Formulation of CL‐20‐Based Explosive Ink and Its Detonating Transfer Performance in Micro‐Size Charge

Li, Qianbing; An, Chongwei; Peng, Jinyu; Xu, Chuanhao; Guo, Hao; Wang, Shuang; Ye, Baoyun

doi:10.1002/prep.201900015

Cited by 15 publications

(5 citation statements)

References 21 publications

(36 reference statements)

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“…In Figure 8b, the detonation distance is determined as 99.5 mm. It is calculated that the critical thickness of detonation of GNT printed samples is 0.015 mm by the reported method [42]. Therefore, GNT printed samples can be stably detonated at micron charge and has a good application prospect in the micro-initiation system.…”

Section: Critical Thickness Of Detonationmentioning

confidence: 99%

Inkjet Printing of GAP/NC/DNTF Based Microscale Booster with High Strength for PyroMEMS

Guo

Long

et al. 2020

Micromachines

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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.

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Section: Critical Thickness Of Detonationmentioning

confidence: 99%

Inkjet Printing of GAP/NC/DNTF Based Microscale Booster with High Strength for PyroMEMS

Guo

Long

et al. 2020

Micromachines

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“…Therefore, the detonation trace value is slightly larger than the actual value. Although this method has certain limitations, it can qualitatively demonstrate the explosive transmission ability and has a certain reference value [32][33].…”

Section: Detonation Velocitymentioning

confidence: 99%

“…However, the oil phase in oil-in-water emulsions may employ ester as solvents [19][20][21]. Li [22] used PVA in the aqueous phase and Viton in the oil phase to prepare an oil-in-water emulsion with high emulsion stability, strong resistance of the explosive ink viscosity to external environmental disturbances, excellent printing performance, and the critical detonation transmission dimensions of only 0.3 × 0.3 mm were realized. Xie [23] used PVA aqueous solution as the aqueous phase and Glycidyl Azide Polymer(GAP)ethyl acetate solution as the oil phase.…”

Section: Introductionmentioning

confidence: 99%

“…PVA is a polymer material that is soluble in water but almost insoluble in organic solvents. It has excellent film‐forming properties as an adhesive and finds extensive use in the field of adhesives for energetic materials [17, 22, 26, 27]. FEVE has excellent mechanical properties as a coating in the construction field and also has superb weathering durability.…”

Section: Introductionmentioning

confidence: 99%

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Design of TDI modified oil‐in‐water emulsion and its application in explosive ink

Han

Xie²,

Deng

et al. 2023

Propellants Explo Pyrotec

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In order to solve the short stabilization time of the water‐in‐oil emulsion binder system and the shortcomings of the critical blast size of the explosive ink molding sample, a water‐in‐oil emulsion binder was designed with polyvinyl alcohol (PVA) aqueous solution as the aqueous phase, fluorocarbon resin (FEVE) ethyl acetate solution as the oil phase, and toluene diisocyanate (TDI) added to modify the water‐in‐oil emulsion binder. The hexanitrohexaazaisowurtzitane(CL‐20)based explosive ink was made by incorporating submicron CL‐20 into the binder system, and the print‐formed samples were tested for microscopic morphology, crystallographic analysis, mechanical susceptibility, and detonation transmission performance. The results showed that the explosive ink‘s viscosity was moderate and suitable for direct printing, and the formed sample‘s surface particles were uniformly dispersed and had a honeycomb structure. The crystal form of CL‐20 explosive in the explosive ink did not change, the molded sample‘s impact and frictional sensitivities were 1 J and 32 N lower than those of submicron CL‐20, respectively, and the detonation velocity of the molded sample was 6655 m/s. The critical detonation size and critical detonation thickness were 1×0.0078 mm and 0.1 mm, respectively, and a critical detonation corner turning of 90°–160° could be achieved. The results show that the prepared binder system is stable for a long time, and the explosive ink molding samples have excellent blast transmission performance.

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“…DIW can print complex patterns quickly by computer programming and precision machinery. This technique possesses great efficiency advantages for the charge of multipoint initiation explosive networks, while explosive ink is the core materials for DIW [17,18]. In this study, a LLM-105-based explosive ink was prepared, and the multipoint initiation explosive networks were loaded by DIW.…”

Section: Introductionmentioning

confidence: 99%

Preparation of LLM‐105‐Based Explosive Ink and Its Detonating Transfer Performance in Explosive Network

Cai

Luo

Huang

et al. 2022

Propellants Explo Pyrotec

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A new explosive ink based on 2,6-diamino-3,5-dinitropyrazine-1-oxide (LLM-105) was designed and prepared. The explosive ink was deposited into micro-size grooves by using direct ink writing (DIW) technology and its detonation properties in an explosive network were explored. The properties of impact sensitivity, detonation velocity and critical size of detonation were determined and analyzed. The results show that this explosive has a good impact safety. When the LLM-105 content is 88 % and the density is 95 % TMD, the detonation velocity and critical size of detonation values are 7,771 m/s and 0.5 × 0.5 mm respectively. Moreover detonation velocity results indicated the explosive ink in micro-size grooves loaded by DIW was uniform.

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Formulation of CL‐20‐Based Explosive Ink and Its Detonating Transfer Performance in Micro‐Size Charge

Cited by 15 publications

References 21 publications

Inkjet Printing of GAP/NC/DNTF Based Microscale Booster with High Strength for PyroMEMS

Inkjet Printing of GAP/NC/DNTF Based Microscale Booster with High Strength for PyroMEMS

Design of TDI modified oil‐in‐water emulsion and its application in explosive ink

Preparation of LLM‐105‐Based Explosive Ink and Its Detonating Transfer Performance in Explosive Network

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