HTPB/Ni/μAl复合粒子的制备及其热氧化性能  

Preparation and thermal oxidation properties of HTPB/Ni/μAl

作　　者：包淑霞 李廷润 郭春雨 赵洋洋 张慧娟 吴瑞凤[1] BAO Shuxia;LI Tingrun;GUO Chunyu;ZHAO Yangyang;ZHANG Huijuan;WU Ruifeng(School of Chemical Engineering,Inner Mongolia University of Technology,Hohhot 010050,China)

机构地区：[1]内蒙古工业大学化工学院,呼和浩特010050

出　　处：《固体火箭技术》2022年第5期721-728,共8页Journal of Solid Rocket Technology

摘　　要：镍包覆铝粉能够有效改善铝粉的燃烧性能。采用液相还原法制备了镍包覆微米铝(Ni/μAl)复合材料,并加入端羟基聚丁二烯(HTPB)进行二次包覆得到HTPB/Ni/μAl。利用傅里叶红外光谱(FT-IR)、X-射线粉末衍射(XRD)、X-射线光电子能谱分析(XPS)、扫描电镜(SEM)、透射电镜(TEM)和电子能谱(EDS)分析了样品的结构、形貌和组成,通过差示扫描量热仪(DSC)和热重分析仪(TG)研究了样品的热氧化性能。结果表明,还原出来的过渡金属Ni沉积在μAl球周围,而HTPB则均匀地包覆在Ni/μAl复合粒子表面。热性能研究表明,Ni的引入可以促进微米铝的氧化放热过程,特别是高温氧化过程。而HTPB包覆可以提高复合材料中活性铝含量,使HTPB/Ni/μAl中μAl的氧化放热焓(14625 J/g)相比纯μAl(10948 J/g)和Ni/μAl(11118 J/g)均有提高,分别提高了3677 J/g和3507 J/g。The combustion property of aluminum powders coated by nickel can be effectively improved.The composites Ni/μAl(Ni-coated micron Al powders)were prepared by means of the liquid phase reduction method,and then Ni/μAl were secondly coa-ted by adding HTPB to obtain HTPB/Ni/μAl composites.The composition of HTPB/Ni/μAl and Ni/μAl were analyzed by FT-IR,XRD,XPS,SEM,TEM and EDS.In addition,the thermal oxidation properties of the two samples were characterized by DSC and TG.The results show that the reduced transition metal Ni is deposited around theμAl sphere,while HTPB is uniformly coated on the surface of Ni/μAl composite particles.Thermal property studies show that the introduction of Ni can promote the exothermic oxida-tion process ofμAl,especially high temperature oxidation process.HTPB as the coating agent can increase the content of activated a-luminum in the composites,so that the oxidation enthalpy ofμAl in HTPB/Ni/μAl(14625 J/g)is higher than that in pureμAl(10948 J/g)and Ni/μAl(11118 J/g),which are increased by 3677 J/g and 3507 J/g,respectively.

关 键 词：微米铝粉 镍包覆 复合含能材料 二次包覆 液相还原 

分 类 号：V512[航空宇航科学与技术—航空宇航推进理论与工程]