology, issues such as orientation of the CNTs, their concentration, interfacial adhesion, distribution and dispersion have to be overcome.