Synergistic fluorine-Aluminum catalysis for enhanced AP decomposition kinetics

This study addresses the challenge of incomplete combustion in aluminum-based propellants caused by surface oxidation by developing a core-shell Al@DINGU composite, which exhibits excellent storage stability and effectively suppresses moisture infiltration. Through thermogravimetric and calorimetric analyses, we systematically investigated the multiphase interfacial interactions between fluorinated aluminum coatings and ammonium perchlorate (AP). Results demonstrate that both Al and Al@DINGU enhance AP decomposition kinetics, with the AP/Al@DINGU system achieving a 52.7°C reduction in peak decomposition temperature (Tp) and a 46.52% decrease in apparent activation energy (Ea) compared to pure AP. These findings establish a strategic framework for optimizing interfacial reactivity in solid propellants through tailored core-shell engineering, offering insights into the interactions between oxidizer components and metallic fuels.