Simultaneous Reduction and Functionalization of Graphene Oxide by 4-Hydrazinobenzenesulfonic Acid for Polymer Nanocomposites.
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.
School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China. qiaosongjie19900627@hotmail.com.|Key Laboratory for Advanced Materials Processing Technology, Ministry of Education, Beijing 100084, China. qiaosongjie19900627@hotmail.com.
Song-Jie
SJ
Qiao
School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China. xvxiangnan@gmail.com.|Key Laboratory for Advanced Materials Processing Technology, Ministry of Education, Beijing 100084, China. xvxiangnan@gmail.com.
Xiang-Nan
XN
Xu
Key Laboratory for Advanced Materials Processing Technology, Ministry of Education, Beijing 100084, China. qiuyangdme@hotmail.com.|Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China. qiuyangdme@hotmail.com.
Yang
Y
Qiu
Key Laboratory for Advanced Materials Processing Technology, Ministry of Education, Beijing 100084, China. thudmeonion@gmail.com.|Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China. thudmeonion@gmail.com.
He-Chong
HC
Xiao
School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China. yfzhu@tsinghua.edu.cn.|Key Laboratory for Advanced Materials Processing Technology, Ministry of Education, Beijing 100084, China. yfzhu@tsinghua.edu.cn.
Yue-Feng
YF
Zhu
functionalization; graphene; nanocomposite; reduction