Clay-Graphene Nanoplatelets Functional Conducting Composites
authors Ruiz-Hitzky, E; Sobral, MMC; Gomez-Aviles, A; Nunes, C; Ruiz-Garcia, C; Ferreira, P; Aranda, P
nationality International
journal ADVANCED FUNCTIONAL MATERIALS
keywords MAYA BLUE; TEMPLATED SYNTHESIS; SUPPORTED GRAPHENE; PORE STRUCTURE; POLYMER-CLAY; NANOCOMPOSITES; SEPIOLITE; GRAPHITE; OXIDE; BIONANOCOMPOSITES
abstract An approach to functionalize graphene-based materials has been developed by assembling graphene nanoplatelets (GNP) with clay minerals. Under convenient sonomechanical treatment, clay-GNP mixtures may produce very stable water dispersions in particular using sepiolite fibrous clay. While in the absence of clay a rapid decantation of GNP in water is observed, in the presence of sepiolite the resulting dispersions remain stable during months without syneresis effects. Rigid but flexible self-supported films are easily obtained by filtering of these dispersions. As the electrical percolation threshold corresponds to sepiolite/GNP composites of 0.5:1 in weight, doping these systems with multiwalled carbon nanotubes (MWCNTs) significantly enhances their electrical conductivity. The particular microporosity of the sepiolite component allows interactions with molecules, such as organic dyes, as well as polymers, such as biopolymers, opening the way to functional materials for advanced applications due to their inherent conductivity afforded by the GNP and MWCNTs carbonaceous components. In fact, using very small amount of MWCNT together with GNP can obtain composites with significant electrical conductivity, maintaining the enhanced mechanical properties, at a lower cost.
publisher WILEY-V C H VERLAG GMBH
issn 1616-301X
year published 2016
volume 26
issue 41
beginning page 7394
ending page 7405
digital object identifier (doi) 10.1002/adfm.201603103
web of science category Chemistry, Multidisciplinary; Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Physics, Applied; Physics, Condensed Matter
subject category Chemistry; Science & Technology - Other Topics; Materials Science; Physics
unique article identifier WOS:000387545500003
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journal analysis (jcr 2017):
journal impact factor 13.325
5 year journal impact factor 13.274
category normalized journal impact factor percentile 94.154
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