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Fast-response and monodisperse silica nanoparticles modified with ionic liquid towards electrophoretic displays
Dyes and Pigments ( IF 4.5 ) Pub Date : 2017-09-08 , DOI: 10.1016/j.dyepig.2017.09.014
Yaping Zhang , Bin Zhen , Salah Ahmed Sarhan Al-Shuja'a , Guangye Zhou , Xianggao Li , Yaqing Feng

The facile synthesis of electrophoretic particles for electrophoretic displays (EPDs) with fast response and precise image control is a challenge. In this work, monodisperse silica nanoparticles were prepared by a sol-gel process in reverse microemulsion combined with solvent-thermal treatment, and modified with ionic liquid. The silica nanoparticles before and after surface modification are all monodisperse and smooth spheres. They also own suitable densities and excellent chromaticity for EPDs. The structure of ionic liquid modifiers shows remarkably influence on surface property and electrophoretic property of modified silica nanoparticles. The modified silica nanoparticles show improved hydrophobicity favoring for dispersion stability and suspension stability in the dispersant. The surface charge performance of modified silica nanoparticles are depending on competitive cooperation between ion pairs and alkyl groups of ionic liquids, and can be adjusted through tuning ionic liquid structure. The fabricated EPD prototypes show response time of 180–191 ms in the electrophoretic display cell with 0.2 mm thickness, much faster than the commercial EPDs.



中文翻译:

离子液体修饰的快速响应和单分散二氧化硅纳米粒子,用于电泳显示

具有快速响应和精确图像控制的用于电泳显示器(EPD)的电泳粒子的简便合成是一个挑战。在这项工作中,通过溶胶-凝胶法在反向微乳液中结合溶剂热处理制备了单分散二氧化硅纳米粒子,并用离子液体对其进行了改性。表面改性前后的二氧化硅纳米粒子均为单分散和光滑的球体。它们还具有适合EPD的密度和出色的色度。离子液体改性剂的结构对改性二氧化硅纳米粒子的表面性能和电泳性能显示出显着影响。改性的二氧化硅纳米粒子显示出改善的疏水性,有利于分散剂中的分散稳定性和悬浮稳定性。改性二氧化硅纳米粒子的表面电荷性能取决于离子对和离子液体烷基之间的竞争性配合,可以通过调节离子液体结构来调节。制成的EPD原型在厚度为0.2 mm的电泳显示单元中显示180-191 ms的响应时间,比商用EPD快得多。

更新日期:2017-09-08
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