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化工学报  2013 

双重乳液固化速率对PAMS微球球形度的影响

DOI: 10.3969/j.issn.0438-1157.2013.07.019, PP. 2446-2452

Keywords: 微封装,双重乳液,PAMS,固化

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Abstract:

为实现对制备聚-α-甲基苯乙烯(PAMS)空心微球的乳液微封装过程中双重乳液固化速率的调控,实验测量了不同固化工艺条件下双重乳液中油相有机溶剂氟苯向外水相的扩散速率,研究了双重乳液固化速率对最终PAMS微球球形度的影响。结果表明,改变外水相中的氟苯浓度可以控制油相溶剂氟苯向外水相扩散的速率,从而改变双重乳液的固化速率。在双重乳液固化过程的关键阶段,通过降低氟苯扩散速率来延缓双重乳液的固化速率是提高最终PAMS微球球形度的有效途径。通过优化双重乳液的固化速率,单批次PAMS微球中球形偏离度值低于1μm的微球比例从1.9%提高到30.4%。

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