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Emulsion synthesis of CL-20/DNA composite with excellent superfine spherical improved sensitivity performance via a combined ultrasonic–microwave irradiation approach

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Abstract

An advanced emulsion method was developed via combined ultrasound-microwave irradiation and utilized for the crystallization of 2,4,6,8,10,12-hexanitro-2,4,6,8,10,12-hexaazaisowurtzitane (CL-20) and 2,4-dinitroaniline (DNA) spherical composite, which had been successfully fabricated with molar ratio of 1:1, The morphology and structure of the products were fully characterized using field emission scanning electron microscopy, powder X-ray diffraction, Fourier transform infrared spectroscopy. The thermal stability of micro structure was closely investigated via differential scanning calorimetry, and sensitivity performance was tested. The results suggested that the surface of particle was glazed while particle with narrow size distribution were produced. Remarkably, the drop height of 50% explosion probability data showed insensitivity compared to the previously reported energetic composites, which data was up to 57.8 cm. Besides, some experimental conditions including the amount of surfactant gelatin (0–1.2 wt% of accounting for the mass of CL-20) and standing time were examined. It was found that the greater the concentration of surfactant, the more conducive to the formation of emulsion, and standing time had a dramatically significant effect on the particle size. Summarily, the present process involving an initial powder made it possible to obtain micro spherical composite with ideal impact sensitivity, compared to those produced by conventional methods.

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Acknowledgements

This work was supported by the Doctoral Program of Southwest University of Science and Technology (SWUST) [Grant Number 14zx7105]; and China Academy of Engineering Physics (CAEP) [Grant Number 15zh0058].

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Authors and Affiliations

  1. Sichuan Co-Innovation Center for New Energetic Materials, Southwest University of Science and Technology (SWUST), Mianyang, 621010, China

    Yanfang Zhu, Yuewen Lu, Hua Li, Bing Gao, Dunju Wang, Xingquan Zhang & Changping Guo

  2. College of Chemistry, Key Laboratory of Environment-Friendly Chemistry and Applications Ministry of Education, Xiangtan University, Xiangtan, 411105, China

    Jing Luo

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  1. Yanfang Zhu
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  2. Jing Luo
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  3. Yuewen Lu
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  4. Hua Li
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  6. Dunju Wang
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  7. Xingquan Zhang
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  8. Changping Guo
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Correspondence to Changping Guo.

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Zhu, Y., Luo, J., Lu, Y. et al. Emulsion synthesis of CL-20/DNA composite with excellent superfine spherical improved sensitivity performance via a combined ultrasonic–microwave irradiation approach. J Mater Sci 53, 14231–14240 (2018). https://doi.org/10.1007/s10853-018-2644-2

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  • DOI: https://doi.org/10.1007/s10853-018-2644-2

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