纳米Al/PS微胶囊中铝粉含量及活性分析

Content and Activity Analysis of Aluminum Powder in Nano-aluminum/PS Microcapsules

采用优化的工艺条件,制备了不同铝粉含量的纳米铝粉/聚苯乙烯(Al/PS)微胶囊,随着铝粉添加量的增加,铝粉的包覆率逐渐降低。纳米Al/PS微胶囊呈球形,表面光滑无明显缺陷,粒子与粒子之间分散性很好。对纳米铝粉复合前后的活性变化进行了实验分析,结果表明,不同纳米铝粉含量的纳米Al/PS微胶囊中的活性铝含量基本相同,未经贮存、自然条件下密闭贮存30 d及氧气罐中贮存30 d后,活性铝含量分别为76.07%,76.06%和74.81%,纳米铝粉被PS包覆后可长期保持活性。

Nano-aluminum/polystyrene （PS） microcapsules with different aluminum content were prepared under optimization conditions. With increasing amount of nano-aluminum particles, the encapsulation ratio of microcapsules decreased. The nano-aluminum/PS microcapsules had good sphericity,smooth surface and high dispersibility. The activities of nano-aluminum powders were analyzed before and after encapsulation. The nano-aluminum/PS microcapsules with different aluminum content had almost equal activity. The active aluminum content of nano-aluminum/PS microcapsules was 76.07%. Stored in a sealed bag in natural condition and in an oxygen bottle after 30 d,the active aluminum content of nano-aluminum/PS microcapsules were 76.06% and 74.81%, respectively. The results show that the active aluminum content can keep for long time after aluminum was encapsulaed by PS.