碳纳米管催化二硝酰胺铵燃烧和热分解

Combustion and thermal decomposition of ammonium dinitramide catalyzed by carbon nanotubes

通过燃速测定和热失重研究了碳纳米管(CNTs)、CNTs负载Fe2O3纳米粒子(Fe2O3/CNT)和CNTs负载Fe.Cu纳米粒子(Fe.Cu/CNT)对二硝酰胺铵(ADN)燃烧和热分解的影响。结果表明:CNTs、Fe2O3/CNT和Fe.Cu/CNT三种催化剂都可以提高ADN的燃速,降低压力指数。当这三种催化剂添加质量分数为3%时,在4M Pa下,燃速从30.49mm/s分别增加到50.59mm/s、39.72mm/s和38.79mm/s,压力指数从0.81分别降低到0.36、0.67和0.75。TG分析表明,添加质量分数为1%催化剂时,这三种催化剂降低ADN的初始热分解温度分别为18.3℃、12.1℃和11.6℃。

The catalysis of carbon nanotubes（CNTs）,carbon nanotubes supporting ferric oxide（Fe2O3/CNT） and carbon nanotubes supporting iron and copper（Fe·Cu/CNT） on the combustion and thermal decomposition of ammonium dinitramide（ADN） were investigated through burning rate measurements and TG analysis.Results show that all three catalysts increase the burning rate of ADN.The burning rates are related to combustion pressure by a power function and the pressure exponents decrease with the amount of catalyst for all of the three catalysts.When 3mass% of catalyst is used the burning rate of ADN at 4MPa increases from 30.49 to 50.59,39.72 and 38.79mm·s-1 and the pressure exponents decrease from 0.81 to 0.36,0.67 and 0.75 for the CNTs,Fe2O3/CNTs and Fe·Cu/CNTs respectively,TG tests show that all three catalysts decrease the thermal decomposition temperature of ADN.The primary thermal decomposition temperatures of ADN decrease to 18.3℃,12.1℃,and 11.6℃ for the CNTs,Fe2O3/CNTs and Fe·Cu/CNTs respectively when 1mass% catalyst was added to ADN.