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- W3082328441 abstract "Abstract Surface oxide (Al 2 O 3 ) of reactive fine aluminum (Al) particles for solid fuels, propellants, and brazing materials often restricted oxidative performance, though the passivation film acts to protect Al particles from exploding. Here, we report fine Al particles fully covered with a polytetrafluoroethylene (PTFE) layer instead of an Al 2 O 3 film on the surface. This advance is based on the introduction of strong Al–F bonds, known to be an alternative to the Al–O bonds of surface oxides. The DSC results on the PTFE-coated Al particles exhibit higher reactive-exothermic enthalpy energy (12.26 kJ g −1 ) than 4.85 kJ g −1 by uncoated Al particles. The artificial aging test of the PTFE layer on the Al particles show long-time stability to the external circumstance compared to those by Al 2 O 3 . The activation energy for oxidation was investigated from cyclic voltammetry assessment and the measured peak potentials of the anode curve for PTFE/Al (− 0.45 V) and uncoated Al (− 0.39 V) are achieved, respectively. This means that the PTFE layer is more stable against a sudden explosion of Al particles compared to Al 2 O 3 . These results are very useful given its capability to control both the reactivity and stability levels during the oxidation of Al particles for practical applications." @default.
- W3082328441 created "2020-09-08" @default.
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- W3082328441 date "2020-09-03" @default.
- W3082328441 modified "2023-10-17" @default.
- W3082328441 title "Synergetic enhancement in the reactivity and stability of surface-oxide-free fine Al particles covered with a polytetrafluoroethylene nanolayer" @default.
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- W3082328441 doi "https://doi.org/10.1038/s41598-020-71162-z" @default.
- W3082328441 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/7471686" @default.
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