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Nanomaterials 2016, 6(2), 29;

Simultaneous Reduction and Functionalization of Graphene Oxide by 4-Hydrazinobenzenesulfonic Acid for Polymer Nanocomposites

School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China
Key Laboratory for Advanced Materials Processing Technology, Ministry of Education, Beijing 100084, China
Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China
Author to whom correspondence should be addressed.
Academic Editors: Hermenegildo García and Thomas Nann
Received: 17 December 2015 / Revised: 13 January 2016 / Accepted: 26 January 2016 / Published: 4 February 2016
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Graphene oxide (GO) was functionalized and reduced simultaneously by a new reductant, 4-hydrazinobenzenesulfonic acid (HBS), with a one-step and environmentally friendly process. The hydrophilic sulfonic acid group in HBS was grafted onto the surface of GO through a covalent bond. The successful preparation of HBS reduced GO (HBS-rGO) was testified by scanning electron microscope (SEM), X-ray diffraction (XRD), Raman spectroscopy, Fourier transform infrared spectra (FTIR), X-ray photoelectron spectroscopic (XPS) and thermogravimetric analysis (TGA). The interlayer space of HBS-rGO was increased to 1.478 nm from 0.751 nm for GO, resulting in a subdued Van der Waals’ force between layers and less possibility to form aggregations. The aqueous dispersibility of graphene was improved to 13.49 mg/mL from 0.58 mg/mL after the functionalization. The viscosity of the epoxy resin based HBS-rGO composite could be regulated by an adjustment of the content of HBS-rGO. This study provides a new and applicable approach for the preparation of hydrophilic functionalized graphene, and makes it possible for the application of graphene in some functional polymer nanocomposites, such as specialty water-based coatings. View Full-Text
Keywords: graphene; functionalization; reduction; nanocomposite graphene; functionalization; reduction; nanocomposite

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Qiao, S.-J.; Xu, X.-N.; Qiu, Y.; Xiao, H.-C.; Zhu, Y.-F. Simultaneous Reduction and Functionalization of Graphene Oxide by 4-Hydrazinobenzenesulfonic Acid for Polymer Nanocomposites. Nanomaterials 2016, 6, 29.

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