Abstract

We synthesized decorated graphene oxide with CeO₂ nanoparticles (CeO₂-GO) hybridusing silane coupling agents, then we dispersed them in the epoxy resin after optimizing it at a weight fraction %1 using differential scanning calorimetry (DSC). The structural and morphological characterization was evaluated using Fourier Transform Infrared spectroscopy (FT-IR), scanning electron microscopy (SEM) and X-ray diffraction. The thermal stability of CeO₂-GO/Epoxy (CGE) and neat epoxy (NE) were studied by TGA analyses and showed that the CGE system has a good thermal stability and higher char yield comparing to the NE system. The degradation kinetic parameters for CGE matrix were computed by the Vyazovkin’s advanced isoconversional method. The master plots as model fitting was used to estimate the thermal decomposition mechanism, and the results show a good agreement between the experimental data and the F1 theoretical model. We have used electrical impedance spectroscopy (EIS) to evaluate electrical resistance of the CGE system at different percent of (CeO₂-GO) nanoparticle. This research highlights that the (CeO₂-GO) nanoparticleis a promising candidate for fabrication of anticorrosive coatings.

摘要

我们使用硅烷偶联剂与CeO ₂纳米颗粒（CeO ₂ -GO）杂化合成了修饰的氧化石墨烯，然后使用差示扫描量热法（DSC）将其优化后以重量分数％1将其分散在环氧树脂中。使用傅里叶变换红外光谱（FT-IR），扫描电子显微镜（SEM）和X射线衍射评估结构和形态特征。CeO ₂的热稳定性通过TGA分析对-GO /环氧（CGE）和纯环氧（NE）进行了研究，结果表明CGE体系与NE体系相比具有良好的热稳定性和较高的炭收率。通过Vyazovkin的先进的等转化方法计算了CGE基质的降解动力学参数。使用主图作为模型拟合来估计热分解机理，结果表明实验数据与F1理论模型有很好的一致性。我们已经使用电阻抗光谱（EIS）来评估CGE系统在（CeO ₂ -GO）纳米粒子的不同百分比下的电阻。这项研究强调了（CeO ₂ -GO）纳米粒子是制造防腐涂料的有希望的候选者。