摘要
为考察氟碳树脂(FEVE)在炸药油墨中的应用效果,以聚乙烯醇(PVA)水溶液为水相,FEVE乙酸乙酯溶液为油相,设计了一种新型水包油乳液型黏结体系,并加入亚微米ε‐CL‐20颗粒,配制CL‐20基炸药油墨进行直写技术打印。采用扫描电子显微镜、流变测试仪、X射线衍射仪、撞击和摩擦感度测试仪对打印成型样品进行形貌表征和传爆性能测试。结果表明,PVA/FEVE水包油乳液型黏结剂体系稳定存在时间可达174 h。90%固含量的CL‐20的炸药油墨流变性能最佳,具有良好的可打印性。所得直写打印成型样品表面光滑,为多微孔内部结构,CL‐20炸药晶型仍为ε型。打印样品的撞击能和摩擦力分别为216 N和4.5 J,相比原料ε‐CL‐20,撞击感度和摩擦感度分别降低了125%和200%。打印样品的爆速、临界传爆拐角、1 mm线宽临界传爆厚度和方形截面临界传爆尺寸分别为6772 m·s^(-1)、160°、0.039 mm和0.4 mm×0.4 mm,具有优异的微尺度传爆能力。
In order to investigate the application effect of fluorocarbon resin(FEVE)in explosive ink,a new type of oil-in-water emulsion bonded system was designed by employing polyvinyl alcohol(PVA)aqueous solution as water phase and FEVE/ethyl acetate solution as oil phase.By adding sub-micron CL-20 particles into bonded system,CL-20-based explosive ink was prepared for direct writing.Scanning electron microscope,rheometer,X-ray diffractometer,and impact and friction sensitivity tester were used to characterize morphology and detonation performance of printed samples.The results show that PVA/FEVE oil-in-water emulsion binder system can stably exist for 174 h.The CL-20 explosive ink with 90%solid content exhibits optimal rheological properties and good printability.The obtained direct writing sample with microporous internal structure displays a smooth surface,and the crystal form of CL-20 explosive is stillεtype.The impact energy and friction force of printed samples are 216 N and 4.5 J,respectively.Compared with rawε-CL-20,impact sensitivity and friction sensitivity of printed samples are reduced by 125%and 200%,respectively.The detonation velocity,critical detonation corner turning,critical detonation thickness of 1-mm line width,and critical detonation size of square section of printed samples are 6772 m·s^(-1),160°,0.039 mm,and 0.4 mm×0.4 mm,respectively,which show excellent micro-scale detonation capability.
作者
韩凯
丁任琪
李连强
张梦龙
安崇伟
刘意
谢占雄
HAN Kai;DING Ren-qi;LI Lian-qiang;ZHANG Meng-long;AN Chong-wei;LIU Yi;XIE Zhan-xiong(School of Environment and Safety Engineering,North University of China,Taiyuan 030051,China;Weapons Industry Health Research Institute,Xian 710000,China)
出处
《含能材料》
EI
CAS
CSCD
北大核心
2022年第9期911-919,共9页
Chinese Journal of Energetic Materials
基金
装备预先研究领域基金项目资助(80919010702)。
关键词
炸药油墨
氟碳树脂
直写技术
机械感度
传爆性能
explosive ink
fluorocarbon resin
direct ink writing
mechanical sensitivity
detonation performance
