Wang Yao, Zhang Zhi, Chen Qun, Ye Caihong, Zhang Jiahao, Gao Qingguo, Liu Liming, Yang Jianjun, Pan Xinjian, Miao Yu, Chi Feng, Jin Mingliang
School of Electronics and Information, University of Electronic Science and Technology of China, Zhongshan Institute, Zhongshan 528402, China.
South China Academy of Advanced Optoelectronics, South China Normal University, Guangzhou 510006, China.
Micromachines (Basel). 2022 May 31;13(6):880. doi: 10.3390/mi13060880.
Electrophoretic display (EPD) is a popular display technology in recent years. The core of the EPD is electrophoretic particles, and its Zeta potential has an important impact on EPDs. In this work, a method using pyrrolidine mono ionic liquid was proposed to improve the Zeta potential of electrophoretic particles: Copper (II) phthalocyanine pigment was modified with mono ionic liquid 1-Butyl-1-methylpyrrolidinium bromide. The characterization results show that the mono ionic liquid had been successfully coated on pigment particles. At the same time, the dispersion and stability of particles were improved. The modified Copper (II) phthalocyanine pigment could be stably dispersed in tetrachloroethylene for more than 20 days. The Zeta potential increased from 32.42 mV to 49.91 mV, increasing by 53.95%. Finally, the prepared blue electrophoretic particles were compounded with white titanium dioxide to prepare blue and white dual-color electrophoretic dispersion, and then an EPD cell was designed to test its performance. The results show that the prepared electrophoretic dispersion can realize reversible reciprocating motion. Therefore, because of the unique structure and properties of pyrrolidine mono ionic liquids, the blue nanoparticles prepared with pyrrolidine ionic liquids as charge control agents in this study can be used as excellent candidate materials for EPD.
电泳显示（EPD）是近年来一种流行的显示技术。EPD的核心是电泳粒子，其zeta电位对EPD有重要影响。在这项工作中，提出了一种使用吡咯烷单离子液体来提高电泳粒子zeta电位的方法：用单离子液体1-丁基-1-甲基溴化吡咯烷对铜（II）酞菁颜料进行改性。表征结果表明，单离子液体已成功包覆在颜料颗粒上。同时，粒子的分散性和稳定性得到了提高。改性后的铜（II）酞菁颜料能在四氯乙烯中稳定分散20多天。zeta电位从32.42 mV增加到49.91 mV，增幅为53.95%。最后，将制备的蓝色电泳粒子与白色二氧化钛复合，制备出蓝白双色电泳分散体，然后设计了一个EPD单元来测试其性能。结果表明，制备的电泳分散体能够实现可逆的往复运动。因此，由于吡咯烷单离子液体独特的结构和性质，本研究中用吡咯烷离子液体作为电荷控制剂制备的蓝色纳米粒子可作为EPD的优良候选材料。
