2D metal-organic frameworks endow ammonium perchlorate with enhanced thermal effect

Abstract

To investigate the effect of different structures of MOF on the catalytic performance of ammonium perchlorate (AP) thermal decomposition. By adding 2-methylimidazole (2-MI) as an inhibitor during the synthesis of MOF-5, a two-dimensional (2D) MOF material was prepared and characterized by SEM, EDS, XRD, FT-IR and other means. The prepared two-dimensional material was added to the AP raw material to investigate its effect on the AP thermal decomposition process. After DSC and TG test, it was found that the addition of this kind of 2D MOF material can completely eliminate the low-temperature decomposition peak of the AP-based composite and advance the high temperature decomposition peak to 296.5 °C, and the apparent heat of decomposition increase to 905.6 J/g, which has a better catalytic effect than the bulk MOF-5. In addition, through the combustion test, it was found that 2D MOF, as a burning rate catalyst, can effectively enhance the burning rate of AP based solid propellant.