聚合物包覆铝锂合金及其稳定性研究  

Study on Polymer Coated Aluminum-lithium Alloy and Stability

作　　者：唐长盛 杜芳[2] 李佳贺 杨玉林 夏德斌 张健 王平 林凯峰 陶博文[2] TANG Chang-sheng;DU Fang;LI Jia-he;YANG Yu-lin;XIA De-bin;ZHANG Jian;WANG Ping;LIN Kai-feng;TAO Bo-wen(School of Chemistry and Chemical Engineering,Harbin Institute of Technology,Harbin 150001,China;Hubei Institute of Aerospace Chemotechnology,Xiangyang Hubei 441003,China)

机构地区：[1]哈尔滨工业大学化工与化学学院,黑龙江哈尔滨150001 [2]湖北航天化学技术研究所,湖北襄阳441003

出　　处：《火炸药学报》2025年第3期201-208,I0003,共9页Chinese Journal of Explosives & Propellants

基　　金：国家自然科学基金(No.22175059)。

摘　　要：为提高铝锂合金(Al-Li)的稳定性,分别使用自制多羟基聚酯(PL)和聚多巴胺对其进行表面包覆处理,制得Al-Li@PL和Al-Li@PDA;利用扫描电子显微镜、X射线衍射、X射线光电子能谱仪对其形貌结构进行表征,并对界面作用机理进行了探讨。通过干燥器平衡法考察了Al-Li@PL和Al-Li@PDA的湿热稳定性;使用氧弹量热法和热重-差式扫描量热法对样品进行了热分析测试,并采用非等温热分解动力学法评价了样品与1,2,4-丁三醇硝酸酯(BTTN)的相容性。结果表明,良好的粘附效果与官能团(羟基、羧基、氨基)是形成稳定包覆层的关键因素,Al-Li、Al-Li@PL和Al-Li@PDA的燃烧热值分别为30957、30852和30589J/g,包覆后热值损耗率低于1%,氧化放热模式基本未发生改变,最高氧化放热峰分别后移13℃与2℃;Al-Li@PL和Al-Li@PDA均不与80℃水发生剧烈反应,75%湿度下30天吸湿增重率由177.42%分别降至5.32%和2.58%,与BTTN的相容性从5级提升至1级。To improve the stability of aluminum-lithium alloy(Al-Li),the surface coating treatment was performed with self-made polyhydroxypolyester and polydopamine,respectively,to obtain Al-Li@PL and [e-mail] morphology and structure were characterized by scanning electron microscopy(SEM),X-ray diffraction(XRD)and X-ray photoelectron spectroscopy(XPS),and the interfacial mechanism was discussed.The moisture and heat stability of Al-Li@PL and Al-Li@PDA were investigated by dryer balance method.The thermal decomposition of samples were analyzed by oxygen bomb calorimetry and thermogravimetric differential scanning calorimetry,and the compatibility of the sample with 1,2,4-butantriol nitrate(BTTN)was evaluated by non-isothermal thermal decomposition kinetics.The results show that good adhesion and functional groups(hydroxyl,carboxyl and amino)are the key factors to form stable coating layers.The heat of combustion values of Al-Li,Al-Li@PL and Al-Li@PDA are 30957,30852 and 30589J/g,respectively,and the loss rate value after coating is less than 1%.The oxidation heat release mode does not change,and the maximum oxidation heat release peak temperature move back by 13℃and 2℃,respectively.Both Al-Li@PL and Al-Li@PDA do not react strongly with water at 80℃,their hygroscopic weight gain rates decrease from 177.42%to 5.32%and 2.58%at 75%humidity for 30 days,respectively,their compatibility with BTTN increase from level 5 to level 1.

关 键 词：物理化学 铝锂合金 稳定性 相容性 包覆 界面作用 

分 类 号：TJ55[兵器科学与技术—军事化学与烟火技术] O642[理学—物理化学]