以聚脲甲醛为囊壁、双酚A型环氧树脂(E-51)和正丁基缩水甘油醚(501#)混合物为囊芯,采用原位聚合法合成聚脲甲醛包覆环氧树脂体系微胶囊.通过L16(45)正交试验研究了原料配比、终点pH值、搅拌速率、酸化时间、平均升温速率等工艺参数对微胶囊的合成状态、粒径大小和分布的影响规律,并利用扫描电子显微镜(SEM)、光学-摄影显微镜(OM)进行表征.结果表明:原料配比和终点pH值对微胶囊的合成状态有显著影响;适当延长酸化时间和增加升温速率,有利于增加微胶囊表面的粗糙度;随着搅拌速率的增加,微胶囊的粒径减小、分布变窄.优化的工艺条件为:原料配比为0.8:1,终点pH=2.0～4.0,酸化时间为2.0～3.0 h,升温速率为0.17～0.25℃·min-1,搅拌速率为325～350 r·min-1.
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