The low mechanical and thermal conductivity property of polymer bonded explosives (PBX) could greatly restrict its further practical application. In this study, inspired by mussels, a facile and noncovalent modification for three carbon nanofillers including multiwalled carbon nanotubes (CNTs), graphene and graphene nanoplates (GNPs), was adopted by the self-polymerization of dopamine. Next, in-depth characterizations, including SEM, TEM, FTIR, FT-Raman and TGA, confirmed that the carbon nanofillers were successfully coated by a dense graphite-like structure polydopamine (PDA) without destroying the original structures, through the oxidation of dopamine at room temperature. The polydopamine-coated nanofillers (pFillers) were further incorporated into PBX matrix. Compared to neat PBX and PBX/carbon nanocomposites, the PBX/pFillers nanocomposites exhibited improved tensile and compression strength, creep resistance, and thermal conductivity. The work presented herein greatly broadens the application scope of the bioinspired dopamine, and will be potential of interest to the communities in highly particle-filled polymer composites.

聚合物粘结炸药（PBX）的低机械和导热性能可能会极大地限制其进一步的实际应用。在本研究中，受贻贝的启发，通过多巴胺的自聚合反应，对包括多壁碳纳米管（CNT），石墨烯和石墨烯纳米板（GNP）在内的三种碳纳米填料进行了简便且非共价的修饰。接下来，包括SEM，TEM，FTIR，FT-Raman和TGA在内的深入表征证实，碳纳米填料成功地被致密的类石墨结构聚多巴胺（PDA）包覆，而不会通过多巴胺的氧化而破坏原始结构。在室温下。将聚多巴胺涂层的纳米填料（pFillers）进一步掺入PBX基质中。与纯PBX和PBX /碳纳米复合材料相比，PBX / pFillers纳米复合材料表现出改善的拉伸和压缩强度，抗蠕变性和导热性。本文介绍的工作极大地拓宽了生物启发多巴胺的应用范围，并将成为高度颗粒填充的聚合物复合材料领域的潜在兴趣。