Nano titanium dioxide particles modified with poly(lauryl methacrylate) and its electrorheological and electrophoretic behavior
Nano titanium dioxide particles modified with poly(lauryl methacrylate) and its electrorheological and electrophoretic behavior
复制标题
DOI：
10.1016/j.colsurfa.2014.05.064
复制
发表时间：
2014-09-05
影响因子：
5.2
通讯作者：
Xiao, Yin
中科院分区：
文献类型：
--
作者：
Jiang, Yanping;Li, Xianggao;Xiao, Yin
本文报道了一种由纳米TiO 2改性聚甲基丙烯酸十二酯（PLMA/TiO 2）分散在低粘度异构烷烃中的新型非水电流变液，并研究了其电流变行为。首次将电流变液应用于电泳显示。以γ-甲基丙烯酰氧丙基三甲氧基硅烷和甲基丙烯酸十二酯为单体，通过接枝共聚反应制备了PLMA/TiO 2纳米粒子。纳米二氧化钛表面包覆层的厚度约为2.9nm。当外加电场为0 ~ 4.5kV/mm时，电流变液表现出良好的流变性能，粘度从20 mPas增加到160 mPas。随着分散体系中PLMA/TiO 2颗粒质量分数的增加，剪切应力增强。将电流变液作为白色介质，与炭黑混合制备微杯电泳显示器件，在电场作用下成功实现了白色和黑色两种状态的电泳显示。微杯装置的最大对比度为6.2，响应时间为288 ms，在无电场条件下，时钟微杯装置可保持显示状态24 h以上。(C)2014爱思唯尔有限公司版权所有。
In this paper, we reported a new non-aqueous electrorheological (ER) fluid structured by TiO2 nano-particle modified poly(lauryl methacrylate) (PLMA/TiO2) dispersed in low viscosity isoparaffin and studied its electrorheological behaviors. Moreover, the ER fluid was applied to electrophoretic display at the first time. PLMA/TiO2 particles were prepared via graft copolymerization using gamma-methacryloxypropyltrimethoxysilane and lauryl methacrylate, successively. The thickness of the cladding layer of nano titanium dioxide surface was about 2.9 nm. When an external electric field was applied to this dispersed system, from 0 to 4.5 kV/mm, the ER fluid showed a good rheological property and the viscosity of ER fluid was increased from 20 to 160 mPas. The shear stress strengthened with PLMA/TiO2 particles weight fraction increase in dispersed system. As a white medium, the ER fluid was mixed with carbon black to prepare a micro-cup electrophoretic display device, which could successfully realize electrophoretic display for white and black state under an electric field. The maximum contrast ratio of the micro-cup device was 6.2, and response time was 288 ms, and the clock micro-cup device could maintain display state than 24 h in the absence of electric fields. (C) 2014 Elsevier B.V. All rights reserved.