Abstract
3-Hydroxy-2-naphthoic acid hydrazide (HNH), a new reductant and modifier, was applied to reduce and modify graphene oxide (GO) in a one-step process. The obtained HNH reduced graphene oxide (HNH-rGO) was characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), Raman spectroscopy, X-ray photoelectron spectroscopic (XPS) and Fourier transform infrared spectra (FTIR). The results demonstrated that GO was successfully reduced to graphene and the surface of HNH-rGO was grafted with HNH. The interlayer space was increased from 0.751 nm to 1.921 nm, and its agglomeration was much more attenuated compared with GO. HNH-rGO/polypropylene and graphene/polypropylene composites were synthesized through melt-blending method. The viscosity was enhanced with increased addition of graphene and surface modified graphene demonstrated stronger rheological behavior improving effect than the untreated graphene.
Highlights
Graphene, a honeycomb quasi-two-dimensional material formed by sp2 hybrid carbon atoms, was firstly obtained by Geim and Novoselov in 2004 [1]
The interlayer space of Hydroxy-2-naphthoic hydrazide (HNH)-reduced graphene oxide (rGO) increased from 0.751 nm to 1.921 nm so molecular chain of HNH
Through a one-step reduction and covalent modification method by a new reductant HNH, graphene oxide (GO) was successfully reduced and modified into HNH reduced graphene oxide (HNH-rGO) grafted with the molecular chain of HNH
Summary
A honeycomb quasi-two-dimensional material formed by sp hybrid carbon atoms, was firstly obtained by Geim and Novoselov in 2004 [1]. Graphene (G) has drawn more and more attention in the applications of electrode material [2], biological composite material [3], liquid crystal materials [4,5], supercapacitor [6,7], polymer nanocomposites [8] as well as solar cells [9] This is entirely based on its excellent properties such as good thermal and electrical conductivities, large theoretical specific surface area, flexibility, high intrinsic mobility and chemistry stability [10,11]. Some researchers have studied graphene-based nanocomposites with covalent bonds between matrix and fillers which performed better mechanical and thermal properties versus the neat matrix polymer [36,37,38].
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