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Carboxylic-acid functionalized multiwall carbon nanotubes (MWCNT-COOH) were first modified by (CH3O)3Si(CH2)3SO3H by an esterification reaction of the carboxylic-acid group with a methoxy group, then by hydrolyzing N,N-di(2-hydroxyethoxy)ethyl octadecylamine by an ion exchange reaction to form a quaternary ammonium salt as a soft shell of the MWCNTs. The modified MWCNTs had a larger diameter than...
A multi-wall carbon nanotube derivative was obtained using hydrogen bonding and a steric effect with a pluronic copolymer. The pluronic copolymer content is 75.5wt.% corresponding to a dense surface coverage of one modifying molecule per 390 carbon atoms of the nanotube. The material is a waxy solid at room temperature which melts and behaves like a liquid at 45°C.
Four exfoliated graphite (EG) samples with exfoliation volume ranging from 102.6 to 267.7 mL/g were prepared. The volume of worm-like particles before sorption was estimated by analyzing the area occupied by worm-like particles in slices cut from the EG block formed using paraffin. The results show that both the volume in worm-like particles, V n , and that among them, V m , increase...
Exfoliated graphite (EG) was prepared from graphite intercalation compounds (GICs) synthesized electrochemically with different electricity consumption from 10.83 to 40.00 A h/kg. Effects of electricity consumption on the synthesis of GICs and of exfoliation temperature on different parameters of EG, i.e. exfoliation volume, volatile content, specific surface area and pore volume measured by mercury...
The adsorption of polar methy-ethyl-ketone (MEK) and non-polar benzene vapors on viscose rayon-based activated carbon fiber (ACF) was investigated. The pore texture and surface composition of ACF were characterized by nitrogen adsorption at 77 K and X-ray photoelectron spectroscopy (XPS), respectively. Gas adsorption on the samples was measured by the gravimetric method and the Dubinin-Radushkevich...
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