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The catalytic performance of multi-walled carbon nanotubes (MWCNTs) modified by iron oxide has been investigated for oxidative dehydrogenation of ethylbenzene in an integral fixed-bed reactor conventionally-heated and under microwave-assisted conditions. The morphology and microstructural characteristics of the obtained composites before and after the catalytic reaction were characterized by transmission...
A sub-micrometer size beam (0.5μm diameter) in a position-resolved small angle X-ray scattering set-up (μSAXS) has been used for the characterization of chemically activated carbon fibers (ACF). These materials have been prepared from isotropic carbon fibers (pitch carbon fibers) and anisotropic carbon fibers (PAN-based carbon fibers) by chemical activation with KOH and NaOH. The μSAXS experimental...
Here we present a new approach to extremely large polycyclic aromatic hydrocarbons (PAHS) based on a cyclodehydrogenation method for polyphenylene dendrimers. These polyphenylene dendrimers are synthesized by repeated Diels-Alder reactions of ethynyl-substituted tetraphenylcyclopentadienones (1b) to the tetraethynylbiphenyl (2) core. Molecular mechanics and molecular dynamics calculations revealed...
Commercially surface-treated HT carbon fibres were coated with phenolic resin in order to reduce the adhesion of the phenolic resin matrix to the fibre surface. Unidirectional (UD) composites were fabricated using uncoated and coated fibres and a standard phenolic resin as matrix: the fibre volume fraction of the green composites was 60 vol%. The composites were carbonized at 1000 C and treated at...
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