Bioinspired hierarchical interface design for improved mechanical and safety properties in energetic polymer composites
Bioinspired hierarchical interface design for improved mechanical and safety properties in energetic polymer composites
复制标题
仿生分层界面设计可提高含能聚合物复合材料的机械和安全性能
DOI：
10.1007/s10853-020-05130-3
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发表时间：
2020-08-31
影响因子：
4.5
通讯作者：
Yang, Zhijian
中科院分区：
文献类型：
--
作者：
He, Guansong;Li, Xin;Yang, Zhijian
摘要界面相互作用弱和表面润湿性差是制约和削弱含能复合材料性能的重要因素。由于无法解决界面不相容的问题，传统的表面改性方法很难达到预期的效果。我们在这里展示了生物启发的层次结构的2,6-二氨基-3,5-二硝基吡嗪-1-氧化物颗粒，通过原位“接枝”聚合的超支化聚氨酯（HBPU）在聚多巴胺表面。得益于增强的界面相互作用和表面润湿性，最终结果表明，通过这种方式成功地实现了显著的机械增强。同时提高了安全性能，并在很大程度上降低了冲击敏感性，这主要归功于带有软段的HBPU壳的缓冲和保护作用。我们相信，这种以解决低表面润湿性和弱界面为目标的仿生分层界面构建方法，将为高性能复合材料的设计和制备提供一条新颖有效的途径。图形抽象
AbstractWeak interfacial interaction and poor surface wettability always restrict and weaken the performances of energetic composites. Conventional surface modifications can hardly achieve a desired result, due to the inadequacy for solving the interfacial incompatibility. We here demonstrated bioinspired hierarchical-structured 2,6-diamino-3,5-dinitropyrazine-1-oxide particles through in situ “grafting from” polymerization of hyperbranched polyurethane (HBPU) on polydopamine surface. Benefiting from the enhanced interfacial interaction and surface wettability which facilitated mechanical performance, the final results revealed that a remarkable mechanical enhancement was successfully achieved through this way. Meanwhile, improved safety performance was gained, and the impact sensitivity was reduced to a large extent which was ascribed to the cushioning and protective effects of HBPU shells with soft segments. We believe this approach of constructing bioinspired hierarchical interface aiming at solving low surface wettability and weak interface will shed light on the design and preparation of high-performance composites through a novel and effective way.Graphic abstract