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
李营 1刘美祺 1刘子君 1詹乐武 1侯静 1李斌栋1
作者信息
- 1. 南京理工大学化学与化工学院,江苏南京 210094
- 折叠
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.
Abstract
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 u-sing modified fluororubber as a binder.The microstructural morphology of the samples was observed using field emission scan-ning 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 differ-ential 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 80mL/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 10cm to 55cm(drop mass of 2kg),significantly enhancing their safety performance.The methodology of preparing LLM-105/CL-20 compos-ite 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Key words
physical chemistry/microfluidic/LLM-105/CL-20 composite/safety performance引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据