超声辅助微流控技术制备纳米LLM-105

Preparation of Nano-LLM-105 by Ultrasonic-assisted Microfluidic Technology

为改善2,6-二氨基-3,5-二硝基吡嗪-1-氧化物(LLM-105)的形貌以及减小粒径。基于溶剂-非溶剂法,通过超声辅助微流控技术制备纳米LLM-105。采用场发射扫描电镜(FE-SEM)观察样品的微观形貌,X射线衍射(XRD)分析样品的晶型。此外,通过流体可视化证明了超声波对于流体混合的促进作用。结果表明,通过超声所制备的样品颗粒更小,粒径更均匀,平均粒径为137.65 nm,并且形貌为类球型,且晶型较原料未发生改变。差示扫描量热分析(DSC)表明纳米LLM-105的热分解温度较原料降低。说明超声辅助的引入,不仅可以提高制备纳米LLM-105的效率,还会使其粒径显著减小。

Nano 2,6-diamino-3,5-dinitropyrazine-1-oxide(LLM-105)was prepared by ultrasound-assisted microfluidic technology based on the solvent and non-solvent method to improve the morphology and reduce the particle size.The microscopic morphology and crystal structures of the samples were characterized by field emission scanning electron microscopy(FE-SEM)and X-ray diffraction(XRD).In addition,The promotion of fluid mixing by ultrasonic method was demonstrated by fluid visualization.The results showed that the spherical particles prepared by ultrasound were smaller and homogeneous,with an average particle size of 137.65 nm.Meanwhile,the crystal structures remained unchanged from the raw material.Differential scanning calorimetry(DSC)showed that the thermal decomposition temperature of nano-LLM-105 was reduced compared to the raw material,demonstrating that ultrasonic assistance can not only improve the efficiency of preparing nano-LLM-105,but also significantly reduce the particle size.