Environment‐Friendly Formation of High Energetic Nano‐Al/Fe₂O₃ Bilayer by Aqueous Electrophoretic Deposition

Abstract

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.

Integration of Gold Nanoparticles to Modulate the Ignitability of Nanothermite Films

“…Nanothermites have received increasing interest over the past 2 decades for additives in propellants, , combustion synthesis of advanced materials, − and on chips energetics. − Different nanothermite systems were produced by different approaches including ball-milling and vapor deposition technique to produce nanopowder mixtures ,− and core–shell structure and nanofoils. − Among them, fully dense Al/CuO multilayer materials represent an interesting system for both its potential applications and fundamental science perspectives. The former has spanned various areas including tunable initiation of secondary explosives ,, and joining, brazing, and sealing .…”

Simultaneously Altering the Energy Release and Promoting the Adhesive Force of an Electrophoretic Energetic Film with a Fluoropolymer

“…thermite films can be obtained by EPD. The parameters related to the EPD process such as electrode type, electrode distance, dispersive medium, surfactant, voltage, and deposition time of the deposited film have been investigated in detail . The surface of the deposited film can be kept flat, smooth, and even.…”

“…The parameters related to the EPD process such as electrode type, electrode distance, dispersive medium, surfactant, voltage, and deposition time of the deposited film have been investigated in detail. 15 The surface of the deposited film can be kept flat, smooth, and even. However, the surface of the film is easy to fall off, chapped, and gapped and exhibits other poor adhesion phenomena after being affected by strong external forces, such as extrusion, friction, vibration, etc., which is one of the problems to be solved urgently in the current EPD process of the energetic films.…”

Electrophoretic deposition of Al-CuOx thermite materials on patterned electrodes for microenergetic applications

“…EPD is actively used to create a wide variety of devicesfor medicine or electrochemical power sources [16]. In addition, in the field of energy the possibility of forming multicomponent energetic materials on the substrates surface has been repeatedly demonstrated [17][18][19][20]. EPD is a simple technique that allows the use of a variety of components, including nano-sized and nano-structured, to control material performance over a wide range.…”