Research on Molding and Performance of CL-20/Polyurethane-based Composite Inkjet Printing
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摘要: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8 539m/s，爆轰临界尺寸为1mm×0.086mm，爆轰性能优异。
Abstract: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·m-3 and porosity of 10%; The elastic modulus and hardness are 8.16GPa and 0.162GPa respectively, and the mechanical properties are significantly improved compared with those of single nozzle printing; The detonation properties are excellent with detonation velocity of 8 539m·s-1 and the critical detonation size of 1mm × 0.086mm.
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