탄소나노튜브 첨가에 따른 PTFE 도료의 물성변화 연구

Abstract

Carbon nanotubes(CNT) have been in the focus of scientific attention ever since their discovery in 1993. Most often visualized as rolled-up graphite sheets with diameters between 0.5 and 2 nm and lengths of several micrometers, these unique structures are expected to have a serious impact on nano industry soon. Carbon nanotubes exhibit extraordinary mechanical and electronic properties. However, manipulation and processing of CNT has been limited by their insolubility in most common solvents, although some dissolution has recently been obtained. Wrapping with polymers has also provided a supramolecular approach to solubilization of CNT. Considerable effort has therefore been devoted to the chemical modification of CNT, which might pave the way to many useful applications, including composite preparations. carbon nanotubes were oxidatively functionalized by sulfuric/nitric acid treatment. The presence of carboxyl groups and properties of CNT/PTFE composite applications was proven by IR spectroscopy, zeta Potential, Contact angle, TGA and so on. The implications of the surface modification are discussed primarily in terms of nanotube -polymer composite. This studies show the improvement of mechanical, electronic properties of nanotube polymer composites by the surface modification of CNT.