Percolating conductive networks in multiwall carbon nanotube-filled polymeric nanocomposites: towards scalable high-conductivity applications of disordered systems
- 9 April 2019
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Nanoscale
- Vol. 11 (17), 8565-8578
- https://doi.org/10.1039/c9nr00216b
Abstract
Disordered polymeric composite systems ordinarily exhibit poor bulk electronic transport properties, restricting their use to low-conductivity applications. In this work, highly electroconductive multi-walled carbon nanotube (MWCNT)/polyurethane (PU) nanocomposites were assembled via an aqueous solvent-blending method. Low percolation thresholds of 0.001 wt% and 0.093 wt% were obtained using pristine MWCNTs (P-MWCNTs) and mildly oxidized MWCNTs (O-MWCNTs), respectively. Corresponding critical values of dimensionality of 2.067 ± 0.094 and 2.304 ± 0.114 were calculated for P-MWCNT/PU and O-MWCNT/PU composites, respectively, strongly suggesting the formation of three-dimensional percolating conductive networks permeating the PU host matrix above the percolation threshold. Saturated direct current conductivities as high as 839 ± 72 S cm−1 were measured for O-MWCNT/PU composites at a filler-loading of 30.9 wt%. MWCNT/PU composite surfaces functionalized with superhydrophobic perfluoroalkyl moieties via chemical vapor deposition of (tridecafluoro-1,1,2,2-tetrahydrooctyl)trichlorosilane exhibited sessile contact angles as high as 154° without adversely affecting electroconductivity.Keywords
Funding Information
- Welch Foundation (E-1728)
- National Science Foundation (ECCS-1240510)
This publication has 84 references indexed in Scilit:
- 25th Anniversary Article: Organic Field‐Effect Transistors: The Path Beyond Amorphous SiliconAdvanced Materials, 2014
- Long and winding polymeric roadsNature Materials, 2013
- Polymer/carbon based composites as electromagnetic interference (EMI) shielding materialsMaterials Science and Engineering: R: Reports, 2013
- Siloxane-Terminated Solubilizing Side Chains: Bringing Conjugated Polymer Backbones Closer and Boosting Hole Mobilities in Thin-Film TransistorsJournal of the American Chemical Society, 2011
- High‐Performance Ambipolar Diketopyrrolopyrrole‐Thieno[3,2‐b]thiophene Copolymer Field‐Effect Transistors with Balanced Hole and Electron MobilitiesAdvanced Materials, 2011
- Indacenodithiophene Semiconducting Polymers for High-Performance, Air-Stable TransistorsJournal of the American Chemical Society, 2010
- Small-molecule-directed nanoparticle assembly towards stimuli-responsive nanocompositesNature Materials, 2009
- Model interfacesNature Materials, 2007
- Short shaped copper fibers in an epoxy matrix: Their role in a multifunctional compositeComposites Science and Technology, 2006
- Helical microtubules of graphitic carbonNature, 1991