Al/PTFE亚稳态分子间复合物的制备及其在高温水蒸汽中的反应性能研究  

Preparation of Al/PTFE Metastable Intermolecular Composites and Their Reaction Properties in High-temperature Water Vapor

作　　者：肖飞 陈冲 XIAO Fei;CHEN Chong(North University of China,School of Environmental and Safety Engineering,Taiyuan 030051,China)

机构地区：[1]中北大学环境与安全工程学院,太原山西030051

出　　处：《火炸药学报》2023年第12期1079-1085,共7页Chinese Journal of Explosives & Propellants

基　　金：中国博士后科学基金(No.2023M732495);山西省基础研究计划青年科学研究项目(No.202103021223180)。

摘　　要：为了提高铝与高温水蒸汽的反应活性,采用机械球磨法在不同球磨时间下制备得到了铝基聚四氟乙烯亚稳态分子间复合物(Al/PTFE);通过扫描电镜、激光粒径分析仪、X射线衍射、同步热分析仪研究了Al/PTFE的微观形貌、晶型及氧化性能;利用水蒸汽反应装置研究了Al/PTFE在高温水蒸汽中的点火性能;用扫描电镜、激光粒径分析仪、X射线衍射分析仪研究了Al/PTFE燃烧产物的微观形貌及组成。结果表明,Al/PTFE复合物的形貌随球磨时间的增加由片状向块状转变,粒度随球磨时间的增加而减小;3h球磨制备的Al/PTFE复合物与高温水蒸汽反应时展示出最佳的反应活性,反应产物的中值粒径(D_(50))为17.2μm;3h球磨制备的Al/PTFE复合物在600℃和700℃高温水蒸汽下的点火延迟时间分别为29s和15s,且点火温度比1h和5h球磨制备的Al/PTFE更低。In order to improve the reactivity of aluminum and high-temperature water vapor,aluminum-based polytetrafluoroethylene metastable intermolecular composites(Al/PTFE)with different ball milling time were prepared by mechanical ball milling.The micromorphology,crystal form and oxidation properties of the Al/PTFE were studied by scanning electron microscopy,laser particle size analyzer,X-ray diffraction,and synchronous thermal analyzer.The ignition performance of Al/PTFE in high-temperature water vapor was studied by a water vapor reactor.The micromorphology and composition of Al/PTFE combustion products were studied by scanning electron microscopy,laser particle size analyzer and X-ray diffraction analyzer.The results show that the morphology of Al/PTFE composites changes from flaky to massive with the increase of ball milling time,and the particle size decreases with the increase of ball milling time.The Al/PTFE composites prepared by 3 h ball milling show the best reactivity when reacted with high-temperature water vapor,and the D_(50)of the reaction product is 17.2μm.The ignition delay time of Al/PTFE composites prepared by 3 h ball milling under high-temperature steam at 600℃and 700℃is 29 s and 15 s,respectively.The ignition temperature of the composites prepared in 3 h are lower than those in both 1 h and 5 h.

关 键 词：物理化学 Al/PTFE复合物 铝基水反应金属燃料 球磨 高温水蒸汽 亚稳态分子间复合物 

分 类 号：TJ55[兵器科学与技术—军事化学与烟火技术] O64[理学—物理化学]