Add time:07/30/2019         Source:sciencedirect.com

Iodine oxides are of significant interest as strong oxidizers in energetic formulation that also operate as iodine release agents for neutralization of spores using strong thermal pulses. In this paper incorporation of carbon black (CB) as the main fuel or additive into iodine oxides-based energetic materials are shown to lower both initiation and iodine release temperatures compared to those of Al/iodine oxides and Ta/iodine oxides thermites. Those lowering effects were triggered by a condensed phase CB-iodine oxides reaction explored by high heating rate time-resolved temperature-jump time-of-flight mass spectrometry and low heating rate thermogravimetric analysis/differential scanning calorimetry results. We observe that other carbon allotropes, such as carbon nanotubes and functionalized graphene sheets, also feature the similar effect as CB. Fourier transform infrared spectroscopy analysis shows that the presence of CB lowered the bond energy of iodine oxide on the surface to trigger the CB-iodine oxide initiation at a relatively lower temperature.

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