微流控制备微纳米LLM-105/CL-20复合含能材料  

Preparation of Micro/Nano LLM-105/CL-20 Composite Energetic Materials by Microfluidic Technology

作　　者：李营 刘美祺 刘子君 詹乐武 侯静 李斌栋[1] LI Ying;LIU Mei-qi;LIU Zi-jun;ZHAN Le-wu;HOU Jing;LI Bin-dong(School of Chemistry and Chemical Engineering,Nanjing University of Science and Technology,Nanjing 210094,China)

机构地区：[1]南京理工大学化学与化工学院,江苏南京210094

出　　处：《火炸药学报》2024年第6期521-527,I0003,共8页Chinese Journal of Explosives & Propellants

摘　　要：为了增加含能材料在生产、使用中的安全性能,利用微流控技术,以改良型氟橡胶作为黏结剂,采用LLM-105和CL-20为原料,成功实现了高能钝感LLM-105/CL-20复合材料的连续且安全的制备;采用场发射扫描电镜(SEM)观察了样品的微观形貌,采用傅里叶红外光谱(FT-IR)和X射线衍射(XRD)分析了样品的结构和晶型;采用DSC分析了样品的热分解性能;测试了原料CL-20及复合粒子的机械感度。结果表明,在优化条件下,即溶剂与非溶剂流速比为1∶6,黏结剂质量分数为6%,总流速为80mL/min时,LLM-105能够有效地包覆在CL-20表面,粒径分布范围为0.19~3.92μm;通过FT-IR和XRD表征,进一步证明LLM-105成功包覆在CL-20表面;复合粒子的撞击感度从10cm提升至55cm(落锤质量为2kg),显著增强了其安全性能。表明微通道内制备LLM-105/CL-20复合粒子的方法具有降感效果显著的优点,且该方法易于操作,适合连续安全生产。To enhance the safety performance of energetic materials during production and utilization,microfluidics technology was employed to successfully and continuously fabricate high-energy impact-insensitive LLM-105/CL-20 composite materials using modified fluororubber as a binder.The microstructural morphology of the samples was observed using field emission scanning electron microscopy(SEM),while the structure and crystalline phase were analyzed through Fourier-transform infrared spectroscopy(FT-IR)and X-ray diffraction(XRD).The thermal decomposition behavior of the samples was assessed via differential scanning calorimetry(DSC),and the mechanical sensitivity of raw material CL-20 and composite particles was tested.The results show that under optimal conditions-where the solvent-to-nonsolvent flow rate ratio was set at 1∶6,the binder mass fraction was 6%,and the total flow rate was 80 mL/min-LLM-105 was effectively coated on the surface of CL-20,with particle size distribution ranging from 0.19 to 3.92μm.Characterization by FT-IR and XRD further confirmed the successful coating of LLM-105 on the surface of CL-20.The impact sensitivity of composite particles was increased from 10 cm to 55 cm(drop mass of 2 kg),significantly enhancing their safety performance.The methodology of preparing LLM-105/CL-20 composite particles within microchannels demonstrated advantages in reducing sensitivity,showing that this method is easy to operate and suitable for continuous safe production.

关 键 词：物理化学 微流控 LLM-105/CL-20复合粒子 安全性能 

分 类 号：TJ55[兵器科学与技术—军事化学与烟火技术] O64[理学—物理化学]