锆/聚叠氮缩水甘油醚复合粒子的制备、表征及静电性能

锆粉具有密度大、体积热值高、点火和燃烧性能良好的优点，是提升推进剂密度比冲的重要燃料，但由于其静电火花感度高，使用中易燃烧，在推进剂中应用存在安全隐患。为提高锆粉的抗静电性能，研究采用一种推进剂常用的聚叠氮缩水甘油醚(GAP)含能粘合剂，对锆粉进行包覆改性，获得了Zr/GAP复合粒子。研究其形态、结构、热性能和抗静电火花性能。结果表明，包覆处理可显著降低锆粉粒子的静电火花感度，50%发火能从5.13 mJ提高至24.91 mJ，并且保留了锆粉的高密度特性及良好的燃烧性能。研究成果为促进锆粉在高密度推进剂中的应用提供了技术支持。

Preparation,Characterization and Electrostatic Properties of GAP-coated Zirconium Composite Particles

Zirconium metal prepared as powder is of interest as an energetic material due to its good combustion performance, and high density, which affords the opportunity to use zirconium powders as fuel in solid propellants. Unfortunately, the application of current zirconium powders is limited due to its high electrostatic discharge sensitivity, making the zirconium powders more pyrophoric and less amenable to functionalization. Glycidyl azide polymer (GAP), a kind of energetic binder as coating material, is selected to improve the security, and coated on the surface of zirconium powder directly to obtain Zr/GAP composite particles with reduced electrostatic discharge sensitivity. The measured results show that 50% firing energy (E₅₀) of Zr/GAP is increased from 5.13 mJ to 24.91 mJ, meanwhile the good combustion performance and high density of Zr powder are also reserved. This work provides technology support for its application in high density propellant.