Tuning the mechanical performance efficiently of various LLM-105 based PBXs via bioinspired interfacial reinforcement of polydopamine modification

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • Congmei Lin
  • Yushi Wen
  • Zhijian Yang
  • Feiyan Gong
  • Xu Zhao
  • Shilong Hao
  • Liping Pan
  • Ling Ding
  • Jiang Li
  • Shaoyun Guo

Related Research Unit(s)

Detail(s)

Original languageEnglish
Article number107824
Journal / PublicationComposites Part B: Engineering
Volume186
Online published29 Jan 2020
Publication statusPublished - 1 Apr 2020

Abstract

Inspired by mussel adhesion, the self-polymerization of dopamine was adopted to coat 2,6-diamino-3,5-dinitropyrazine-1-oxide (LLM-105) crystals with different crystal characteristics. It has been demonstrated that the crystal quality and surface roughness played a crucial role in mechanical sensitivity and bioinspired interfacial reinforcement of LLM-105 based energetic composites. The high crystal quality brought benefits for the safety performances of polydopamine (PDA) modified LLM-105 crystals, with the drop height of 50% explosion probability (H50) higher than 112.2 cm. After PDA coating for 6 h, the compressive and tensile strength of LLM-105 based polymer bonded explosives (PBXs) could be improved by 27%–52% and 47%–100%, respectively. The enhancing effect in mechanical properties was more pronounced for LLM-105 crystals with smooth surface, due to the physical “interlocking block” at the interface induced by the increase of surface roughness after PDA modification. The overall results indicated that PDA coating had great potential in improving the mechanical properties of different LLM-105 based PBXs while maintaining safety performance.

Research Area(s)

  • 2,6-Diamino-3,5-dinitropyrazine-1-oxide (LLM-105), Bio-inspired interfaces, Crystal characteristics, Mechanical properties, Sensitivity

Citation Format(s)

Tuning the mechanical performance efficiently of various LLM-105 based PBXs via bioinspired interfacial reinforcement of polydopamine modification. / Lin, Congmei; Wen, Yushi; Huang, Xiaona; Yang, Zhijian; Gong, Feiyan; Zhao, Xu; Hao, Shilong; Pan, Liping; Ding, Ling; Li, Jiang; Guo, Shaoyun.

In: Composites Part B: Engineering, Vol. 186, 107824, 01.04.2020.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review