核壳结构nAl@Cu(BTC)/Fe(BTC)纳米铝热剂的制备及燃烧性能  

Preparation and Combustion Performances of Core⁃Shell Structured Al@Cu(BTC)/Fe(BTC)Nano⁃Thermite

作　　者：史喆 赵媛媛 马志伟 杨玉林 张健 王旭文 梁家燕 SHI Zhe;ZHAO Yuan-yuan;MA Zhi-wei;YANG Yu-lin;ZHANG Jian;WANG Xu-wen;LIANG Jia-yan(China Wuzhou Engineering Group Corporation LTD,Beijing 100053,China;MIIT Key Laboratory of Critical Materials Technology for New EnergyConversion and Storage,School of Chemistry and Chemical Engineering,Harbin Institute of Technology,Harbin 150001,China)

机构地区：[1]中国五洲工程设计集团有限公司,北京100053 [2]哈尔滨工业大学化工与化学学院,新能源转换与存储关键材料技术工业和信息化部重点实验室,黑龙江哈尔滨150001

出　　处：《含能材料》2024年第5期465-474,共10页Chinese Journal of Energetic Materials

摘　　要：为了解决纳米铝热剂的制备工艺中组分分布不均匀和燃烧效率低等问题,采用层层组装技术将铜‐均苯三甲酸(Cu(BTC))和铁‐均苯三甲酸(Fe(BTC))交替包覆在nAl表面,制备核壳结构nAl@Cu(BTC)/Fe(BTC)纳米铝热剂,并对其结构、形貌、热反应性能(铝热反应温度)和燃烧性能(燃烧时间、点火延迟时间和燃烧温度等)进行研究。结果表明:层层组装技术可以调控包覆层的厚度和形貌,随着包覆层厚度的增加纳米铝热剂从粗糙疏松逐渐变得光滑致密;交替包覆12层Cu(BTC)/Fe(BTC)的纳米铝热剂燃烧剧烈,火焰传播速率较快,在0.710 s内火焰达到最大,具有适中的点火延迟时间(0.509 s)、最短的燃烧时间(2.036 s)和最高的燃烧温度(1425℃),此时,Cu(BTC)和Fe(BTC)的协同作用使其铝氧化反应温度峰值降低到552.5℃和735.0℃。In order to solve the inhomogeneous component distributions and low combustion efficiency in the preparation pro-cess of nano-thermite,the core-shell structured nAl@Cu(BTC)/Fe(BTC)was prepared via a layer by layer assembly technique.The structure,morphology,thermal reaction performance(thermite-reaction temperature)and combustion performance(com-bustion time,ignition delay time,and combustion temperature,etc.)of nAl@Cu(BTC)/Fe(BTC)were studied.The results show that the thickness and morphology of the coating layer can be regulated during the layer by layer assembly process.As the thick-ness of the coating layer increases,the nano-thermite gradually changes from rough and loose to smooth and dense.The nano-thermite with alternating 12 layers of Cu(BTC)/Fe(BTC)possesses a severe burning effect with a fast flame propagation rate that reaches the maximum flame within 0.710 seconds.Besides,this sample also achieves a moderate ignition delay time(0.509 s),the shortest combustion time(2.036 s),and the highest combustion temperature(1425℃).Meanwhile,its decom-position peak temperature of aluminum oxidation reaction can be reduced to 552.5℃and 735.0℃due to the synergistic effect of Cu(BTC)and Fe(BTC).

关 键 词：核壳结构 纳米铝热剂 nAl@Cu(BTC)/Fe(BTC) 层层组装技术 燃烧性能 

分 类 号：TJ55[兵器科学与技术—军事化学与烟火技术] TQ560.7[化学工程—炸药化工]