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Fe/N-based biomass porous carbon composite (Fe/N-pCarbon) was prepared by a facile high-temperature carbonization method from biomass, and the effect of Fe/N-pCarbon on the thermal decomposition of energetic molecular perovskite-based material DAP-4 was studied. Biomass porous carbonaceous materials was considered as the micro/nano support layers for in situ deposition of Fe/N precursors. Fe/N-pCarbon was prepared simply by the high-temperature carbonization method. It was found that it showed the inherent catalysis properties for thermal decomposition of DAP-4. The heat release of DAP-4/Fe/N-pCarbon by DSC curves tested had increased slightly, compared from DAP-4/Fe/N-pCarbon-0. The decomposition temperature peak of DAP-4 at the presence of Fe/N-pCarbon had reduced by 79°C from 384.4°C (pure DAP-4) to 305.4°C (DAP-4/Fe/N-pCarbon-3). The apparent activation energy of DAP-4 thermal decomposition also had decreased by 29.1 J/mol. The possible catalytic decomposition mechanism of DAP-4 with Fe/N-pCarbon was proposed.

Energetic molecular perovskites have attracted widespread attention in the fields of energy materials due to their high detonation performance. In this work, we reported the effect of MgCo2O4 nanosheets on the thermal decomposition of ammonium perchlorate (NH4ClO4, AP)-based energetic molecular perovskites (AP-based energetic molecular perovskites). The morphology and structure of the MgCo2O4 nanosheets were characterized. And their catalytic effect on the thermal decomposition of AP-based energetic molecular perovskites (H2pz)[NH4(ClO4)3] (PAP-4), (H2dabco)[NH4(ClO4)3] (DAP-4), (H2mpz) [NH4(ClO4)3] (PAP-M4), and (H2hpz)[NH4(ClO4)3] (PAP-H4) was analyzed. The results showed that MgCo2O4 nanosheets had excellent intrinsically catalytic performance towards enhancing the thermal decomposition of AP-based energetic molecular perovskites. After adding MgCo2O4 nanosheets, the thermal decomposition peak temperatures of PAP-4, DAP-4, PAP-M4, and PAP-H4 had been reduced by 35.7 °C, 48.4 °C, 37.9 °C, and 43.6 °C, respectively. And the activation energy (Ea) of the thermal decomposition of AP-based energetic molecular perovskites had been reduced, the Ea of PAP-H4 decreased by 46.4 kJ/mol at most among them. The catalytic mechanism of MgCo2O4 nanosheets for AP-based energetic molecular perovskites is analyzed. This work provides a reference for the future application of AP-based energetic molecular perovskites. [ABSTRACT FROM AUTHOR]

Improving the thermal decomposition performance of hexanitrohexaazaisowurtzitane (CL-20) by appropriate methods is helpful to promote the combustion performance of CL-20-based solid propellants. In this study, we synthesized a sandwich structure of CL-20 and nanoporous carbon scaffolds film (NCS) and emphatically studied the thermal decomposition performance of the composite structure. Thermogravimetric analysis and differential scanning calorimetry were used to measure the thermal decomposition process of the composite structure. The kinetic parameters of thermal decomposition were calculated by the thermal dynamic analysis software AKTS. These results showed that the thermal decomposition performance of the sandwich structure of CL-20 and NCS was better than CL-20. Among the tested samples, NCS with a pore size of 15 nm had the best catalytic activity for the thermal decomposition of CL-20. Moreover, the thermal decomposition curve of the composite structure at the heating rate of 1 K/min was deconvoluted by mathematical method to study the thermal decomposition process. And a possible catalytic mechanism was proposed. The excellent thermal decomposition performance is due to the sandwich structure enhances the interface reaction of CL-20 and NCS. This work may promote the extensive use of CL-20 in the field of solid rocket propellant. [ABSTRACT FROM AUTHOR]