Tuning reactivity of nanoaluminum with fluoropolymer via electrospray deposition

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• 作者：Hongtao Yang ; Chuan Huang ; Houhe Chen
• 关键词：Fluoropolymer ; Nanoaluminum ; Electrospray deposition ; Reactivity ; Energetic materials
• 刊名：Journal of Thermal Analysis and Calorimetry
• 出版年：2017
• 出版时间：March 2017
• 年：2017
• 卷：127
• 期：3
• 页码：2293-2299
• 全文大小：
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Physical Chemistry; Analytical Chemistry; Polymer Sciences; Inorganic Chemistry; Measurement Science and Instrumentation;
• 出版者：Springer Netherlands
• ISSN：1588-2926
• 卷排序：127

文摘

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.