Catalyzing aluminum particle reactivity with a fluorine oligomer surface coating for energy generating applications

摘要: Abstract Exothermic surface reaction between fluorine from a fluorine-containing polymer and the alumina (Al2O3) monolayer shell surrounding aluminum (Al) fuel particles promotes reactivity. This study investigates reactivity of Al when coated with liquid fluorinated oligomer, specifically perfluoropolyether (PFPE). Flame speeds, differential scanning calorimetry (DSC), thermogravimetric analysis (TGA) quadruple mass spectrometry (QMS) were performed for Al-PFPE blends varying particle sizes (i.e., 80, 100, 120 5500 nm average diameter). The results show that combustion performance these is highly dependent on Al2O3 exposed area catalyzes decomposition PFPE. As diameter increases 80 to 120 nm, exhibit an increase in flame speeds by 48% corresponding exothermic identified as pre-ignition (PIR) calorific output main reaction. But, blends, decrease 93%. higher activation energy lower Al-Al2O3 volume ratio micrometer-scale fails significantly catalyze PIR reduced overall These introduce new simplified synthesis approach catalyzing strategically