Table of Contents Author Guidelines Submit a Manuscript
Journal of Nanomaterials
Volume 2017 (2017), Article ID 3791320, 7 pages
https://doi.org/10.1155/2017/3791320
Research Article

Nano-CL-20/HMX Cocrystal Explosive for Significantly Reduced Mechanical Sensitivity

School of Chemical and Environmental Engineering/Shanxi Engineering Technology Research Center for Ultrafine Powder, North University of China, Taiyuan, Shanxi 030051, China

Correspondence should be addressed to Hequn Li; moc.361@0361736qhl

Received 8 December 2016; Revised 5 January 2017; Accepted 10 January 2017; Published 29 January 2017

Academic Editor: Jean M. Greneche

Copyright © 2017 Chongwei An et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Spray drying method was used to prepare cocrystals of hexanitrohexaazaisowurtzitane (CL-20) and cyclotetramethylene tetranitramine (HMX). Raw materials and cocrystals were characterized using scanning electron microscopy, X-ray diffraction, differential scanning calorimetry, Raman spectroscopy, and Fourier transform infrared spectroscopy. Impact and friction sensitivity of cocrystals were tested and analyzed. Results show that, after preparation by spray drying method, microparticles were spherical in shape and 0.5–5 µm in size. Particles formed aggregates of numerous tiny plate-like cocrystals, whereas CL-20/HMX cocrystals had thicknesses of below 100 nm. Cocrystals were formed by C–HO bonding between –NO2 (CL-20) and –CH2– (HMX). Nanococrystal explosives exhibited drop height of 47.3 cm, and friction demonstrated explosion probability of 64%. Compared with raw HMX, cocrystals displayed significantly reduced mechanical sensitivity.