Microfluidic Synthesis of Size-Controlled and Morphologically Homogeneous Lead Trinitroresorcinate Produced by Segmented Flow
Size-controlled and morphologically homogeneous lead trinitroresorcinate (LTNR) particles were synthesized in aqueous solutions using segmented flow. The experimental setup consisted of syringe pumps connected with silicone tubing to a segmented flow microfluidic platform made of polymethyl methacrylate (PMMA) containing silicone-based microchannels immersed in a thermostatted bath. As a starting point for the optimization of the experimental conditions, LTNR particles were first synthesized through conventional batch synthesis. The optimized batch conditions were adapted to segmented flow arrangements. Characterization studies on LTNR formed through batch and segmented flow methods were carried out, and it was found that in the latter LTNR particles exhibited superior particle morphology and narrower particle size distribution. In addition, the heat release of LTNR prepared by segmented flow increased by 353.52 J g −1 in comparison to that formed through batch synthesis. Finally, it was found demonstrated that segmented flow methods result in a 13 % increase in yield for the synthesis of LTNR. This study demonstrated the feasibility of synthesising primary explosives using a segmented flow microfluidic platform.
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