关键词: 氧化石墨烯, 反应量热仪(RC), 差示扫描量热仪(DSC), 工艺危险性, 扫描电子显微镜(SEM), 能谱仪(EDS)

Abstract: In order to reduce the risk in the preparation process of graphene oxide, experiment were carried out. RC, DSC, SEM, EDS and other instruments were used to explore the cause of heat release during the process and study effects of the stirring speed, the feeding time, the feeding temperature and the reaction temperature in the middle temperature stage and other parameters on the heat release. Orthogonal tests were designed and performed to obtain the relevant kinetic parameters under different conditions. Finally, according to the orthogonal analysis of the kinetic parameters, optimal conditions for the preparation process were obtained. The results show that the exothermic cause is accumulation and rapid decomposition of potassium permanganate, that the reaction temperature in the middle temperature stage is an important factor in controlling the risk in the process of preparing graphene oxide, and that a operating condition having a stirring speed of 250 r/min, a feeding time of 60 min, a feeding temperature of 0 ℃, and a reaction temperature of 20 ℃ in the intermediate temperature stage is the optimum operating condition.

Key words: graphene oxide, reaction calorimetry(RC), differential scanning calorimetry(DSC), process hazard analysis, scanning electron microscopy(SEM), energy dispersive spectrometry(EDS)