Application of ammonium perfluorooctanoate (APFO) in nano-aluminum (nAl) based energetic nanocomposites is proposed in this work. By fixating fluorine in AlF₃, combustion as oxidizer introduces both an efficient defluorination strategy and a high performance power source for APFO. The laser ignition temperature build-up of nAl/APFO is about 2300 ^oC/s, and the combustion temperature approaches 1240 ^oC with an energy density of 12.6 kJ/g. The combustion residue of nAl/APFO contains AlF₃ as primary condensed product with graphite, tar and Al₂O₃. And the gaseous fluorinated product is CF₄ with low abundance. With the higher heat release obtained from oxygen bomb comparing to the stoichiometric value, results exhibit a high defluorination efficiency. The pyrolysis mechanism of APFO and its interaction with nAl were investigated by DSC-TG-PyMS-FTIR, T-jump-PyGC-MS coupling analysis and in-situ XRD. It shows that APFO undergoes multi-stage pyrolysis including proton transfer, skeletal chain breakage succeeded by a distinct polymerization before C-F bond cleavage. Al₂O₃ on the surface of nAl adsorbs the evolved fluorides after the initial pyrolysis of APFO in nAl/APFO, which also decreases the apparent activation energies of the last two stages of pyrolysis. The passivation layer on the surface of Al corroded by HF and perfluorocarboxylic acid before the violent fluorination of active Al core.

这项工作提出了全氟辛酸铵（APFO）在基于纳米铝（nAl）的高能纳米复合材料中的应用。通过将氟固定在AlF _3中，作为氧化剂的燃烧为APFO引入了有效的脱氟策略和高性能电源。nAl / APFO的激光点火温度升高约为2300 ^o C / s，燃烧温度接近1240 ^o C，能量密度为12.6 kJ / g。nAl / APFO的燃烧残余物包含AlF ₃作为主要冷凝产物，与石墨，焦油和Al ₂ O _3一起。气态氟化产物为CF ₄丰度低。与化学计量值相比，氧弹释放的热量更高，结果显示出较高的脱氟效率。通过DSC-TG-PyMS-FTIR，T-jump-PyGC-MS耦合分析和原位XRD研究了APFO的热解机理及其与nAl的相互作用。结果表明，APFO经历了多阶段的热解，包括质子转移，骨架链断裂，CF键断裂前的独特聚合作用。铝₂ O ₃在nAl / APFO中，APFO初始热解后，nAl表面的磷吸附了放出的氟化物，这也降低了热解的最后两个阶段的表观活化能。活性铝芯剧烈氟化之前，铝表面的钝化层被HF和全氟羧酸腐蚀。