To improve the dispersion of graphene oxide (GO) in a polymer matrix, two kinds of biomass molecules, chitosan (CS) and cardanol, were chosen to modify GO. CS and cardanol was mixed with GO in ethanol and agitation, respectively. The chain of CS was grafted onto GO, which were called KGO at here; cardanol chain were grafted onto GO and were called YGO in this paper. The chemical structures of KGO and YGO were characterized by FT-IR, TEM, respectively. The XPS results demonstrated that 40 % oxygen and 60 % carbon existed on the surface of GO. However, the elements content on the GO surface was altered after modification; 7.58 % nitrogen, 26.16 % oxygen, and 63.05 % carbon were observed on the surface of KGO. Furthermore, 93.85 % carbon and 6.15 % oxygen existed on the surface of YGO. The curing behavior of GO was characterized by DSC. There was only one exothermic peak around 172 °C during cure. Compared with the DSC curve of GO, one endothermic peak around 105 °C and two exothermic peaks at 224 and 310 °C were found during the cure of KGO; two exothermic peaks around 160 and 310 °C appeared during the curing of YGO. The thermal stability was studied by TGA. The TGA curves of KGO and YGO all showed three stages during the degradation, which were different from a linear degradation during GO. The fracture properties of GO after modification were also characterized by FESEM in this paper.
Research on Chemical Intermediates – Springer Journals
Published: Jan 13, 2015
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