One-Step Reduction and Surface Modification of Graphene Oxide by 3-Hydroxy-2-Naphthoic Acid Hydrazide and Its Polypropylene Nanocomposites

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.

Polyvinyl butyral/3‐Hydroxy‐2‐naphthoic hydrazide/Poly (methylhydrosiloxane) Composite Coatings for Improved Stainless Steel Anticorrosion in Salt, Acid, and Alkali Solution

“…The wide peak at 3369 cm −1 and the peak at 1356 cm −1 responded to the stretching vibration and deformation vibration of O−H groups in HNH, respectively. The stretching vibration peak of N−H was 3232 cm −1 , in addition, the range at 1590–1650 cm −1 indicated the deformation vibration of N−H [31] . The absorption peak at 1640 cm −1 improved the existence of C=O groups, [35] and the ‐NH 2 was identified at 1597 cm −1 , which is one of the most active groups in HNH.…”

“…The absorption peak at 1450 cm −1 belonged to skeleton vibration of aromatic rings and the peak at 1174 cm −1 was due to the existence of C−N [24] . Owing to the distribution of the two main side chains in HNH, a peak at 744 cm −1 was observed, which represented the stretching vibration of the ortho‐disubstituted aromatic ring [31] . In a word, the interaction of various groups between HNH made it possess strong reaction activity and corrosion resistance.…”

“…modified graphene oxide (GO) with HNH as a new reductant via one‐step process. The characterization results showed that the interior space increased to 1.921 nm and the agglomeration effect decreased to some extent [31] . However, there was no literature about the corrosion resistance of HNH into coatings.…”

Effect of Organic Nano Carboncapsule Incorporated Modified Clay on Fire‐Retardancy of PMMA Nanocomposites

“…The amounts determined for C, O, and N were calculated. A peak at 285.2 eV was attributed to defects in the nanocarbon structure, whereas the peak at 290 eV corresponds to carbon atoms attached to different oxygen‐containing moieties . This result indicates the increasing surface acidity or the number of hydroxyl and carboxyl groups.…”