Microwave-induced rapid nanocomposite synthesis using dispersed single-wall carbon nanotubes as the nuclei

Document Type

Article

Publication Date

3-1-2009

Abstract

Single-wall carbon nanotubes (SWNTs) provide a reactive environment in presence of microwave radiation because they absorb the energy that leads to fast, direct heating. This makes composite formation in a microwave reactor highly feasible where the SWNTs serve as the nuclei for polymerization. In this article, we demonstrate rapid, in situ synthesis of poly(methyl methacrylate) (PMMA) and polyvinylpyrrolidone (PVP) nanocomposites using their respective monomers. The key to their success was the use of the highly dispersible SWNTs, which had strong interactions with the monomer and the polymer. Rapid synthesis within a few minutes was possible, which led to remarkable nano-scale dispersion of nanotubes in polymer matrix by encapsulation of the already dispersed SWNTs before the latter could agglomerate. The molecular weight and polydispersity of the polymers remained unchanged in the presence of the SWNTs. The addition of 0.5 wt% SWNT to PMMA enhanced its thermal stability (as measured by the initial degradation temperature) by 37 °C and the hardness by around 50%. On the other hand, with the addition of up to 4 wt% SWNT, the PVP showed no enhancement in thermal stability but its hardness increased by 250-300%. Finally, this technique is practical because it reduces time, cost, and energy requirements. © 2009 Springer Science+Business Media, LLC.

Identifier

60449114784 (Scopus)

Publication Title

Journal of Materials Science

External Full Text Location

https://doi.org/10.1007/s10853-009-3259-4

e-ISSN

15734803

ISSN

00222461

First Page

1245

Last Page

1250

Issue

5

Volume

44

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