窦盈莹, 邓勇, 蒋洪伟, 唐彪, 水玲玲, 李发宏, Jan GROENEWOLD, Alex HENZEN, 周国富. 咪唑类离子液体的亲疏水性对电润湿器件性能的影响[J]. 华南师范大学学报(自然科学版), 2018, 50(3): 29-35. doi: 10.6054/j.jscnun.2018062
引用本文: 窦盈莹, 邓勇, 蒋洪伟, 唐彪, 水玲玲, 李发宏, Jan GROENEWOLD, Alex HENZEN, 周国富. 咪唑类离子液体的亲疏水性对电润湿器件性能的影响[J]. 华南师范大学学报(自然科学版), 2018, 50(3): 29-35. doi: 10.6054/j.jscnun.2018062
DOU Y Y, DENG Y, JIANG H W, TANG B, SHUI L L, LI F H, Jan GROENEWOLD, Alex HENZEN, ZHOU G F. Influence of the Hydrophilic Property of Imidazole Ionic Liquids on Electro-Fluidic Display[J]. Journal of South China Normal University (Natural Science Edition), 2018, 50(3): 29-35. doi: 10.6054/j.jscnun.2018062
Citation: DOU Y Y, DENG Y, JIANG H W, TANG B, SHUI L L, LI F H, Jan GROENEWOLD, Alex HENZEN, ZHOU G F. Influence of the Hydrophilic Property of Imidazole Ionic Liquids on Electro-Fluidic Display[J]. Journal of South China Normal University (Natural Science Edition), 2018, 50(3): 29-35. doi: 10.6054/j.jscnun.2018062

咪唑类离子液体的亲疏水性对电润湿器件性能的影响

Influence of the Hydrophilic Property of Imidazole Ionic Liquids on Electro-Fluidic Display

  • 摘要: 文中研究离子液体应用于电润湿显示器件的导电流体性能. 选取极性较大的乙基咪唑为离子液体的阳离子,改变阴离子的亲疏水性,对比了几种离子液体的温度窗口、粘度等物理性质,并重点研究了离子液体亲疏水性对电润湿特性、油墨萃取、器件响应等方面的影响. 同时,在1-乙基-3-甲基咪唑四氟硼酸盐离子液体的阳离子上添加羟基基团,得到具有更强亲水性的离子液体. 结果表明:亲水性高的离子液体在介电材料含氟聚合物表面的初始接触角比较大,对油墨中染料的萃取程度比疏水性离子液体弱,证明了电润湿器件更适合选取亲水性高的离子液体作为导电流体. 最后,以1-乙基-3-甲基咪唑二腈胺盐离子液体作为导电流体制备的电润湿器件得到了较佳的电学和光学响应性能.

     

    Abstract: Some ionic liquids (ILs) were used to be the conductive liquids of electro-fluidic displays (EFDs) in this paper. The cationic ion of the ionic liquids is 1-Ethyl-3-methylimidazolium,while the anionic ions have varied hydrophilic properties. Also OH group is added to the cationic ion of EMIMBF4 to increase the hydrophilic property of IL molecule further. The physical properties are compared, including the temperature window and viscosity. More importantly, the influence of hydrophilic property of ILs on electrowetting curve, dye extracting, and aperture voltage of EFD were discussed in this study. The results indicate that the contact angle on fluoropolymer without voltage of hydrophilic ILs is higher than the contact angle of hydrophobic IL. On the other hand, the dye extraction ability of hydrophilic IL is lower than hydrophobic IL. As a consequence, hydrophilic IL is more suitable to be conductive liquid of EFD. Furthermore, the switching results of EFD with one hydrophilic IL (EMIMDCA) as conductive liquid show good optoelectronic response properties.

     

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