Ag Ion Decoration for Surface Modifications of Multi-walled Carbon Nanotubes

Ag Ion Decoration for Surface Modifications of Multi-walled Carbon Nanotubes

Autor Travessa, Dilermando Nagle Autor UNIFESP Google Scholar
Silva, Fabio S. da Google Scholar
Cristovan, Fernando H. Autor UNIFESP Google Scholar
Jorge Junior, Alberto Moreira Google Scholar
Cardoso, Katia Regina Autor UNIFESP Google Scholar
Instituição Universidade Federal de São Paulo (UNIFESP)
Empresa Brasileira Aeronaut SA Embraer
Universidade Federal de São Carlos (UFSCar)
Resumo The production of high performance metal matrix composites depends on a proper design of the surface of the reinforcing phase, ensuring a good contact with a metal phase. in the present work, two Ag decorating procedures to modify the surface of multi-walled carbon nanotubes (MWCNT) were evaluated for further production of aluminum matrix composites. the procedures consisted in a two steps route based on acid oxidation of carbon nanotubes (CNT) followed by suspension in an Ag ion solution; and a single step route, based on the effect of n-dimethylformamide (DMF) as an activation agent of CNT surface, in presence of Ag ions. Transmission and scanning-transmission electron microscopy, Raman and Fourier-transformed infrared spectroscopy were employed in order to characterize the results. the two steps route resulted in Ag nano-particles homogeneously deposited over the CNT surface. the mechanism for the deposition is based on carboxyl and probably hydroxyl functional groups formed in the first step, acting as nucleation sites for Ag precipitation in the second step. the single step route resulted in the formation of sub-micrometric Ag particles heterogeneously mixed to CNT bundles.
Assunto carbon nanotubes
Ag decoration
acid refluxing
surface activation
Idioma Inglês
Data 2014-05-01
Publicado em Materials Research-ibero-american Journal of Materials. Sao Carlos: Univ Fed Sao Carlos, Dept Engenharia Materials, v. 17, n. 3, p. 687-693, 2014.
ISSN 1516-1439 (Sherpa/Romeo, fator de impacto)
Editor Univ Fed Sao Carlos, Dept Engenharia Materials
Extensão 687-693
Fonte http://dx.doi.org/10.1590/S1516-14392014005000026
Direito de acesso Acesso aberto Open Access
Tipo Artigo
Web of Science WOS:000338017600021
SciELO S1516-14392014005000026 (estatísticas na SciELO)
URI http://repositorio.unifesp.br/handle/11600/37698

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