微流控技术制备微米级DAP-4基含能复合微球及性能研究OA北大核心CSTPCD

To improve the safety of the charging process of molecular perovskite energetic material(DAP-4),spherical granula-tion of DAP-4-based energetic composite microspheres was realized by altering the composite ratio of the bonding agents,Glyc-idyl Azide Polymer(GAP)and nitrocellulose(NC)(constituting 2％of the mass of DAP-4)using the coaxial droplet microfluid-ic technology.The macro and micro morphology,crystal structure,thermal properties,combustion properties,and mechanical sensitivity of the samples were tested and analyzed by scanning electron microscope,X-ray diffractometer,differential thermal scanning calorimeter,thermogravimetric analyzer,high-speed photography,impact sensitivity tester and friction sensitivity tes-ter.The results indicate that DAP-4 has the best sphericity when the ratio of GAP to NC is 4:1.The crystal structure of DAP-4 is not changed after spheroidizing granulation,and the peak temperature of thermal decomposition is slightly advanced.The com-bustion time of DAP-4 microspheres is slightly longer than that of raw materials,overall with a very stable continuous combus-tion,retaining its excellent combustion performance.The GN41 microspheres can significantly improve fluidity while reducing mechanical sensitivity and improving the safety of the charging process.