摘要
硼(B)基复合含能材料的能量密度较大,广泛应用于火炸药领域。研究通过乳液和溶剂蒸发法用不同聚偏二氟乙烯(PVDF)质量含量(5%、10%、15%和20%)制备了B/高氯酸铵(AP)/PVDF复合含能微球,并采用扫描电子显微镜对其表面微观形貌进行表征,利用超声悬浮激光点火系统研究了不同PVDF含量的复合含能微球悬浮燃烧特性,通过对B/AP/PVDF复合含能微球微爆燃烧特性的在线诊断,筛选出燃烧特性最优的PVDF含量的微球。结果表明,所得微球表面近似球形,其悬浮燃烧可分为发展燃烧、稳定燃烧和衰减燃烧3个阶段,过程中都伴有“微爆”现象,PVDF含量为10%时具有最大的火焰面积和亮度,最强的BO2发射光谱(11291.8 counts),最大的BO2峰值面积积分(128516.8)和最高的表面燃烧温度(1243.8℃),这些结果表明微球的PVDF含量为10%时具有最优的燃烧特性和能量释放特性。
Boron(B)-based composite energetic materials,renowned for their high energy density,are employed in explosives and propellant formulations.In this study,B/ammonium perchlorate(AP)/polyvinylidene fluoride(PVDF)composite energetic microspheres were synthesized using an emulsion-solvent evaporation method,with different PVDF mass fractions(5%,10%,15%,and 20%).The surface morphology of the prepared microspheres was characterized via scanning electron microscopy(SEM).To evaluate their combustion behavior,a suspension combustion test was performed using an ultrasonic levitation laser ignition system.Through real-time diagnostics of micro-explosive combustion phenomena,the optimal PVDF content for the en-hanced combustion performance was determined.The results revealed that the prepared microspheres possessed a near-spherical morphology and exhibited a three-stage combustion process(developing combustion stage,stable combustion stage and de-creasing combustion stage),which was also accompanied by micro-explosions.Among the formulations,the microspheres with 10%PVDF demonstrated the most favorable combustion characteristics,exhibiting the largest flame area and brightness,the highest BO₂emission intensity(11291.8 counts),the greatest BO_(2)peak area integration(12856.8),and the highest surface combustion temperature(1243.8℃).These results indicate that the B/AP/PVDF microspheres exhibit optimal combustion char-acteristics and energy release performance at a PVDF content of 10%.
作者
强月
梁导伦
王军
王珊
王建
许王子
林日琛
沈德魁
JIANG Yue;LIANG Dao-un;WANG Jun;WANG Shan;WANG Jian;XU Wang-zi;LIN Ri-chen;SHEN De-kui(Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education,School of Energy and Environment,Southeast University,Nanjing 211102,China;School of Mechanical and Electrical Engineering,Beijing Institute of Technology,Beijing 100081,China;Institute of Chemical Materials,China Academy of Engineering Physics,Mianyang 621999,China)
出处
《含能材料》
北大核心
2025年第6期601-609,共9页
Chinese Journal of Energetic Materials
基金
国家自然科学基金(52276104和51906040)
中央高校基本科研业务费专项资金(2242025RCB0003)
东南大学至善青年学者计划。
关键词
硼
聚偏二氟乙烯
高氯酸铵
复合含能微球
超声悬浮燃烧
boron
polyvinylidene fluoride
ammonium perchlorate
composite energetic microspheres
ultrasonic suspension combustion
