仿生疏液表面对浇注PBX药浆的低黏附性能研究

Study on Low Adhesive Property of Bioinspired Anti-wetting Surface to Cast PBX Slurry

降低浇注高聚物粘接炸药(PBX)药浆与接触材料的黏附作用是提高浇注固化PBX制备工艺水平和效率的关键因素之一。采用溶液刻蚀方法在接触容器金属表面构筑微米-纳米多级复合仿生结构,使高黏液端羟基聚丁二烯(HTPB)和浇注PBX药浆在金属表面的静态接触角均大于130°,表面具有良好的疏液性能,且通过调整刻蚀时间为120 min时,在金属表面形成仿花状的微纳米复合结构,可使金属表面与HTPB、HTPB/Al和HTPB/1,1-二氨基-2,2-二硝基乙烯(Fox-7)药浆间的黏附作用力分别降低至29.4,46.0μN和12.7μN,下降幅值达57%~82%。同时将仿生结构涂覆于模具内表面,宏观实现对PBX药浆不黏附特性。

Reducing the adhesion between the cast polymer bonded explosive(PBX)slurry and the contact material is one of the key factors to improve the preparation technology level and efficiency of the casting solidified PBX. Constructing micro-nano hierarchical composite bioinspired structure on the metal surface of contact container by solution etching method makes the static contact angles of high-viscosity HTPB and casting PBX slurries be all higher than 130°. The surface has well anti-wetting properties and forming the bioinspired flower micro-nano composite structures on the metal surface by adjusting the etching time for 120 minutes can make the adhesion force between the metal surface and HTPB、HTPB/Al and HTPB/Fox-7 slurry decrease to 29.4,46.0 μN and 12.7 μN,respectively,with a decrease range of 57%~82%. At the same time,the bioinspired structure is coated on the inner surface of the die,and the non-adherence property of PBX slurry is realized macroscopically.