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Biocompatibility tests were performed on vertically-aligned multi-walled carbon nanotube (MWCNT) films produced by microwave plasma chemical vapor deposition on titanium substrates with iron (Fe) and nickel (Ni) as catalysts. The cell adhesion and morphology of L-929 mouse fibroblast cells were studied by high resolution scanning electron microscopy, after up to 7days incubation periods. Cell viability...
An activated carbon monolith (ACM) with a high helium adsorption/desorption capacity, high density, low pressure drop, low thermal expansion and good mechanical properties was prepared and applied successfully in a helium adsorption compressor as a part of a 4.5K sorption cooler. The activated carbon (AC) used in the monolith preparation was selected from a series of ACs prepared from an anthracite...
We have prepared and evaluated the performance of natural graphite (NG)/agglomerated carbon nanotubes (ACNTs) composite materials for future mechanical dampening devices. The mechanical performance of a compressed mixture of NG and ACNTs was examined over the pressure range of 30–300MPa. NG–ACNT composite materials showed improved performance over the ACNT materials alone. Nanocomposites containing...
Mixtures of carbon nanotubes (CNTs), including multi-wall CNTs and single-wall CNTs, and polyoxyethylene(12) tridecyl ether (POETE), a nonionic surfactant and a fluid at room temperature, became gels after mechanical grinding. The heavily entangled multi-wall or single-wall CNTs debundled during the grinding and dispersed with fewer bundles in POETE. The mechanism for the gel formation was studied...
Carbon nanotube grafted primary reinforcing fibres are under development for a new generation of hierarchical composites. Pure and nitrogen-doped multi-walled carbon nanotubes (MWCNTs) were grown on silica fibres using the injection chemical vapour deposition method. The morphology and size of the nanotubes were controlled by varying the growth time. The surface structure of the silica fibres after...
To enhance As(V) removal, an activated carbon fiber (ACF) based adsorbent was fabricated by impregnation of nano-sized magnetite to the surface of ACF with chitosan as the coating support. The As(V) adsorption capacity of the modified ACF (MACF) was approximately eight times of that of the raw ACF (RACF). Even at As(V) concentrations lower than 10μgL −1 , the MACF exhibited a considerably...
The electric charge of diesel particulate matter (DPM) from a corona discharge device is measured for understanding the electrical characteristics of the DPM; an electrostatic precipitator (ESP) is employed for trapping DPM. Exhaust gas from a diesel engine is sampled by isokinetic sampling, and DPM contained in the gas is charged by negative corona discharge. The charged DPM is collected by a Faraday...
Thermophysical properties of carbon materials derived from microcrystalline cellulose have been studied under vacuum and compared with earlier measurements conducted under nitrogen to better understand the influence of porosity, composition, microstructure, and atmosphere effects. The effective thermal conductivity in vacuum is lower than that observed in nitrogen primarily due to the conductivity...
N-doped multi-layered graphene sheets were synthesized in large scale by the method of direct current arc-discharge between pure graphite rods. For the use of NH 3 as one of the buffer gas, the multi-layered graphene sheets were doped with N without the addition of other nitrogen source. The product so obtained has been characterized by transmission electron microscopy, Raman spectroscopy,...
Compressed expanded natural graphite (CENG) matrices with different densities were used to increase the thermal property of paraffin wax. To predict the performance of the paraffin wax/CENG composites as a thermal energy storage system, their structure, thermal conductivity and latent heat were characterized. Results indicated that the thermal conductivity of the composites can be 28–180× that of...
Theoretical limits of the hydrogen adsorption in carbon nanospaces are modeled using Monte Carlo simulations. A detailed analysis of storage capacity of slit pores has been performed as a function of the pore size, gas pressure (up to 100bars) and temperature of adsorption (77 and 298K). The H 2 –slit wall interaction has been modeled assuming energies of adsorption ranging from 4.5kJ/mol...
Versatile adsorbents were prepared by modifying whetlerite carbon for intended application against both non-persistent and persistent chemical warfare agents. Whetlerite carbon was modified by impregnating with basic inorganic compounds such as sodium hydroxide, potassium carbonate, sodium carbonate, cesium carbonate, etc. and oxidizing inorganic compounds such as ammonium heptamolybdate, ceric ammonium...
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