摘要
二硝酰胺铵(ADN)作为一种高能绿色氧化剂,可显著提高推进剂的能量并降低特征信号。但ADN表面极性高,吸湿性强的特点影响了其在固体推进剂中应用。采用超声诱导使其球形化,并利用包覆剂对ADN进行原位包覆,制备了ADN球形化-包覆一体化材料。通过SEM-EDS、XRD、DSC-TG、红外光谱、撞击感度、摩擦感度、干燥器平衡法、无浆混合机等对一体化材料的性能进行了研究。结果表明:球形化-包覆后ADN球形度小于1.5,并且仍保持了原始ADN的晶型特征;包覆后ADN热分解峰温较原料ADN提高11℃,热失重温度起始温度延后15℃,撞击感度提高3.6 J;在30℃,相对湿度为75%条件下,饱和吸湿率由55%下降至2.5%以下,相对湿度59%时,饱和吸湿率进一步降低为1.2%;含球形化-包覆ADN的HTPB推进剂药块与含未处理ADN的HTPB推进剂药块相比,气孔明显减少。
Ammonium dinitramide(ADN),as a high-energy green oxidizer,can significantly increase the energy of the propellant and reduce the characteristic signal.which is expected to be applied in solid rocket propellants.ADN has seriously affected its application in solid propellants,due to its high surface polarity and strong hygroscopicity.The manufacturing of spherical coating ADN particles was prepared by using ultrasonic and in-situ coating technology.The characteristics of coated ADN-prills were investigated by SEM-EDS,XRD,DSC-TG,infrared spectroscopy,impact sensitivity,friction sensitivity,dryer balance method,and pulpless mixer.Results show that the sphericity of the coated ADN-prills is less than 1.5,and the crystal form remains unchanged.The peak temperature of thermal decomposition is increased by 11℃,the onset temperature of thermal weight loss temperature is delayed by 15℃,and the impact sensitivity is increased by 3.6 J.Under the condition of 30℃ and relative humidity of 75%,the saturated hygroscopicity of coated ADN-prills decrease from 55% to less than 2.5%.Under the condition of 59%,the saturated hygroscopicity of coated ADN-prills is further reduced to 1.2%.Compared with the HTPB propellant containing raw ADN,the propellant containing coated ADN-prills,the porosity of the propellant block is significantly reduced.
作者
李磊
陈红
赖羽
黄丹椿
汪慧思
杜芳
顾健
陶博文
LI Lei;CHEN Hong;LAI Yu;HUANG Danchun;WANG Huisi;DU Fang;GU Jian;TAO Bowen(Science and Technology on Aerospace Chemical Power Laboratory,Xiangyang 441003,China;Shanghai Institute of Mechanical and Electrical Engineering,Shanghai 4201209,China)
出处
《固体火箭技术》
EI
CAS
CSCD
北大核心
2020年第6期748-755,共8页
Journal of Solid Rocket Technology
基金
国家自然科学基金面上项目(21875061,21975066)。
关键词
二硝酰胺铵
球形化工艺
表面包覆
吸湿性
感度
ADN
prilling process
surface coating
saturated hygroscopicity
sensitivity
