Interfacial engineering endowing energetic co-particles with high density and reduced sensitivity

Xu Zhao, Menghua Zhang, Wen Qian, Feiyan Gong, Jiahui Liu, Qinghua Zhang, Zhijian Yang

Research output: Contribution to journalArticlepeer-review

49 Scopus citations

Abstract

Interface regulating is considered as a promising approach for optimizing the energy and safety performance of energetic materials (EMs). Nevertheless, realizing effective promotion of safety performance meanwhile maintaining a high energy level is still a big challenge to energetic 1,3,5,7-tetranittro-1,3,5,7-tetrazocane (HMX). Herein, novel energetic composites proposed by introducing 2,4,6 trinitrobenzene-1,3,5-triamine (TATB) at the HMX interface (denoted as HMX/TATB co-particles, cp-HMX/TATB) have been achieved by a simple hydrothermal assembly. High HMX mass contents (90%) in co-particle ensure high energy levels. Experimental and molecular dynamics simulation suggested the coupling of nitro-group in HMX and amino-group in TATB is the main driving force for the strong interfacial contact along specific crystalline directions, endowing tightly interfacial contact and assembly with low porosity. Integrated cp-HMX/TATB demonstrated enhanced crystal density and fast decomposition kinetics. Moreover, resultant energetic cp-HMX/TATB deliver superior Bundesanstalt-für-Materialforschung (BAM) sensitivities (impact: 65 J, friction: 288 N) amongst reported HMX-based EMs and much improved detonation velocity and pressure of 9173.35 m s−1 and 39.65 GPa, respectively, indicating a combination of efficient desensitization and high energy level. Detailed understanding of the interface properties in high-energy explosives generated by the interfacial engineering sheds lights on the design of efficient energetic material system with high energy and favorable safety.

Original languageEnglish
Article number124209
JournalChemical Engineering Journal
Volume387
DOIs
StatePublished - 1 May 2020
Externally publishedYes

Keywords

  • Energetic co-particles
  • High crystal density
  • Improved detonation performance
  • Low sensitivity

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