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为防止纳米铝粉在空气中进一步氧化失活,在氮气气氛下,利用硅烷偶联剂对纳米铝粉预处理,后用聚叠氮缩水甘油醚(GAP)对其进行表面包覆改性,得到纳米Al/GAP复合粒子(n-Al/GAP)。采用扫描电镜(SEM)、透射电镜(TEM)、能谱分析仪(EDS)、X射线衍射仪(XRD)、傅里叶变换红外(FTIR)光谱及X射线光电子能谱(XPS)对其形貌和结构进行了表征。用差示扫描量热仪(DSC)对ADN(二硝酰胺铵)、n-Al/ADN和(n-Al/GAP)/ADN的热分解反应特性进行了研究。结果表明:偶联剂在GAP与纳米铝粉之间起到了桥梁的作用,GAP包覆纳米铝粉形成核壳结构复合粒子;nAl和n-Al/GAP对ADN液化温度几乎没有影响,但使其分解温度均明显提高,且n-Al/GAP影响更为显著。
In order to prevent the nano-aluminum powder from being further oxidized and deactivated in the air, the nano-aluminum powder was pretreated with a silane coupling agent under a nitrogen atmosphere and then surface-coated and modified with a polyglycidyl azide (GAP) The nano Al / GAP composite particles (n-Al / GAP) were obtained. The morphology of the samples was characterized by SEM, TEM, EDS, XRD, FTIR and XPS. Appearance and structure were characterized. The thermal decomposition reaction characteristics of ADN (ammonium dinitramide), n-Al / ADN and (n-Al / GAP) / ADN were investigated by differential scanning calorimetry (DSC) The results show that the coupling agent plays a bridge role between GAP and aluminum nanopowder, GAP coated aluminum nanopowder to form core-shell composite particles; nAl and n-Al / GAP have almost no effect on ADN liquefaction temperature, The decomposition temperature was significantly increased, and n-Al / GAP more significant impact.