Suppression of MgAl-LDHs on high-energy fuel explosion containing aluminum under different suppressant release times

Explosion accidents involving high-energy fuel present substantial hazards, underscoring the urgent need for effective safety protection methods. This study employed a hydrothermal method to synthesize nanoscale MgAl-LDHs and innovatively investigated their potential for explosion suppression in the high-energy system composed of RDX/Al. The performance of explosion suppression was evaluated using two novel testing methods capable of controlling the delay time for suppressant release. Experimental results indicate that MgAl-LDHs significantly surpass traditional suppressants, such as NH₄H₂PO₄ and NaHCO₃, in their ability to reduce explosion overpressure and mitigate flames. Furthermore, it was found that reduce the suppressant release delay time is more critical than merely increasing the quantity of the suppressant used. By combining SEM, XPS, GC, and other characterization techniques with quantum chemical theoretical calculations, this study innovatively reveals the explosion suppression mechanism of MgAl-LDHs, elucidating the early decomposition mechanism of RDX and the suppression process of OH in MgAl-LDHs laminates. This research serves as a brand-new example of the application of LDHs materials in explosion suppression, providing novel ideas for future applications in the field.