以明胶阿拉伯树胶为壁材,四氯乙烯为分散介质,硬脂酸改性的TiO2为显示颗粒,采用复合凝聚法 制备了红白显示的电子墨水微胶囊.详细讨论了TiO2用量对反射性能的影响,讨论了Span80用量对分散体系稳定性的影响.结果表明:随着电荷控制剂Span80用量的增加,颗粒的Zeta电势和电泳淌度随之增加,使得分散体系的稳定性增加.当Span80浓度为3.0％时,分散体系长时间放置,无沉降发生.制备的微胶囊涂膜后,器件的对比度及分辨率均得到了良好改善.同时,驱动电压可达2.5 V/μm,响应时间降低到150ms.
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