Kyu Hwan Lee

A Study of Mechanical Interfacial Properties of Carbon Nanotube on Carbon Fiber/Epoxy Resin Composites

Department of Materials Science and Engineering, Pusan National Unibersity, Busan 609-735, Korea(Received October 7, 2013 ; revised October 21, 2013 ; accepted October 23, 2013)AbstractIn this work, the grow of carbon nanotube (CNT) on carbon fiber was introduced on PAN-based carbonfibers for the enhancement of mechanical interfacial strength of carbon fibers-reinforced composites. Thesurface properties of carbon fibers were determined by scanning electron microscopy (SEM) and mechanicalinterfacial properties of the composites were studied by interlaminar shear strength (ILSS). From the results,it was found that the mechanical interfacial properties of CNT-carbon fibers-reinforced composites (CNT-CFRPs) enhanced with decreasing the CNT content. The excessive CNT content can lead the failure dueto the interfacial separation between fibers and matrices in this system. In conclusion, the optimum CNTcontent on carbon fiber surfaces can be a key factor to determine the mechanical interfacial properties ofthe CNT-CFRPs.

Comparison of the toluene adsorption capacities of variouscarbon nanostructures

A novel experimental set-up allowing quantitative determination of the adsorption capacity of gas molecules on a surface under high-vacuum conditions is introduced. Using this system, the toluene adsorption capacities of various carbon nanostructures were determined. We found that for a give surface area, the adsorption capacities of toluene of multi-walled carbon nanotubes and nanodiamonds were higher than that of activated carbon, which is widely used as an adsorbent of volatile organic compounds. The adsorption of toluene was reversible at room temperature.