Integrating micro-ignitors with Al/Bi2O3/graphene oxide composite energetic films to realize tunable ignition performance

Abstract

The integration of composite energetic films (CEFs) with various types of initiators can effectively adjust their performance and represents potential applications in microscale energy-demanding systems. In this study, the Al/Bi2O3/graphene oxide (GO) CEFs were successfully integrated into copper micro-ignitors by electrophoretic deposition, a low-cost and time-saving method. The effects of the Al/Bi2O3/GO CEFs with different GO contents on exothermic performance and ignition properties of micro-ignitors were then systematically investigated in terms of heat release, activation energy, ignition duration, the maximum height of the ignition product, and ignition delay time. The results showed that the addition of GO promoted more heat releases and higher activation energies of Al/Bi2O3/GO CEFs. The addition of ≤3.5 wt. % GO prolonged the ignition duration from 450 μs to 950 μs and increased the maximum height of the ignition product from about 40 mm to 60 mm. However, the micro-ignitors with more than 3.5 wt. % GO cannot be ignited, which suggested that GO played a contradictory role in the ignition properties of micro-ignitors and the controlled GO content was a prerequisite for improved ignition performance. The ignition delay time gradually extended from 10.7 μs to 27.6 μs with increases in the GO contents of Al/Bi2O3 CEFs, revealing that an increase in the weight ratio of GO leads to lower ignition sensitivity of micro-ignitors.

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

“…The Al/CuO film with low adhesion also can ignite B-KNO 3 , but with a low level of self-propagation. These results highlight the fact that the Al/NFs/CuO coating has considerable potential for use as an ignition material in microignitors …”

“…These results highlight the fact that the Al/NFs/CuO coating has considerable potential for use as an ignition material in microignitors. 41…”

In Situ Synthesized MEMS Compatible Energetic Arrays Based on Energetic Coordination Polymer and Nano-Al with Tunable Properties

“…A miniaturized integrated smart system that integrates EMs with the microelectromechanical system (MEMS) is attracting increased research attention from multiple disciplines . The potential applications include actuation in lab-on-a-chip devices, ignition in automotive airbags, propulsion and attitude control of micro-/nano-satellites, and miniaturized electro-explosive devices for various applications. − However, the application of EMs in MEMS devices has confronted two important obstacles at the moment. The first issue is related to the integration technique.…”

Core/shell CuO/Al nanorod thermite film based on electrochemical anodization

“…In comparison with bulk or micrometerscale counterparts, nanothermites exhibit such excellent performances such as an extremely high-energy density, a rapid energy release as well as a low onset temperature due to the short distances in heat and mass transfer during their energy release and ignition [5]. Hence, they are expected to be applied in the fields of nanoscale welding, gas generation, ignition and power generation for microsystems [6][7][8][9][10]. In particular, nanothermites are of such great interest for functional nanoenergetics-on-a-chip (NoC) systems that they can be easily integrated and compatible with MEMS technologies [11].…”