In this study, nano-Al/Fe 2 O 3 bilayer was successfully formed via aqueous electrophoretic deposition (EPD) route for the first time. For this formation, the first layer of nano-Fe 2 O 3 was prepared by EPD using the bi-additive of 0.015 mM HCl + 10 mg L À 1 PEI, and then the second layer of nano-Al was immediately prepared by EPD using 5 mg L À 1 PEI as additive. The electrophoretic nano-Al/Fe 2 O 3 bilayer had high heat release of~2800 J g À 1 and exhibited good combustion performance. In comparison with the previous work realized by using organic-solvent-EPD, we believe this study can pave a new way for preparing the bilayers of nanothermites or metallic reactive materials by more costeffective and environment-friendly aqueous EPD route. Figure 11. Combustion behavior for a nano-Al/Fe 2 O 3 bilayer sample. The insert is the combustion sample prepared by depositing nano-Al/ Fe 2 O 3 bilayer onto resistance wire.
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