A Novel Method to Prepare Nano‐sized CL‐20/NQ Co‐crystal: Vacuum Freeze Drying. Issue 8 (2nd May 2017) - Gao, Han
Abstract: Nano‐sized energetic co‐crystal consisting of the most powerful used military explosive 2, 4, 6, 8, 10, 12‐hexanitro‐2, 4, 6, 8, 10, 12‐hexaazaisowurtzitane (CL‐20) and a typical insensitive explosive used in propellants nitroguanidine (NQ) was prepared by vacuum freeze drying method. Material studio 6.1 was used to simulate the hydrogen bonds between CL‐20 and NQ molecules. Scanning electron microscopy (SEM) was used to reveal the morphology and size of the product. Fourier Transform infrared spectroscopy (FT‐IR) and X‐ray diffraction spectrum (XRD) proved the formation of the co‐crystal at the molecular level. Differential scanning calorimetry (DSC) was employed to characterize the thermal behavior of the co‐crystal. The result of mechanical sensitivity test indicated the sensitivity was effectively reduced compared to neat CL‐20. Abstract :