Issue 14, 2014

Conductive polymer nanocomposites with hierarchical multi-scale structures via self-assembly of carbon-nanotubes on graphene on polymer-microspheres

Abstract

A novel and highly conductive 3-dimensional (3D) hierarchical multi-scale structure is formed by a new, simple, facile, and water-based method that enables practical production of conductive carbon nanofiller/polymer composites. More specifically, the π–π interaction between CNTs and graphene oxide (GO) is exploited to disperse conductive but non-polar CNTs with amphiphilic GO sheets to form a stable aqueous colloidal solution. Aqueous-dispersible latex–polystyrene microspheres are then added to enable the self-assembly processes of anchoring CNTs on GO and wrapping microspheres with GO-stabilized CNTs for the formation of an intriguing 3D hierarchical multi-scale structure. During this process, GO is reduced to conductive reduced-graphene oxide (RGO). The resultant RGO sheets act as “nano-walls” to prevent CNTs from randomly diffusing into the polymer bulk during thermal pressing of RGO–CNT/microspheres, which results in the formation of a 3D foam-like network of RGO–CNTs with high quality. The resultant composite with such a structure gives an ultra-low percolation threshold (0.03 vol% RGO–CNTs) and a reasonably high conductivity (153 S m−1 at 4 vol% RGO–CNTs), which could satisfy various applications requiring both transparency and electrical conduction characteristics (e.g. transparent antistatic coatings, capacitive touch-screens, and transparent electronic devices).

Graphical abstract: Conductive polymer nanocomposites with hierarchical multi-scale structures via self-assembly of carbon-nanotubes on graphene on polymer-microspheres

Supplementary files

Article information

Article type
Paper
Submitted
14 Nov 2013
Accepted
22 Mar 2014
First published
26 Mar 2014

Nanoscale, 2014,6, 7877-7888

Author version available

Conductive polymer nanocomposites with hierarchical multi-scale structures via self-assembly of carbon-nanotubes on graphene on polymer-microspheres

C. Tang, G. Long, X. Hu, K. Wong, W. Lau, M. Fan, J. Mei, T. Xu, B. Wang and D. Hui, Nanoscale, 2014, 6, 7877 DOI: 10.1039/C3NR06056J

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