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Title: Processable conductive graphene/polyethylene nanocomposites: Effects of graphene dispersion and polyethylene blending with oxidized polyethylene on rheology and microstructure

Abstract

Poor dispersion of graphene in non-polar polymer matrices creates composites with limited applications. A method to improve the dispersion of graphene in polyethylene (PE) via blending PE with oxidized PE (OPE) is examined. Graphene was produced by simultaneous thermal exfoliation and reduction of graphite oxide. Nanocomposites of graphene with PE as well as graphene with PE/OPE-blends were prepared by solvent blending. Improved dispersion of graphene in PE/OPE blends substantially decreases percolation from both rheological (0.3 vol%) and electrical (0.13 vol%) measurements compared to neat PE nanocomposites (1 and 0.29 vol%), respectively. A universal Brownian dispersion of graphene in polymers was concluded similar to that of nanotubes, following the Doi-Edwards theory. Micromechanical models, such as Mori-Tanaka and Halpin-Tsai models, modeled the mechanical properties of the nanocomposites. The nanocomposites microstructure, studied by small angle x-ray scattering, confirmed better dispersion of graphene at lower loadings and the formation of surface fractals in the blend/graphene nanocomposites; whereas only mass fractals were observed in neat PE/graphene nanocomposites.

Authors:
; ; ; ; ;
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
Argonne National Laboratory - Advanced Photon Source; Petroleum Institute; U.S. Army Research Laboratory - U.S. Army Research Office (ARO)
OSTI Identifier:
1373386
DOE Contract Number:  
AC02-06CH11357
Resource Type:
Journal Article
Resource Relation:
Journal Name: Polymer; Journal Volume: 98
Country of Publication:
United States
Language:
English
Subject:
Micromechanical models; Nanocomposites; Rheology; SAXS; graphene; polyethylene

Citation Formats

Iqbal, Muhammad Z., Abdala, Ahmed A., Mittal, Vikas, Seifert, Sӧnke, Herring, Andrew M., and Liberatore, Matthew W.. Processable conductive graphene/polyethylene nanocomposites: Effects of graphene dispersion and polyethylene blending with oxidized polyethylene on rheology and microstructure. United States: N. p., 2016. Web. doi:10.1016/j.polymer.2016.06.021.
Iqbal, Muhammad Z., Abdala, Ahmed A., Mittal, Vikas, Seifert, Sӧnke, Herring, Andrew M., & Liberatore, Matthew W.. Processable conductive graphene/polyethylene nanocomposites: Effects of graphene dispersion and polyethylene blending with oxidized polyethylene on rheology and microstructure. United States. doi:10.1016/j.polymer.2016.06.021.
Iqbal, Muhammad Z., Abdala, Ahmed A., Mittal, Vikas, Seifert, Sӧnke, Herring, Andrew M., and Liberatore, Matthew W.. Mon . "Processable conductive graphene/polyethylene nanocomposites: Effects of graphene dispersion and polyethylene blending with oxidized polyethylene on rheology and microstructure". United States. doi:10.1016/j.polymer.2016.06.021.
@article{osti_1373386,
title = {Processable conductive graphene/polyethylene nanocomposites: Effects of graphene dispersion and polyethylene blending with oxidized polyethylene on rheology and microstructure},
author = {Iqbal, Muhammad Z. and Abdala, Ahmed A. and Mittal, Vikas and Seifert, Sӧnke and Herring, Andrew M. and Liberatore, Matthew W.},
abstractNote = {Poor dispersion of graphene in non-polar polymer matrices creates composites with limited applications. A method to improve the dispersion of graphene in polyethylene (PE) via blending PE with oxidized PE (OPE) is examined. Graphene was produced by simultaneous thermal exfoliation and reduction of graphite oxide. Nanocomposites of graphene with PE as well as graphene with PE/OPE-blends were prepared by solvent blending. Improved dispersion of graphene in PE/OPE blends substantially decreases percolation from both rheological (0.3 vol%) and electrical (0.13 vol%) measurements compared to neat PE nanocomposites (1 and 0.29 vol%), respectively. A universal Brownian dispersion of graphene in polymers was concluded similar to that of nanotubes, following the Doi-Edwards theory. Micromechanical models, such as Mori-Tanaka and Halpin-Tsai models, modeled the mechanical properties of the nanocomposites. The nanocomposites microstructure, studied by small angle x-ray scattering, confirmed better dispersion of graphene at lower loadings and the formation of surface fractals in the blend/graphene nanocomposites; whereas only mass fractals were observed in neat PE/graphene nanocomposites.},
doi = {10.1016/j.polymer.2016.06.021},
journal = {Polymer},
number = ,
volume = 98,
place = {United States},
year = {Mon Aug 01 00:00:00 EDT 2016},
month = {Mon Aug 01 00:00:00 EDT 2016}
}