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Surfactant Assisted Self-assembly and Synthesis of Highly Uniform Spherical CL-20 Microparticles

Published online by Cambridge University Press:  22 March 2018

Kaifu Bian ,
Leanne Alarid ,
David Rosenberg  and
Hongyou Fan
Kaifu Bian
Affiliation:
Sandia National Laboratories, Albuquerque, New Mexico, 87106
Leanne Alarid
Affiliation:
Sandia National Laboratories, Albuquerque, New Mexico, 87106
David Rosenberg
Affiliation:
Sandia National Laboratories, Albuquerque, New Mexico, 87106
Hongyou Fan*
Affiliation:
Sandia National Laboratories, Albuquerque, New Mexico, 87106 The University of New Mexico Center for Micro-Engineered Materials, Department of Chemical and Biological Engineering, Albuquerque, New Mexico87131
*
*(Email: hfan@sandia.gov)
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Abstract

Morphological control of energetic materials (EM) is highly desired because ill-defined morphology arising from variations in processing method and supplier make it impossible to reproducibly engineer their physicochemical properties. As the most powerful, non nuclear energetic material to date, 2,4,6,8,10,12-hexanitro -2,4,6,8,10,12-hexaazaisowurtzitane (CL-20) has been the subject of significant interest for improved applications in military grade explosives. Here we report a new method for recrystallization of CL-20 from irregular bulk EMs using a surfactant assisted self-assembly process to produce uniform spherical micron-sized particles. Detailed electron microscopy studies indicate that surfactant plays a critical role in controlling CL-20 morphology. Combined X-ray diffraction and Raman spectroscopy results reveal that the resultant spherical CL-20 particles exhibit an orthorhombic β-phase crystal structure. This material is expected to display enhanced functional reproducibility due to its monodisperse nature as well as decreased shock sensitivity due to their sub-micron particle size.

Keywords

energetic materialmicrostructureparticulate
Type
Articles
Information
MRS Advances , Volume 3 , Issue 41: Nanomaterials , 2018 , pp. 2421 - 2427
Copyright
Copyright © Materials Research Society 2018 

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References

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