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The potentials of TiO2 nanocatalyst on HMX thermolysis

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Abstract

Even though HMX is one of the most powerful highly explosive materials; HMX-based propellants demonstrated complexity of burning rate control as well as high pressure exponent (n). In addition, HMX is insensitive to common catalyst. TiO2 can offer novel catalyzing ability for HMX. Highly-crystalline, mono-dispersed TiO2 NPs of 5.0 nm particle size with proper surface area (26.87 ± 0. 36 m2/g) were fabricated using hydrothermal processing. TiO2 NPs were re-dispersed in organic solvent and effectively-integrated into HMX via co-precipitation technique; the impact of TiO2 NPs on HMX thermal behavior was investigated using DSC and TGA. TiO2 NPs exposed superior catalytic performance; the endothermic phase change of HMX at 187 °C was decreased by 43.3%. The main exothermic decomposition peak was decreased by 10 °C with enhanced total heat release by 46.7%. The catalytic performance of TiO2 NPs could be ascribed to the release of active surface ȮH radicals that could induce HMX decomposition via hydrogen abstraction. Furthermore, TiO2 NPs could adsorb evolved NO2 on its surface with surge in total heat release in condensed phase.

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Authors and Affiliations

  1. Head of Nanotechnology Research Center, Military Technical College (MTC), Cairo, Egypt

    Sherif Elbasuney

  2. School of Chemical Engineering, Military Technical College (MTC), Egyptian Armed Forces, Cairo, Egypt

    Sherif Elbasuney & Gharieb S. El-Sayyad

  3. Drug Radiation Research Department, National Center for Radiation Research and Technology (NCRRT), Egyptian Atomic Energy Authority (EAEA), Cairo, Egypt

    Gharieb S. El-Sayyad

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  1. Sherif Elbasuney
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Elbasuney, S., El-Sayyad, G.S. The potentials of TiO2 nanocatalyst on HMX thermolysis. J Mater Sci: Mater Electron 31, 14930–14940 (2020). https://doi.org/10.1007/s10854-020-04054-7

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