INVESTIGADORES
GOYANES Silvia Nair
artículos
Título:
Influence of the electronic distribution of polymers in the spatial conformation of polymer grafted carbon nanotube composites .
Autor/es:
H. GARATE; A. DE FALCO; M.S. MORENO; M.L. FASCIO; S. GOYANES; N.B. D'ACCORSO
Revista:
PHYSICA B - CONDENSED MATTER
Editorial:
ELSEVIER SCIENCE BV
Referencias:
Lugar: Amsterdam; Año: 2012 vol. 407 p. 3184 - 3187
ISSN:
0921-4526
Resumen:
In thisworkwereportthecovalentfunctionalizationofmultiwalledcarbonnanotubes(MWCNTs)withpolyacrylonitrile(PAN)andpolyvinylpyridine(PVP)bythegraftfrommethod.Differencesintheelectronicdistributionofbothpolymersresultedindifferentinteractionbetweenpolymersandthenanotubes.ItwasfoundthatPVPchainswrappedthenanotubeswhilenanotubesfunctionalizedwithPAN presentedPANchainsformingamorphousentanglementsonthenanoscalelinkedtotheMWCNTs.DifferencesintheconformationbetweenbothpolymersandtheMWCNTscanbeattributedtointeractionsbetweenthearomaticgroupsinPVPandtheMWCNTsthrough pp stacking.Theabsenceof aromaticgroupsinthecaseofthePANchainsfavourstheinteractionbetweenthem.ThefunctionalizationefficiencywascharacterizedusingFouriertransforminfraredspectroscopy(FT-IR),thermogravimetricanalysis(TGA)andUVvisspectroscopy,whilemorphologicalchangeswerecharacterizedbyhighresolutiontransmissionelectronmicroscopy.
