PVDF‐based energetic films with high output performance: Synergistic effect based on Al/Ti

Abstract With the ongoing advancement of miniaturization and microfabrication, Micro‐Electro‐Mechanical Systems (MEMS) energetic devices are increasingly demanding higher output capabilities from energetic materials. This study investigates the incorporation of Titanium (Ti) into PVDF‐based energetic films to improve their performance. We fabricated five Al/Ti/CuO/PVDF energetic composite films with varying Ti contents by direct ink writing (DIW). The results indicate that the Al/Ti/CuO/PVDF films demonstrate superior performance compared to Al/CuO/PVDF(AT‐0). Notably, the 50 wt% Al/50 wt% Ti/CuO/PVDF (AT‐50) film achieved optimal performance, exhibiting a 68% increase in combustion rate compared to the AT‐0 film. Additionally, it showed a reduction in ignition delay time by 6 ms, an increase in flame temperature of 160.9 K, a 24% rise in maximum pressure, a pressurization rate enhancement of 117%, and an overall increase in heat release of 26.8%. This is attributed to the synergistic effect of the Al/Ti bimetallic fuels, where their close contact creates an alloying reaction that releases a large amount of heat and avoids the detrimental effects of Al sintering. This Al/Ti/CuO/PVDF energetic composite film, characterized by its exceptional synergistic mechanism and high energy output, holds significant promise for integration with MEMS devices, paving the way for innovative applications in micro‐ignition, micro‐propulsion, and micro‐startup technologies. Highlights Ti was added to the PVDF‐based energetic films to form the dual‐fuel system. The Al/Ti dual‐fuel has a synergistic effect to improve output performance. The 50wt%Al/50wt%Ti/CuO/PVDF film can achieve optimal output performance.