高活性纳米铝粉HTPB-TDI包覆组装与表征  

Cladding Assembly and Characterization of HTPB-TDI Coated High Activity Nano-Aluminum Powder

作　　者：郝洁[1] 丁昂[1,2] 黄敬晖 张延松[1] 钱坤明[1] 纪松[1] 

机构地区：[1]中国兵器科学研究院宁波分院,浙江宁波315104 [2]大连理工大学,辽宁大连116085

出　　处：《稀有金属》2018年第2期168-174,共7页Chinese Journal of Rare Metals

基　　金：总装重点预研基金项目(70401020201,7040101020202);国家自然科学基金项目(51301154);宁波市自然科学基金项目(2013A610082)资助

摘　　要：采用复合型喷雾造粒工艺对制备态高活性纳米铝粉进行了HTPB-TDI包覆造粒研究,用扫描电子显微镜（SEM）、能谱仪（EDS）、透射电子显微镜（TEM）等对包覆造粒结果进行了表征。结果表明,在包覆剂与活性纳米铝粉质量比为1∶2和1∶5的两种情况下都能实现对高活性纳米铝粉的包覆组装造粒,包覆剂能够高覆盖纳米铝粉表面,且均匀铺展在纳米铝粉表面,厚度分别达到10和5 nm,能很好阻隔或延缓外界氧与纳米铝粉的反应,有望实现高活性纳米铝粉的长期存储。随着包覆剂含量的减少,在相同的组装工艺条件下,组装造粒颗粒品质随之提高,组装颗粒平均粒径减小,但颗粒球型度随之提高。在1∶5的配比下,包覆组装颗粒的活性铝含量超过72%,活性铝含量高,因此,可通过配比和工艺控制进一步提高包覆组装颗粒活性铝含量,实现高活性纳米铝粉在推进剂中的应用。The hybrid-type spray granulation process was used to coat and granulate the high active nano-aluminum powder with tiT- PB-TDI coating agent. Tile coated granules were characterized with scanning electron microscope （SEM） , energy disperse spectromeler （EDS） , transmission electron microscope （TEM） and so on. The results showed that the high active nano-aluminum could he coated and granulated when the mass ratio of coating agents to nano-aluminum was 1 ： 2 and 1 ： 5. The HTPB-TDI coating agent could completely cover and uniformly spread on the surface of nano-aluminum in the above two case, and the thickness of HTPB-TDI coating agent re- spectively reached 10 and 5 nm, which could well block the external oxygen entering and reacting with active aluminum powder, and realized the long-term storage of high active nano-aluminum powder. With the reduction of the content of the coating agent, under the same coating and granulating conditions, the quality of assembly particles and the average particle diameter of the assembly decreased, and the degree of spherical particles increased significantly. For the ratio of 1 ： 5, active aluminum content of the coating and granula- ting particles exceeded 72% with low losses of activity. Therefore, the active aluminum content could be turther improved by controlling the ratio of coating agent and nano-aluminum or the process of spray granulation, and made it more possible to he used in nano-alu- minum in future high-performance propellant.

关 键 词：高活性 纳米铝粉 HTPB-TDI 包覆组装 喷雾造粒 

分 类 号：TB333[一般工业技术—材料科学与工程]