Weak interfacial interactions always restricted and weakened the properties of the composite materials and constituted a primary bottleneck. Herein, under the guidance of bioinspired engineering thought and inimitable structural features of hyperbranched polymers (HBPs), a series of designed multilevel core-shell 1,3,5-triamino-2,4,6-trinitrobenzene (TATB) particles by in-situ grafting HBPs on polydopamine (PDA) surface via “grafting-from” route was reported. Then, using water suspension granulation method, TATB based PBX composites were prepared by adding polymer binder solution dropwise into explosive suspension. The results displayed that a high efficiency mechanical enhancement of polymer bonded explosives (PBX) composites was achieved. After the incorporation of linear soft chains to regulate the outer shell of hyperbranched polyurethane (HBPU), the composites with multilevel core-shell-shell structure revealed the highest tensile and compressive strength at only 1.5 wt% polymer shell content. Based on morphology and structure characterization, contact angle measurement and small-angle neutron scattering (SANS) measurement, a mechanical reinforcement mechanism was proposed. This approach provides a promising project for design and preparation of high performance polymer composites.

弱的界面相互作用总是限制和削弱复合材料的性能，并构成了主要的瓶颈。在此，下仿生工程的指导思想和超支化聚合物（HBPS），一系列设计多级核-壳1,3,5-三氨基-2,4,6-三硝基苯的（TATB）颗粒的独特的结构特征IN-原位据报道通过“接枝”途径将HBP接枝到聚多巴胺（PDA）表面上。然后，使用水悬浮造粒法，通过将聚合物粘合剂溶液滴加到爆炸性悬浮液中来制备基于TATB的PBX复合材料。结果表明，实现了聚合物粘结炸药（PBX）复合材料的高效机械增强。在掺入线性软链以调节超支化聚氨酯（HBPU）的外壳后，具有多级核-壳-壳结构的复合材料在仅1.5 wt％的聚合物壳含量下显示出最高的拉伸和压缩强度。基于形态学和结构表征，接触角测量和小角度中子散射（SANS）测量，提出了一种机械增强机理。