摘要
为了降低AP的机械感度,采用机械复合法,用纳米TATB(粒径200nm)对平均粒径分别为155μm和10μm的AP进行包覆,制备了TATB/AP壳-核型复合粒子;采用SEM对复合粒子的形貌进行表征,并对其吸湿性、摩擦感度和撞击感度进行测试,探究了TATB用量、AP颗粒平均粒径、干燥方式(50℃烘箱烘干、自然风干、真空抽滤)等对TATB/AP复合粒子机械感度的影响。结果表明,其他条件相同时,对于粒径155μm的AP,TATB用量越高则复合粒子感度越低;TATB质量分数15%时,其对AP的包覆效果最好,可使AP颗粒的吸湿性降低80%,摩擦感度从100%降至0,撞击感度H50值从31.1cm增至43.4cm;纳米TATB对平均粒径10μm的AP降感效果则不明显,甚至感度有所提高。3种干燥方法中真空抽滤干燥法得到的TATB/AP复合粒子撞击感度和摩擦感度分别为35.8cm和0,感度最低;50℃烘干得到的样品撞击感度和摩擦感度分别为31.3cm和8%,感度最高。
To decrease the mechnical sensitivity of AP, the TATB/AP shell-core composite particles were successfully prepared by mechanical compounding method using nano-TATB(particle size of 200nm) to coat AP with average particle size of 155 μm and 10 μm . The morphology of the prepared composite particles was characterized by SEM,and the hygroscopicity, impact and friction sensitivities were also tested. The effects of TATB dosage, average particle size of AP , drying mode(drying at 50℃, naturally air dry, vacuum filtration) on the sensitivity of TATB/AP composite particles were investigated. The results show that for 155 μm AP, the higher the TATB dosage is, the lower the sensitivity of the composite particles is with other conditions unchanged. Nano-TATB has an optimum coating effect on the 155 μm AP when its mass fraction is 15%, which decreases the friction sensitivity from 100% to 0, raises H 50 from 31.1cm to 43.4cm, and reduces the hygroscopicity by 80%. Nano-TATB has no obvious effect on the desensitization of AP with an average particle size of 10 μm , on the contrary, even makes the sensitivities increase. In addition, among the three drying methods, TATB/AP composite particles dried by vacuum filtration have the lowest impact and friction sensitivities of 35.8cm and 0, while drying at 50℃ leads to the highest impact and friction sensitivities of 31.3cm and 8%, respectively.
作者
张哲
雷红兵
郝嘎子
李强
赵刘明
黎博
李东楠
姜炜
ZHANG Zhe;LEI Hong-bing;HAO Ga-zi;LI Qiang;ZHAO Liu-ming;LI Bo;LI Dong-nan;JIANG Wei(National Special Superfine Powder Engineering Research Center of China, School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China;Shanxi North Xing′an Chemical Industry Co. Ltd., Taiyuan 030008, China)
出处
《火炸药学报》
EI
CAS
CSCD
北大核心
2019年第3期284-288,I0005,共6页
Chinese Journal of Explosives & Propellants
基金
国家自然科学基金(No.21805139)
中国北方化学工业集团有限公司青年科技创新专项项目(No.QKCZ201713)
中央高校基本科研业务费专项资金资助(No.30918011312
No.30919011404)
基础产品创新科研火炸药专项项目
关键词
材料科学
TATB
高氯酸铵(AP)
包覆
降感
机械复合法
material science
TATB
ammonium perchlorate(AP)
coating
desensitization
mechanical compounding method
