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Graphite oxide platelets functionalized by poly(ionic liquid) brushes and their chemical reduction

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Abstract

In this paper, graphite oxide (GO) platelets functionalized by poly(ionic liquid) brushes were prepared by surface-initiated atom transfer radical polymerization (SI-ATRP). The chemical reduction of these functionalized platelets was also investigated. The functionalized platelets and their reduced products were characterized and confirmed by Fourier transform infrared spectroscopy, thermogravimetric analysis, ζ potential measurements, four-probe electrical measurements, and high-resolution transmission electron microscopy. Results demonstrated that the poly(ionic liquid) brushes could be grafted from the GO surface by SI-ATRP. The surface charges of the GO platelets surface transformed from negative to positive. Upon reduction by hydrazine, the functionalized platelets were partially reduced, as suggested by the observation that reduced GO exhibits electrical conductivity three magnitudes higher than that of original GO. Although partially reduced GO platelets were not as conductive as reduced GO without functionalization, they can be homogenously dispersed in water due to the presence of poly(ionic liquids) brushes.

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Acknowledgments

This study was financially supported by the National Natural Science Foundation of China (Grant Nos. 50903070, 51273178 and 21274131), the Natural Science Foundation of Zhejiang Province (LY12E03004), Science and Technology Innovative Research Team of Zhejiang Province (No. 2009R50010), and Qianjiang talent project of Zhejiang Province of China (2010R10018). The authors also thank Prof. Xianghong Huang and Prof. Gang Qiao in Zhejiang Shuren University for the help on testing CO2 absorption abilities of GO and its derivatives.

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Authors and Affiliations

  1. College of Chemical Engineering and Materials Science, Zhejiang University of Technology, Hangzhou, 310014, People’s Republic of China

    Jintao Yang, Xiaohui Yan, Feng Chen, Ping Fan & Mingqiang Zhong

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  1. Jintao Yang
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  2. Xiaohui Yan
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  3. Feng Chen
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  4. Ping Fan
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  5. Mingqiang Zhong
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Correspondence to Jintao Yang.

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11051_2012_1383_MOESM1_ESM.doc

Typical AFM images of GO, GO-P[MATMA][BF4] and RGO-P[MATMA][BF4] (Fig. S1). CO2 absorption of the original GO, GO-P[MATMA][BF4], RGO-P[MATMA][BF4] and RGO platelets without any surface modification (Fig. S2). (DOC 3306 kb)

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Yang, J., Yan, X., Chen, F. et al. Graphite oxide platelets functionalized by poly(ionic liquid) brushes and their chemical reduction. J Nanopart Res 15, 1383 (2013). https://doi.org/10.1007/s11051-012-1383-6

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  • DOI: https://doi.org/10.1007/s11051-012-1383-6

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