纳米Pb(II)-没食子酸配合物的合成及其燃烧催化性能

采用液相分散沉淀法制备了纳米 Pb(II)-没食子酸配合物粉体. 用热重分析(TG)、X 射线衍射仪(XRD)、透射电镜(TEM)、核磁共振仪(1H NMR)、红外光谱仪(IR)、激光散射粒径分析仪和元素分析仪对样品的物相、形貌、粒径和组成进行了表征. 研究了没食子酸的浓度和分散剂用量对产物的粒子大小的影响. 并测试了产物对推进剂燃烧的催化作用. 结果表明: 产物的平均粒径约为 30 nm. 没食子酸的浓度降低和分散剂用量增加均使产物的粒子减小. 产物能明显改善推进剂的燃烧性能, 使推进剂的燃速提高 88%, 压强指数降低了 70%.

Synthesis and Combustion Catalytic Activity of Nanoparticle Pb(II)-gallate Complex

The nanoparticle Pb(II)-gallate complex was synthesized by liquid dispersion deposition method. The influence of concentrations of precipitant and amount of dispersant (PEG-200) on the particle size of the complex was studied. The Pb(II)-gallate complex was characterized with TEM, XRD, TG, H NMR and IR. 1 The composition of the complex was determined by chemical method and elemental analysis. The catalytic performance of nanoparticle complex on the combustion of RDX-CMDB propellant was investigated. The results showed that the average particle size of complex was about 30 nm. The particle size of complexes in- creased with increasing concentrations of precipitant and decreasing amount of dispersant. The nanoparticle complex Pb(II)-gallate can enhance burning-rate of propellant by 88%, and lower the pressure exponent by 70%.