Ball Milling Produced FeF3‐Containing Nanothermites: Investigations of Its Thermal and Inflaming Properties. Issue 43 (26th November 2019)

• Record Type: Journal Article
• Authors: Jiang, Aifeng; Xia, Debin; Li, Mengru; Qiang, Liangsheng; Fan, Ruiqing; Lin, Kaifeng; Yang, Yulin
• Is Part Of: ChemistrySelect. Volume 4:Issue 43(2019)
• Page Start: 12662
• Page End: 12667
• Publication Date: 2019-11-26
• Subjects: nanothermites -- ball-milling process -- FeF3 -- hydrophobic angle -- burning rate; Chemistry -- Periodicals; 540.5
• DOI: 10.1002/slct.201902736
• Languages: English
• ISSNs: 2365-6549

Abstract

Abstract: Thermites are widely employed in explosives and propellants. However, it is difficult to fabricate nanothermites with low cost, nanoscale size and large production simultaneously. In this work, we employed ball milling process to manufacture varying ratio of FeF3 ‐containing nanothermites in a large scale. The obtained nanothermites presented excellent stability and were characterized by X‐ray diffraction, nitrogen adsorption‐desorption isotherms and scanning electron microscopy. The nanothermites particles could be optimized into nearly spherical shape together with an average diameter of 23.2 nm and a specific surface area of 26.33 m 2 /g. Moreover, the thermal stabilities, hydrophobicities and combustion properties were also symmetrically investigated via thermogravimetric analysis, hydrophobic angle test and infrared temperature measurement, showing that the vinyltrimethoxysilane covered FeF3 ‐containing nanothermites displayed similar hydrophobicity, lower initial oxidation temperatureand faster burning rate, respectively, compared to the ball‐milled aluminum nanoparticles. Abstract : FeF3 ‐containing nanothermites were successfully prepared via ball milling technique and covered by vinyltrimethoxysilane. Through modifying the doped amounts of FeF3, the optimal products with 17 wt% FeF3 were obtained and present nearly spherical shape together with an average diameter of 23.2 nm. In additon, huge specific surface area of 26.33 m 2 /g, excellent hydrophobicity, lower initial oxidation temperature and higher burning rate were also observed.