To explore the new energetic candidate with high energy and low sensitivity, hexagonal boron nitride nanosheets (hBNNS) are first introduced into the field of energetic materials with a bioinspired strategy, and a novel core@dual shell energetic composite is constructed with 1,3,5,7‐tetranitro‐1,3,5,7‐tetrazocane (HMX) as core, adhesive polydopamine (PDA) as inner shell and hBNNS as exterior shell. The composites are analyzed by several methods to in‐depth investigate the core@dual shell structure and its influence on the performance of energetic crystal. These results indicate adhesive PDA is a crucial bridge between HMX and low contents of hBNNS in core@dual shell structure, and the adhesive PDA is a crucial bridge between the HMX and hBNNS. The coating does not affect the chemical structure and polymorph of HMX. The PDA can stabilize the polymorph of HMX, and hBNNS can increase the thermal stability of HMX. The nonisothermal analysis further shows HMX@PDA@hBNNS composites exhibit better thermal stability than that of HMX and HMX@PDA by increasing the apparent activation energy. Furthermore, the coated PDA and hBNNS can reduce the impact and friction sensitivities significantly, precisely because of the buffering effect of “soft” hBNNS and isolation effect of dual shell.

中文翻译：

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HMX @ hBNNS双壳含能复合材料具有增强的脱敏性和改善的热性能的生物启发策略

为了探索具有高能量和低灵敏度的新型高能候选材料，首先以生物启发策略将六方氮化硼纳米片（hBNNS）引入高能材料领域，并以1,3，以5,7-四硝基-1,3,5,7-四唑烷（HMX）为核心，以聚多巴胺（PDA）为内壳，以hBNNS为外壳。通过几种方法对复合材料进行了分析，以深入研究核双壳结构及其对高能晶体性能的影响。这些结果表明，胶粘剂PDA是HMX和低含量的hBNNS在核@双壳结构之间的重要桥梁，而胶粘剂PDA是HMX和hBNNS之间的重要桥梁。该涂层不影响HMX的化学结构和多晶型物。PDA可以稳定HMX的多晶型物，而hBNNS可以提高HMX的热稳定性。非等温分析进一步表明，HMX @ PDA @ hBNNS复合材料通过增加表观活化能，显示出比HMX和HMX @ PDA更好的热稳定性。此外，涂覆的PDA和hBNNS可以显着降低冲击和摩擦敏感性，这恰好是由于“软” hBNNS的缓冲作用和双壳的隔离作用。