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Role of poly(N-vinyl-2-pyrrolidone) as stabilizer for dispersion of graphene via hydrophobic interaction

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Abstract

Stable aqueous dispersion of chemically reduced graphene is simply obtained by reducing GO solution in the presence of PVP. Prepared aqueous graphene dispersion was optically clear and stable for several months without any aggregation or precipitation. Graphene/PVP assembly shows decreased optical transmittance (47% at 600 nm) and quenching of photoluminescence of parent GO (8.5% at 375 nm) after reduction. Raman analysis confirms that reduction of GO to graphene is efficient in the presence of PVP. Both DLS and AFM analysis confirm that there is efficient and overall interaction between chemically reduced graphene plates and PVP chains. Hydrophobic interaction between graphene and PVP might be responsible for this solubilization of chemically reduced graphene in solution.

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Acknowledgements

This research was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science, and Technology (2010-0004806) and supported by a grant from the Academic Research Program of Chungju National University in 2010. We also specially thank Ms. Hee Won Seo in Research Support Team (KAIST, Central Research Instrumental Facility) for her kind help with Raman experiment.

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  1. Department of Polymer Science and Engineering, Chungju National University, Chungju, Chungbuk, 380-702, Republic of Korea

    Seyoung Yoon & Insik In

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  1. Seyoung Yoon
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  2. Insik In
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Correspondence to Insik In.

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Yoon, S., In, I. Role of poly(N-vinyl-2-pyrrolidone) as stabilizer for dispersion of graphene via hydrophobic interaction. J Mater Sci 46, 1316–1321 (2011). https://doi.org/10.1007/s10853-010-4917-2

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  • DOI: https://doi.org/10.1007/s10853-010-4917-2

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