Effects of Fe2O3 on the Thermal Decomposition Properties of Nitrocellulose
首发时间:2015-01-21
Abstract:The rodlike and polyhedral Fe2O3 nanoparticles (NPs) were synthesized by the hydrothermal method. The products were characterized by scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), Brunauer-Emmett-Teller (BET) and differential scanning calorimetry (DSC). Effects of Fe2O3 on the thermal decomposition property of nitrocellulose (NC) were presented. The kinetic model function of NC and two NC-Fe2O3 is investigated and classified as Avrami-Erofeev equation f(α)=3(1-α)[-ln(1-α)]1/3/2 in differential form. Furthermore, the results indicate that the effects of Fe2O3 are dependent on the specific surface area. The apparent activation energy and pre-exponential constant of rodlike Fe2O3 are lower with the higher specific surface area than that of polyhedral Fe2O3. This work is very significant for choosing the Fe2O3 with special morphologies in order to improve their catalytic action.
keywords: nanomaterial catalyst thermal property
点击查看论文中文信息
Fe2O3对硝化棉热分解的影响
摘要:采用水热法合成棒状和多面体状纳米Fe2O3。利用扫描电镜(SEM)、能谱分析(EDS)、X射线粉末衍射(XRD)、傅里叶变换红外衍射(FT-IR)、比表面积测试(BET)和差示扫描量热(DSC)对产物进行表征。研究了Fe2O3对硝化棉热分解性质的影响。研究表明硝化棉和两种NC-Fe2O3复合物的动力学机理方程遵循Avrami-Erofeev方程微分形式f(α)=3(1-α)[-ln(1-α)]1/3/2。结果表明Fe2O3的影响作用取决于比表面积。棒状Fe2O3比表面积大于多面体Fe2O3,故含棒状Fe2O3的NC-Fe2O3复合物的活化能和指前因子较小。本工作在选择特殊形貌的Fe2O3以改善其催化性能方面有重要意义。
基金:
论文图表:
引用
No.4626592102416914****
同行评议
勘误表
Fe2O3对硝化棉热分解的影响
评论
全部评论0/1000