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Electrically conductive polyethylene terephthalate/graphene nanocomposites prepared by melt compounding |
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| Authors: | Hao-Bin Zhang Qing Yan Ji-Wen Wang Guo-Ying Ji |
| Affiliation: | a Ningbo Key Laboratory of Polymer Materials, Division of Polymers and Composites, Ningbo Institute of Material Technology & Engineering, Chinese Academy of Sciences, Ningbo 315201, China b Beijing Key Laboratory on Preparation and Processing of Novel Polymeric Materials, Department of Polymer Engineering, College of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China |
| Abstract: | Graphene nanosheets were prepared by complete oxidation of pristine graphite followed by thermal exfoliation and reduction. Polyethylene terephthalate (PET)/graphene nanocomposites were prepared by melt compounding. Transmission electron microscopy observation indicated that graphene nanosheets exhibited a uniform dispersion in PET matrix. The incorporation of graphene greatly improved the electrical conductivity of PET, resulting in a sharp transition from electrical insulator to semiconductor with a low percolation threshold of 0.47 vol.%. A high electrical conductivity of 2.11 S/m was achieved with only 3.0 vol.% of graphene. The low percolation threshold and superior electrical conductivity are attributed to the high aspect ratio, large specific surface area and uniform dispersion of the graphene nanosheets in PET matrix. |
| Keywords: | Graphene Electrical conductivity Melt compounding |
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