3D scaffolds from vertically aligned carbon nanotubes/poly(methyl methacrylate) composites via atom transfer radical polymerization
authors Tebikachew, B; Magina, S; Mata, D; Oliveira, FJ; Silva, RF; Barros-Timmons, A
nationality International
journal MATERIALS CHEMISTRY AND PHYSICS
author keywords Composite materials; Chemical synthesis; X-ray photo-emission spectroscopy (XPS); Deformation
keywords NANOTUBES; FUNCTIONALIZATION; NANOFIBERS
abstract Vertically aligned carbon nanotubes (VACNTs) synthesized by Thermal Chemical Vapour Deposition (TCVD) were modified using an Ar:O-2 (97:3) plasma to generate oxygen-containing functional groups on the surface for subsequent modification. X-ray photo-emission spectroscopy (XPS) and micro-Raman analyses confirmed the grafting of those functional groups onto the surface of the nanotubes as well as the removal of amorphous carbon produced and deposited on the VACNT forests during the CVD process. The plasma treated VACNT forests were further modified with 2-bromo-2-methylpropionyl bromide, an atom transfer radical polymerization (ATRP) initiator, to grow poly(methyl methacrylate) (PMMA) chains from the forests via ATRP. Scanning transmission electron microscopy (STEM) of the ensuing VACNT/PMMA composites confirmed the coating of the nanotube forests with the PMMA polymer. 3D scaffolds of polymeric composites with honeycomb like structure were then obtained. Compressive tests have shown that the VACNT/PMMA composite has higher compressive strength than the pristine forest. (C) 2014 Elsevier B.V. All rights reserved.
publisher ELSEVIER SCIENCE SA
issn 0254-0584
year published 2015
volume 149
beginning page 378
ending page 384
digital object identifier (doi) 10.1016/j.matchemphys.2014.10.032
web of science category Materials Science, Multidisciplinary
subject category Materials Science
unique article identifier WOS:000347576900052
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journal impact factor 2.210
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