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含能材料  2013 

Al/HTPB含能复合粒子的制备及表征

DOI: 10.3969/j.issn.1006-9941.2013.06.011

Keywords: 材料学,超细铝粉,包覆,复合粒子,端羟基聚丁二烯,固体推进剂

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Abstract:

为保护铝粉在固体火箭推进剂中的活性,增加超细铝粉与固体推进剂其它组分的相容性,以端羟基聚丁二烯(HTPB)为包覆剂,异佛尔酮二异氰酸酯(IPDI)为固化剂,包覆了表面活化、粒径为2μm左右的超细铝粉,制备了Al/HTPB含能复合粒子。研究了氨基硅烷偶联剂KH-550改性铝粉及包覆剂用量对包覆铝粉形貌和粒径的影响。用扫描电镜(SEM)、透射电镜(TEM)、X射线衍射仪(XRD)、红外光谱(FTIR)、激光粒度仪、热重-差热分析(TG-DTA)表征了Al/HTPB复合粒子。结果表明:超细铝粉经KH-550改性且包覆剂用量为1.5%时,Al/HTPB含能复合粒子的包覆膜更均匀,低于400℃时,HTPB包覆层能防止铝粉的氧化,在400~525℃范围内HTPB能迅速燃烧,迅速释放出包覆的活性铝。

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