超临界流体快速膨胀法粒子包覆中喷嘴结构对包覆效果的影响  

The influences of the structure of nozzle on coating effect in particle coating by Fluid-Rapid Expansion of Supercritical Solutions

作　　者：张发兴[1] 卫晓利[2] 

机构地区：[1]四川理工学院材料与化学工程学院 [2]中北大学理学院

出　　处：《中国粉体工业》2009年第1期7-11,共5页China Powder Industry

摘　　要：采用超临界流体快速膨胀法,利用自制特殊喷嘴制备红磷微胶囊阻燃剂。实验研究了旋流器、前置可旋接头旋转角度对包覆效果的影响。结果表明,加旋流器时的包覆效果明显优于不加旋流器时的包覆效果。在前置可旋接头旋角为20°时,包覆效果最好,当旋角大于30°后,包覆效果随旋角的增大而逐渐变差。Red phosphorus microencapsulation flame retardant was prepared by Supercritical Fluid-Rapid Expansion of Supercritical Solutions(SCF-RESS),using a self-made special nozzle. The influences of the reversed gyrator, and the rotation angle of the front revolvable tie-in on coating effect were discussed. The results showed that the coating effect which the reversed gyrator was installed on the nozzle was better than it which the reversed gyrator was not installed on the nozzle.The coating effect is the best when...

关 键 词：超临界流体 喷嘴 包覆 微胶囊 

分 类 号：TQ314.248[化学工程—高聚物工业]