Application of inkjet printing using micro-nano CL-20-based PVA colloidal suspension with desensitization to MEMS-based pyrotechnics

IF 3.3 Q2 CHEMISTRY, MULTIDISCIPLINARY
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引用次数: 0

Abstract

The micro-scale detonation sequence prepared by the inkjet printing using all-liquid 2,4,6,8,10,12-hexanitro-2,4,6,8,10,12-hexaazawurtzitan (CL-20)-based energetic inks enables the micro-space fine-scale assembly and stable propagation of detonation. However, the easy crystallization and high mechanical sensitivity of all-liquid CL-20 limit its applications to the microelectromechanical system (MEMS)-based pyrotechnics. This study developed a simple micro-nano CL-20-based polyvinyl alcohol (PVA) colloidal suspension suitable for inkjet printing to control the crystal structures and mechanical sensitivities of energetic composites. The results show that the CL-20-based multilayer films formed by inkjet printing had dense microstructures, with the porosity decreasing to 13.81% and ε-type crystals. Compared with micro-nano CL-20 particles, the impact and friction sensitivities of CL-20-based multilayer films were reduced by 100% and 122%, respectively, and their apparent activation energy increased by 44.7 ​kJ ​mol−1, thus effectively improving the safety performance of micro-nano structured explosive agents. Therefore, CL-20-based multilayer films have great potential for application to the micro-scale detonation sequence of MEMS.

Abstract Image

Abstract Image

微纳CL-20基PVA胶体悬浮液对MEMS烟火减敏喷墨打印的应用
使用全液体 2,4,6,8,10,12-hexanitro-2,4,6,8,10,12-hexaazawurtzitan (CL-20)基高能油墨进行喷墨打印制备的微尺度引爆序列可实现微空间精细组装和引爆的稳定传播。然而,全液体 CL-20 的易结晶性和高机械敏感性限制了其在基于微机电系统 (MEMS) 的烟火中的应用。本研究开发了一种适合喷墨打印的基于 CL-20 的聚乙烯醇(PVA)胶体悬浮液,用于控制高能复合材料的晶体结构和机械灵敏度。结果表明,通过喷墨打印形成的基于 CL-20 的多层膜具有致密的微观结构,孔隙率降至 13.81%,并具有ε型晶体。与微纳 CL-20 颗粒相比,CL-20 基多层膜的冲击敏感性和摩擦敏感性分别降低了 100%和 122%,表观活化能提高了 44.7 kJ mol-1,从而有效提高了微纳结构爆炸药的安全性能。因此,CL-20 基多层膜在微米尺度的微机电系统起爆序列中具有很大的应用潜力。
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来源期刊
Energetic Materials Frontiers
Energetic Materials Frontiers Materials Science-Materials Science (miscellaneous)
CiteScore
6.90
自引率
0.00%
发文量
42
审稿时长
12 weeks
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