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Thermal decomposition and sensitivities of RDX/SiO2 nanocomposite prepared by an improved supercritical SEDS method

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Abstract

A kind of classic nanocomposite, in which nano-RDX (~60 nm) was embedded inside as the core and nano-SiO2 (~6 nm) compactly coated on its surface, was successfully prepared by an improved supercritical SEDS method. Therein, a special design of the nozzle made the fabrication realized. Analyses, such as SEM, TEM, XRD, IR, and XPS, were employed to investigate the micron morphology and structure of the nanocomposite. Thermal analysis was also conducted, and the DSC traces collected at different heating rate were obtained. Using these DSC data, we calculated the kinetic and thermodynamic parameters for thermal decomposition of raw RDX, RDX/SiO2 nanocomposite, and a simple mixture ([RDX + SiO2]), by which the characteristic of the decomposition was depicted clearly. It was confirmed that for different samples, the parameters such as E K, ΔH ≠, and T b changed remarkably. Meanwhile, the decomposition products were also probed with DSC-IR analysis. The results indicated that the main products for both raw RDX and RDX/SiO2 were CO2, N2O, and NO2. However, the detected signal intensity of NO2 for RDX/SiO2 was much stronger than that for raw RDX. In addition, testing of mechanical sensitivity disclosed that RDX/SiO2 was far more insensitive than raw RDX, and then the mechanism about this was discussed.

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Acknowledgements

This research was supported by the National Natural Science Foundation of China (Grant No.: 51206081; Recipient: Yi Wang).

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Authors and Affiliations

  1. School of Chemical Engineering and Environment, North University of China, Taiyuan, 030051, China

    Jun Zhang, Yucun Liu, Xiaolian Zhang, Ruihao Wang & Jinglin Zhang

  2. Hubei Space Sanjiang Honglin Detection and Control Co. Ltd, Xiaogan, 432000, China

    Jun Zhang, Yu Fan & Jineng Xu

  3. School of Materials Science and Engineering, North University of China, Taiyuan, 030051, China

    Yi Wang

Authors
  1. Jun Zhang
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  2. Yucun Liu
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  3. Xiaolian Zhang
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  4. Yu Fan
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  5. Jineng Xu
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  6. Ruihao Wang
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  7. Yi Wang
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  8. Jinglin Zhang
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Correspondence to Jun Zhang or Yucun Liu.

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Zhang, J., Liu, Y., Zhang, X. et al. Thermal decomposition and sensitivities of RDX/SiO2 nanocomposite prepared by an improved supercritical SEDS method. J Therm Anal Calorim 129, 733–741 (2017). https://doi.org/10.1007/s10973-017-6210-y

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  • DOI: https://doi.org/10.1007/s10973-017-6210-y

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