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    Single-wall carbon nanotubes-chitosan nanocomposites: Surface wettability, mechanical and thermal propertiesEinwand-Kohlenstoffnanorohren-Chitosan-Nanokomposite: Benetzbarkeit der Oberflachen, mechanische und thermodynamische Eigenschaften

    Year: 2021

    Journal: Materialwiss. Werkstofftech., Volume 52, APR, page 400–408

    Authors: Rodrigues, M. A. V.; Horn, M. M.; Martins, V. C. A.; Plepis, A. M. G.

    Organizations: Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior - Brasil (CAPES) [001]; FAPESP [2010/19417-0]

    Keywords: Chitosan; carbon nanotubes; nanocomposites; nanofiller; films

    Functionalized single-wall carbon nanotubes (f-SWCN) are dispersed in chitosan films by self-assembly of both components in aqueous media. This carbon form is a promising nanofiller to achieve nanocomposites with refined thermal, mechanical and surface features. In this study, we investigated the influence of functionalized single-wall carbon nanotubes concentration on the resulting properties of the nanocomposites structures. Functionalized single-wall carbon nanotubes are dispersed on a molecular scale in the polymeric matrix due to electrostatic interactions between both components. The thermal and mechanical properties have been characterized by thermogravimetric analysis and dynamic mechanical analysis, respectively, while their wettability is studied by water contact angle measurements. Mechanical resistance of the films is improved up to 18 % with the addition of functionalized single-wall carbon nanotubes, but the thermal stability is expressively reduced. A decrease in the surface hydrophobicity of 25 % is obtained after the inclusion of the nanofiller.
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