In order to promote the green development of industrial explosives, the green oxidant hydrogen peroxide(H₂O₂)is used to partially or completely replace ammonium nitrate(AN)to form a new type of industrial explosive. This can reduce the generation of NO_x and improve the adverse impact on the environment. It is the most promising industrial “green explosive”. Based on this, the research progress of H₂O₂-based mixed explosives was reviewed, and the detonation performance of H₂O₂-based explosives was introduced from three aspects: H₂O₂/H₂O pure solution, H₂O₂/Fuel liquid mixture and H₂O₂/Fuel colloid. The decomposition characteristics of H₂O₂ in H₂O₂/Fuel-based explosives were analyzed, and the detonation performance of H₂O₂/Fuel-based explosives was compared with that of traditional AN-based explosives. The shock initiation mechanism of H₂O₂-based explosives was explained. By elaborating on the progress in research on the explosiveness of H₂O₂-based explosives, the problems faced by H₂O₂-based “green explosives” were analyzed, including insufficient basic performance characterization and unclear initiation mechanism, and the development prospects of H₂O₂ in industrial explosives were prospected. 103 References are attached.

The applications of biomolecules such as DNA, peptides, proteins, polydopamine(PDA), tannic acid(TA)and cellulose in the field of energetic materials were reviewed. Firstly, the current problems faced by conventional energetic materials were analyzed, and the advantages of self-assembly technology in the preparation of new structural energetic materials were presented. The new structural energetic materials prepared with self-assembly technology by assembling biomolecules were expected to realize improvement in performance. Then, based on relevant studies at home and abroad, the structural features of these biomolecules, the advantages, process and mechanism of assembly were described. The performances of the synthesized new structural energetic materials were also outlined. Finally, the current research on the applications of biomolecules in the field of energetic material were summarized. The challenges faced by the new structural energetic materials in terms of performance optimization, mechanism study and application cost were analyzed. Their potential applications in aerospace and sustainable development were looked forward. 55 References are attached.

In order to investigate the plasma characteristics and evolution of nitrogen-containing compounds generated by pulsed laser ablation in different atmospheric environments, by using boron nitride(BN)as the target material, it was ablated by pulsed laser in nitrogen, air, and near-vacuum, respectively. The plasma signals generated by ablation with different delay times were collected by spectrometer, revealing the growth and extinction processes of plasma. The results show that the BN ablated in air generates a large amount of oxygen plasma and exhibits a characteristic spectral peak, which essentially disappears when ablating in nitrogen or near vacuum. When BN is ablated in nitrogen, the higher number of nitrogen atoms(N I), monovalent nitrogen ions(N II)and trivalent nitrogen ions(N IV)are generated, and the nitrogen plasma exists for the longest time. For N I and N IV the longest existence time are up to 4400ns and 3450ns, respectively. Laser ablation of BN in nitrogen is the most favorable for the preparation of nitrogen atom clusters under the three different sputtering environments.

In view of the poor description of 2,6-diamino-3,5-dinitropyrazine-1-oxide(LLM-105)by the ReaxFF initial force field, a JAX-ReaxFF framework strategy based on the gradient descent algorithm was adopted to reparameterize the ReaxFF reactive force field, paying much attention to the dissociation changes of the potential energy surface of different bonds and bond angles. The reaction mechanism of LLM-105 was analyzed in the simulation of reactions at different temperatures and thermal decomposition rates. The results indicate that at 1500 K, the molecular reactions mainly involved polymerization and dehydrogenation. As the temperature gradually increased, the reaction pathways of LLM-105 showed new changes. When the temperature is not less than 2000K, in addition to the original polymerization and dehydrogenation reactions, the cleavage of C—NO₂ bonds and C—NH₂ bonds were also observed. It is worth noting that the C—NO₂ bond became the key factor in triggering this series of reactions. As the C—NO₂ and C—NH₂ bonds in the molecules began to undergo homolytic cleavage, the formation of intermediates HON₂, NO₂ and NH₃ were formed. These intermediates underwent complex interactions and eventually generated stable products such as N₂, H₂O and CO₂, indicating that the force field can effectively simulate the changes in chemical reactions at different temperatures and heating rates.

In order to study the ignition and explosion properties of micro-nano self-assembled and physically mixed aluminum powder materials, the ignition sensitivity, flame propagation characteristics and explosion parameters of the materials were studied through a 1.2L Hartmann tube and a 20L ball explosion test system. The results show that compared with Al-T4 micron aluminum powder, nano-aluminum powder can significantly reduce the ignition energy of aluminum powder materials.And the ignition sensitivity of the self-assembly process is further increased compared with that of aluminum powder materials with physical mixed process. In terms of the flame propagation speed, the high reaction rate of a small amount of nano-aluminum powder can accelerate the reaction of micron aluminum powder, and the self-assembled aluminum powder is easy to ignite and the heat transfer is more efficient due to the overall synergistic effect of micro-nano aluminum powder. In the 20L ball explosion test system, the maximum explosion pressure and explosion index of self-assembled and physical mixed aluminum powder with 5% mass fraction of nano content are 0.72MPa, 0.75MPa, 43.21MPa·m/s and 31.49MPa·m/s at 500g/m³. The maximum explosion pressure and explosion index of self-assembled and physical mixed aluminum powder with 10% mass fraction are 0.84 and 0.68MPa at 1000g/m³. The explosion pressure and explosion index of 5% mass fraction of nano aluminum powder increase first and then decrease with increasing the concentration, and the explosion pressure and explosion index of aluminum powder with 10% mass fraction increase with the increase of concentration. The explosion power of the composite system isnot only related to the activity, but also has a certain relationship with the calorific value of the powder.

Regarding the problem of insufficientfire transfer rate of black powder, the nano-sulphur/RGO composite(RGS)wasprepared based on growth of nano-S on RGO in-situ, then mixed with KNO₃using ice template method to get KNO₃/RGS composite(RGPS). The morphology, composition, thermal decomposition and combustion performance were characterized by FE-SEM, XRD, BET, DSC and HSVR and the performances of KNO₃/RGS composite(RGPS)were compared with that of the physical mixture. The results show that nano-S is anchored in situ on RGO nanosheets and KNO₃ is embedded in RGS. The average diameter of the size of KNO₃ is about 3μm. The BET surface area of RGPS composite is about 8.1m²/g, which is much larger than 4.2m²/g of the physical mixture. The exothermic peak temperature of RGPS is lower about 13.6℃ than that of the physical mixture, the amount of released heat increased by 82.4%. The reaction activation energy of RGPS composite is 153kJ/mol, reduced by 16kJ/mol compared to the physical mixture. Compared with black powder physical mixture and RGPS physical mixture, the average combustion speed of RGPS composite is increased by 220.3% and 182.1%, respectively. The strategy can enhance the thermal decomposition and combustion performance of RGPS.

To investigate the enhancement effects of free hydrogen produced by metal hydrides on the damage performance of fuel air explosive(FAE), A 20L spherical liquid explosion test system and the colorimetric temperature measurement technology were used to study the effects of different matrix liquid fuels and metal additives on the shock wave and thermal damage performance of FAE. The results show that epoxypropane(PO)has the best explosion performances of the three liquid matrix fuels commonly used in FAE. When titanium hydride(TiH₂)powders are added to PO, the explosion overpressure, maximum pressure rise rate and maximum average temperature of the mixed fuels increase first and then decrease with the increase of TiH₂ powders content, reaching the maximum values when the mass fraction of TiH₂ powders was 35%, namely, 1.21MPa, 68.73MPa/s and 2398K, respectively. Compare to Ti-PO mixed fuels, the TiH₂-PO mixed fuels has more continuous combustion flame and more excellent explosion performances at the same mass concentration. The research results indicate that as a potential high-energy additives, TiH₂ could be effectively applied to FAE to improve its explosion characteristics and enhance the shock wave as well as the thermal damage performances.

To study the fragmentation forming characteristics of 3D printed fragmentation warhead shells, a water medium fragmentation recovery experiment was conducted on the centrally pre-controlled channel steel shell melted by selective laser melting(SLM). By comparing the shell fragment forming conditions of different charge length to diameter ratios, pre-controlled groove depth ratios, and network shapes, the influence of pre-controlled groove parameters on the fragment morphology was clarified, and its fracture mode was discussed. The results indicate that the central pre-controlled grooves significantly improve the fragmentation controllability through directional guidance, achieving fragment mass recovery rates of 87.09%—94.42% and reach the maximum complete fragment generation rate of 99.60%. There is a critical threshold for the charge length to diameter ratio. When the length to diamete