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Fabrication of electrically conductive graphene/polystyrene composites via a combination of latex and layer-by-layer assembly approaches

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Abstract

Due to its excellent physical properties, graphene acting as reinforcing fillers has attracted intense interests. To achieve a controlled distribution, the formation of a conductive network composed of graphene sheets within polymer matrix is of critical importance. In this work, polystyrene (PS) microspheres wrapped by graphene oxide (GO) sheets were prepared via layer-by-layer (LBL) assembly of oppositely charged GO sheets onto PS microspheres. The deposited GO was then reduced, and the composite films with a graphene conductive network were prepared by hot pressing. The morphology of graphene conductive network was studied, and the thermal and electrical properties of the composite films were measured. The as-prepared composites showed an improved thermal stability as well as electrical conductivity with a percolation threshold as low as 0.2 vol%. The combination of latex technology and LBL self-assembly method thus demonstrated an efficient and facile approach to fabricate electrically conductive graphene/polymer composites.

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ACKNOWLEDGMENTS

The authors are grateful for the financial support from the National Natural Science Foundation of China (Grant No. 51125011) and “Shu Guang” project (Grant No. 09SG02) supported by Shanghai Municipal Education Commission and Shanghai Education Development Foundation.

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Correspondence to Tianxi Liu.

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Fan, W., Zhang, C., Tjiu, W.W. et al. Fabrication of electrically conductive graphene/polystyrene composites via a combination of latex and layer-by-layer assembly approaches. Journal of Materials Research 28, 611–619 (2013). https://doi.org/10.1557/jmr.2012.437

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  • DOI: https://doi.org/10.1557/jmr.2012.437

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