Carbon Nanotubes and Related Structures: Synthesis
The present study evaluates the mechanical performance of a Hot Mix Asphalt – Type II (HMA-2) modified with carbon nanotubes and carbon nanofibers (CNTF). CNTF were made by means the Catalytic Vapor Deposition (CVD) technique at 700° C using a Nickel, Copper and Aluminum (NiCuAl) catalyst with a Cu/Ni molar relation of 0,33. In order to properly assess HMA-2 performance, three different mixtures were analyzed: 1) HMA-2 modified with purified CNTF; 2) HMA-2 modified with non-purified CNTF and, 3) a Conventional HMA-2 (control). Samples manufactured in accordance with the Marshall Mix Design were tested in the laboratory to study rutting, resilient modulus (Mr) and fatigue. In addition to the aforementioned dynamic characterization, the effect of CNTF purification on the asphalt mixture’s mechanical properties was analyzed. In short, a comparative study was designed to determine whether or not CNTF should be purified before introduction into the HMA-2. This investigation responds to the growing demand for economical materials capable of withstanding traffic loads while simultaneously enhancing pavement durability and mechanical properties. Although purified CNTF increased HMA-2 stiffness and elastic modulus, non-purified CNTF increased the asphalt mixture’s elastic modulus without considerable increases in stiffness. Thus, the latter modification is deemed to help address fatigue related issues and improve the long-term durability of flexible pavements.
Carbon nanotubes Warren Thesis | Nanocomposite | X …
Doctoral thesis about carbon nanotube fillers in polymer ..
Yusuke Nakanishi (a Ph.D student) has won The Chemical Society of Japan (CSJ) Student Presentation Award on "Template synthesis of diamatane chains inside carbon nanotubes from bridgehead-halogenated diamantane" during The 95th CSJ Annual Meeting in March, 2015.
functionalization of single-walled carbon nanotubes ..
The two Ph.D students won "Excellent Poster Award" in The 5th A3 symposium on emerging materials:
Wang Qing on
"Fabrication and in-situ TEM characterization of freestanding graphene nanoribbons devices"
Yusuke Nakanishi on
"Thermal Annealing of Halogenated-Diamondoids inside Carbon Nanotubes: Towards One-dimensional Diamond Crystal Formation"
(October 23th, 2014).
Synthesis, doping and functionalization of carbon nanotubes
421, 39 (2013)
Rapid Single-Stage Separation of Micrometer-Long and High-Purity Semiconducting Carbon Nanotubes by Gel Filtration
Boanerges Thendie, Yasumitsu Miyata, Ryo Kitaura, Yuhei Miyauchi, Kazunari Matsuda, and Hisanori Shinohara