Abstract
In order to improve the mechanical strength of micro-booster based on 3,4-dinitrofurazanofuroxan (DNTF), 2,4-toluene diisocyanate (TDI) was introduced into the composite binder of nitrocotton (NC) and glycidyl azide polymer (GAP). A full-liquid explosive ink containing DNTF, binder and solvent was printed layer by layer. By the polymer cross-linking technology, the inkjet printed sample with three-dimensional network structure was obtained. The morphology, crystal form, density, mechanical strength, thermal decomposition and micro scale detonation properties of the printed samples were tested and analyzed. The results show that the printed sample has a smooth surface and a dense internal microstructure, and the thickness of the single layer printing is less than 10 μm. Compared with the raw material DNTF, the thermal decomposition temperature and activation energy of the printed samples do not change significantly, indicating better thermal stability. The addition of curing agent TDI increases the mechanical properties and charge density of the energetic composites. The elastic modulus and hardness are increased by more than 20%. The charge density can attain 1.773 g·cm−3, which can reach 95.5% of the theoretical density. The critical detonation size of the sample can reach 1 mm × 0.01 mm or less and the detonation velocity can achieve 8686 m·s−1, which exhibits excellent micro-scale detonation ability.
Highlights
Based on advanced manufacturing and integration ideas, microelectronic systems, machinery systems and chemical energy systems are integrated into micro electro-mechanical systems (MEMS) with initiating function, which are known as MEMS pyrotechnics
The printability of explosive ink can be estimated by a dimensionless number Z, which is defined as Equation (1) [30,31,32,33]:1/2
The formulated explosive ink can meet the requirements of inkjet printing
Summary
Based on advanced manufacturing and integration ideas, microelectronic systems, machinery systems and chemical energy systems are integrated into micro electro-mechanical systems (MEMS) with initiating function, which are known as MEMS pyrotechnics. The MEMS detonation train is a typical application of MEMS pyrotechnics in ammunition It is mainly composed of micro energy transformer, micro initiating charge, MEMS charge slider and flyer subassembly, micro-scale booster explosive and so on. The micro-scale charge technology with high quality and high precision is a research focus on the field of MEMS initiator [16,17]. After the ink was cured, the detonation critical size and detonation velocity can reach 86 μm (0.51 mm charge width) and 7150 m·s−1, respectively. B. Li et al [21] designed various CL-20-based explosive ink formulations and respectively used direct writing technology to write them in micro grooves. The minimum detonation critical size could reach 0.17 mm (1 mm charge width) and the detonation velocity was up to 8000 m·s−1
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
