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Tuning reactivity of nanoaluminum with fluoropolymer via electrospray deposition

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Abstract

Polyvinylidene fluoride (PVDF) is a potential oxidizer for aluminum powders as well as an excellent binder. The strong electronegative fluorine within the polymer can react with the alumina passivation shell surrounding an aluminum (Al) particle to promote Al particle reactivity. In this study, nanoaluminum (n-Al)/PVDF microsphere particles with diameters of between 1 and 5 μm were successfully prepared with PVDF content of 5, 10 and 15 % by mass using the electrospray deposition method. Thermogravimetric–differential scanning calorimetric analysis shows more intense heat release process (the sharper exothermic peak) compared to n-Al. The combustion properties tested in open air show that all samples can be ignited, while the n-Al/PVDF demonstrated more active reactivity in comparison with n-Al. The burning duration decreases from 3.51 s to 219 ms as the PVDF concentration increases. The work, which shows that using electrospray deposition fabricates the spherical particles consisting of n-Al and reactive binder, expects an approach to the promising n-Al in energetic materials.

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Authors and Affiliations

  1. School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing, 210094, People’s Republic of China

    Hongtao Yang & Houhe Chen

  2. Institute of Chemical Materials, China Academy of Engineering Physics, Mianyang, 621900, People’s Republic of China

    Chuan Huang

Authors
  1. Hongtao Yang
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  2. Chuan Huang
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  3. Houhe Chen
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Correspondence to Hongtao Yang.

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Yang, H., Huang, C. & Chen, H. Tuning reactivity of nanoaluminum with fluoropolymer via electrospray deposition. J Therm Anal Calorim 127, 2293–2299 (2017). https://doi.org/10.1007/s10973-016-5801-3

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  • DOI: https://doi.org/10.1007/s10973-016-5801-3

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