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

作　　者：窦盈莹 邓勇 蒋洪伟 唐彪[1,2] 水玲玲 李发宏[1,2,4] Jan GROENEWOLD Alex HENZEN[1,2] 周国富 DOU Yingying;DENG Yong;JIANG Hongwei;TANG Biao;SHUI Lingling;LI Fahong;Jan GROENEWOLD;Alex HENZEN;ZHOU Guofu(Guangdong Provincial Key Laboratory of Optical Information Materials and Technology∥Institute of Electronic Paper Displays,South China Academy ofAdvanced Optoelectronics,South China Normal University,Guangzhou 510006,China;National Center for International Research onGreen Optoelectronics,South China Normal University,Guangzhou 510006,China;Shenzhen Guohua Optoelectronics Tech.Co.Ltd.,Shenzhen 518110,China;Academy of Shenzhen Guohua Optoelectronics,Shenzhen 518110,China)

机构地区：[1]广东省光信息材料与技术重点实验室∥华南师范大学华南先进光电子研究院,彩色动态电子纸显示技术研究所,广州510006 [2]华南师范大学国家绿色光电子国际联合研究中心,广州510006 [3]深圳市国华光电科技有限公司,深圳518110 [4]深圳市国华光电研究院,深圳518110

出　　处：《华南师范大学学报（自然科学版）》2018年第3期29-35,共7页Journal of South China Normal University(Natural Science Edition)

基　　金：国家重点研发计划项目(2016YFB0401501); 国家自然科学基金项目(U1601651,61771204); 教育部“长江学者和创新团队发展计划”项目(IRT_17R40);教育部光信息国际合作联合实验室项目; 广东省引进创新科研团队计划项目(2011D039); 广东省科技计划项目(2016B090906004,2017A010103002); 深圳市科创委股权投资项目(GQYCZZ20150721150406); 广东省光信息材料与技术重点实验室项目(2017B030301007); 广州市类

摘　　要：研究了离子液体(ILs)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作为离子液体的阳离子,改变阴离子的亲疏水性,对比研究了几种离子液体的温度窗口、黏度等物理性质,并重点研究了离子液体的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,得到亲水性更强的离子液体.结果表明:亲水性强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强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.Some ionic liquids（ ILs） were used to be the conductive liquids of electro-fluidic displays（ EFDs）. 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 [EMIM][BF4]to increase the hydrophilic property of ILs 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 ILs. On the other hand,the dye extraction ability of hydrophilic ILs is lower than hydrophobic ILs. As a consequence,hydrophilic ILs is more suitable to be conductive liquid of EFD. Furthermore,the switching results of EFD with one hydrophilic IL（ [EMIM][DCA]） as conductive liquid show good optoelectronic response properties.

关 键 词：离子液体 电润湿 导电流体 油墨萃取 光电响应 

分 类 号：O361.4[理学—流体力学]