Adapting carbon nanotubes for fine composite structures
نویسندگان
چکیده
Although defective, commercially-available, CVDgrown, multi-walled carbon nanotubes are widely used for polymer nanocomposites due to their availability and low cost. However, to use these materials effectively, they must be disentangled, and chemically modified in order to produce high quality composites. This paper shows that such nanotubes can be disentangled by cutting; abrupt, repeated exposures to oxidising conditions in air is a clean, convenient and efficient means of producing material with open ends, moderate functionalisation, and enhanced solvent dispersibility; the surface character can easily be tuned to acidic or basic. These approaches could be deliberately integrated into conventional CVD processes, but also have implications for existing products. Matrixfiller interactions can be quantified by examining the contact angle of individual polymer droplets on single nanotubes, and correlated to the mechanical performance of corresponding macroscopic nanocomposites.
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تاریخ انتشار 2008