A Facile and Green Method to Prepare Conductive Carbon-coated Polymer Microspheres Using Supercritical Carbon Dioxide

We introduce a facile method to synthesize a new class of core–shell microspheres composed of resin core particles coated with various carbon materials. The core–shell microspheres were prepared by a one-pot process in which carbon materials such as edge-exfoliated graphite and expanded graphite wer...

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Bibliographic Details
Published in:Chemistry letters 2016-01, Vol.45 (1), p.92-94
Main Authors: Nozato, Shoji, K Mallik, Abul, Satoh, Eisaku, Fukuda, Rika, S Ganapathy, Hullathy, Kuwahara, Yutaka, Takafuji, Makoto, Ihara, Hirotaka
Format: Article
Language:English
Subjects:
Adhesion
Carbon
Carbon dioxide
Electrical resistivity
Graphite
Microspheres
Polystyrene resins
Resistivity
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Summary:We introduce a facile method to synthesize a new class of core–shell microspheres composed of resin core particles coated with various carbon materials. The core–shell microspheres were prepared by a one-pot process in which carbon materials such as edge-exfoliated graphite and expanded graphite were dispersed together with core substrates like polystyrene and poly(styrene/2-hydroxyethyl methacrylate) spherical particles in supercritical carbon dioxide. The obtained microspheres were characterized by thermogravimetric analysis, Raman spectroscopy, and scanning electron microscopy. The results indicate that the carbon shells are tightly attached to the surface of the core substrates. Furthermore, because of excellent adhesion, the carbon-coated polymer particles exhibited extremely high electrical conductivity with particle resistance of less than 50 Ω cm despite the presence of an insulating polymeric core material.
ISSN:0366-7022
1348-0715
DOI:10.1246/cl.150937