Functionalized Carbon Nanotube Guided Growth of HMX Crystals with Improved Thermal Stability and Reduced Sensitivity

Zikangping Wang, Kunyu Xiong, Zhi Hua Xue, Qi Long Yan

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

This study focuses on the crystal growth of hybrid HMX crystals guided by functionalized carbon nanotubes (F-CNTs) acting as nucleation centers, leading to improved thermal stability and sensitivity. It has been shown that HMX would grow in a form of distinctive needle-like hybrid crystals due to strong interaction with one-dimensional F-CNTs. Notably, under the effect of 0.5 wt % of carbonyl functionalized CNTs, HMX crystals are formed with a length-diameter ratio of 23. Meantime, its decomposition Ea is 248.1 kJ·mol-1, 43% higher than that of HMX. Due to high conductivity and strength of CNTs, the resulting hybrid HMX crystals have 131% higher impact initiation energy compared to the pure ones. Hybrid crystal doped with 0.5 wt % fluorinated carbon nanotube demonstrates the highest heat release values at 1267 J·g-1, with an approximate 32% increase compared to pure HMX, and follows a random chain scission model (L2).

Original languageEnglish
Pages (from-to)9111-9120
Number of pages10
JournalCrystal Growth and Design
Volume23
Issue number12
DOIs
StatePublished - 6 Dec 2023

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