CL-20/聚氨酯基复合物喷墨打印成型及性能研究

Research on Molding and Performance of CL-20/Polyurethane-based Composite Inkjet Printing

为改善喷墨打印过程中含能复合物的沉积质量,以六硝基六氮杂异伍兹烷(CL-20)为主体炸药,以聚乙二醇(PEG)和聚叠氮缩水甘油醚(GAP)为反应性黏结体系,设计了2种含能油墨。采用双喷头组合打印方式,制备了原位聚氨酯网络交联的含能复合物(CGP),并对其交联反应结构、形貌结构、密度、力学性能及爆轰性能进行了试验研究。结果表明:PEG与GAP进行了有效的共聚交联;CGP复合物表面光滑、均匀,层间结构致密,成型密度为1.747kg·m^(-3)孔隙率为10%;其弹性模量和硬度分别为8.16GPa和0.162GPa,力学性能较单喷头打印有显著提升;其爆速为8539m/s,爆轰临界尺寸为1mm×0.086mm,爆轰性能优异。

In order to improve the deposition quality of energetic composites during inkjet printing process,two kinds of energetic inks were designed with hexanitrohexaazaisowurtzitane(CL-20)as the main explosive,polyethylene glycol(PEG)and polyglycidyl azide(GAP)as the reactive bonding system.CL-20 based energetic composite(CGP)with in-situ polyurethane network cross-linked was prepared by dual-nozzle combined printing,and the crosslinking reaction structure,morphology,density,mechanical properties and detonation properties of CGP were studied.The results show that PEG and GAP are effectively copolymerized and cross-linked;The surface of the CGP composite is smooth and uniform,and the interlayer structure is dense with forming density of 1.747 kg·mand porosity of 10%;The elastic modulus and hardness are 8.16 GPa and 0.162 GPa respectively,and the mechanical properties are significantly improved compared with those of single nozzle printing;The detonation properties are excellent with detonation velocity of 8539 m·sand the critical detonation size of 1 mm×0.086 mm.