Journal
ULTRASONICS SONOCHEMISTRY
Volume 21, Issue 4, Pages 1349-1357Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.ultsonch.2014.02.010
Keywords
Safety; Ultrasound; Core-shell; High-energy-density materials; Sensitivity
Categories
Funding
- National Natural Science Foundation of China (NSFC) [11202193, 11272292, 11372288, 11372289, 11372290, 11172275, 11172276, 21172203, 11072225]
- Key Foundation of China Academy of Engineering Physics [2012A0302013]
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To improve the safety of sensitive explosive HMX while maintaining explosion performance, a moderately powerful but insensitive explosive TATB was used to coat HMX microparticles via a facile ultrasonic method. By using Estane as surface modifier and nano-sized TATB as the shell layer, the HMX@TATB core-shell microparticles with a monodisperse size and compact shell structure were successfully constructed. Both scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS) results confirmed the formation of perfect core-shell structured composites. Based on a systematic and comparative study of the effect of experimental conditions, a possible formation mechanism of core-shell structure was proposed in detail. Moreover, the perfect core-shell HMX@TATB microparticles exhibited a unique thermal behavior and significantly improved mechanical sensitivity compared with that of the physical mixture. (C) 2014 Elsevier B.V. All rights reserved.
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