Preparation and Properties of CL‐20 based Composite by Direct Ink Writing

Abstract

Direct ink writing (DIW) is a new trend in the micro-scale charging of energetic materials. In this study, a CL-20 based composite was prepared using DIW, and its properties were characterized. Results indicated that the particles of the composite are found at the sub-micron level, and a single layer measures at 2.4 mm. The composite has high density and low impact sensitivity, and its critical detonation size is around 1 3 0.4 mm. This feature will contribute to the detonation at the micro levelto a certain degree.

Direct Ink Writing of DNTF Based Composite with High Performance

“…The ink was then poured into the syringe of piezoelectric nozzle (produced by Nordson EFD, LIC) after 5 minutes of ultrasonic concussion and filtration. The platform of DIW was consistent with our previous work [13]. The pulse, circulation, and stoke parameters of the piezoelectric nozzle were 0.3 ms, 5.0 ms and 52 %, respectively.…”

“…Finally, the only materials waste generated in the process is the solvent lost to evaporation [11]. In our previous work, CL-20 based composite was prepared with whose density reached 86 % of theoretical maximum density (TMD) and critical size of detonation stayed around 1 3 0.4 mm under the constraint of organic glass [13]. Nevertheless, the crystal form of CL-20 changed, resulting in some safety problems in application.…”

CL‐20 based Explosive Ink of Emulsion Binder System for Direct Ink Writing

“…In 2010, EDF-11,a CL-20 based secondary explosive ink, which has been developed for direct write loading of MEMS devices and used as a booster explosive by the US Army [9]. Since then, some formulations about CL-20 based explosive inks with good performance had been studied [10][11][12][13].…”

Progress in Additive Manufacturing of Energetic Materials: Creating the Reactive Microstructures with High Potential of Applications

“…Experiments where several layers with a total thickness up to 150 μm were deposited reveal that some morphological features of the previous layer are adopted by the next layer. An and coworkers [70][71][72] reported inkjet printing using allliquid inks based on PETN, CL-20 and 3,4-dinitrofurazanofuroxan with a theoretical maximum density (TMD) of up to 93 % and detonated printed samples below 1 mm thickness. The latest result is 97 % TMD with ink being the solution of two explosives, 3,4-bis(4-nitro-1,2,5-oxadiazol-3-yl)-1,2,5-oxadiazole-2-oxide (BNFF or DNTF) and RDX, and two binders, GAP and ethyl cellulose [67].…”