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Homogeneous dispersion of high-conductive reduced graphene oxide sheets for polymethylmethacrylate nanocomposites

Published online by Cambridge University Press:  03 March 2014

Xiaopeng Zeng ,
Jingjing Yang ,
Lizhen Zhang ,
Lijuan Chen  and
Wenxia Yuan
Xiaopeng Zeng
Affiliation:
Department of Chemistry, School of Chemistry and Biological Engineering, University of Science and Technology Beijing, Beijing 100083, China
Jingjing Yang
Affiliation:
Department of Chemistry, School of Chemistry and Biological Engineering, University of Science and Technology Beijing, Beijing 100083, China
Lizhen Zhang
Affiliation:
Department of Chemistry, School of Chemistry and Biological Engineering, University of Science and Technology Beijing, Beijing 100083, China
Lijuan Chen
Affiliation:
Department of Chemistry, School of Chemistry and Biological Engineering, University of Science and Technology Beijing, Beijing 100083, China
Wenxia Yuan*
Affiliation:
Department of Chemistry, School of Chemistry and Biological Engineering, University of Science and Technology Beijing, Beijing 100083, China
*
a) Author to whom correspondence should be addressed. Electronic mail: wenxiayuan20@aliyun.com
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Abstract

The high cohesive interaction between reduced graphene oxide (RGO) sheets usually makes them difficult to disperse, which limits their utilization in achieving effective hybridization with polymers. We report here a new two-step route for preparing non-aggregated and high-conductive RGO powders. Graphene oxide precursor was first reduced by hydrazine hydrate in presence of a thermal unstable surfactant of cetyltrimethylammonium chloride (CTAC). Then a thermal annealing process under H2/Ar atmosphere was further used to remove the non-conductive CTAC molecules. The prepared RGO powder exhibited an electrical conductivity of 2.23 × 104 S m−1 – about ten times higher than the one (N-RGO) simply reduced by hydrazine hydrate. After incorporating into polymethylmethacrylate with a 5 wt% loading, the composite showed a conductivity of 4.11 S m−1, which was 60 times as high as that of the same composite based on N-RGO powder. The addition and subsequent removal of CTAC molecules is an effective method for preparing non-aggregated and highly conductive graphene powder and obtaining good incorporation into polymer matrices.

Keywords

graphenepolymethylmethacrylateconductivitynanocompositesX-ray diffraction

Information

Type
Technical Articles
Information
Powder Diffraction , Volume 29 , Issue 3 , September 2014 , pp. 241 - 247
Copyright
Copyright © International Centre for Diffraction Data 2014 

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