Who: Vladimir Kuznetsov, Boreskov Institute of catalysis SBRAS / Novosibirsk State University, Novosibirsk, Russia
Place: nanoGUNE seminar room, Tolosa Hiribidea 76, Donostia - San Sebastian
Date: Monday, 22 February 2016, 11:00
Multi-walled carbon nanotubes (MWCNTs) are known as the most perspective components for numerical composite materials because their remarkable mechanical, chemical, and electronic properties. At the same time properties of MWCNTs significantly depend on their structure (defectiveness, diameter distribution, morphology of agglomerates, concentration of impurities etc.) which in turn depends on the type of process and on reaction parameters used for the production. For synthesis of MWCNTs by catalytic CVD techniques the nature of catalysts (metals, supports, metal-support interaction, and the effect of promoters), are the most important factors. Production of effective composites requires fulfillment of conditions of uniform distribution of MWCNTs in polymer, metal or ceramic matrix which in turn require the formation of specific interfaces between nanotube surface and composite matrix. The optimization of nanotube concentration in composite depending on MWCNT diameter distribution influencing percolation threshold are also crucially important to provide desirable properties. The analysis of the properties of MWCNT based composites leads to conclusion that for every type of composite specific optimal type of nanotubes is required. This paper reviews the synthesis of MWCNTs using different methods especially focusing on their structure and properties (mechanical, electrical and chemical). Various parameters influencing the MWCNT growth and properties along with post synthesis treatments influencing the nanotube structure and surface composition are also discussed.