物理化学学报 >> 2005, Vol. 21 >> Issue (04): 430-434.doi: 10.3866/PKU.WHXB20050417

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电泳显示微胶囊的制备和性能

裴广玲; 王亭杰; 杨毅; 金涌   

  1. 清华大学化工系, 北京 100084
  • 收稿日期:2004-08-31 修回日期:2004-11-04 发布日期:2005-04-15
  • 通讯作者: 王亭杰 E-mail:wangtj@mail.tsinghua.edu.cn

Preparation and Properties of Microcapsules for Electrophoretic Display

PEI Guang-Ling; WANG Ting-Jie; YANG Yi; JIN Yong   

  1. Department of Chemical Engineering, Tsinghua University, Beijing 100084
  • Received:2004-08-31 Revised:2004-11-04 Published:2005-04-15
  • Contact: WANG Ting-Jie E-mail:wangtj@mail.tsinghua.edu.cn

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摘要： 以有机颜料联苯胺黄为显色粒子, 四氯乙烯和甲苯混合溶液为分散介质, 油溶性蓝N为吸光染料, 用超分散剂CH-2C分散颜料粒子, 脲醛树脂为壁材, 通过一步原位聚合法制备了电泳显示微胶囊. 通过显微镜检查微胶囊的表面形貌及粒径, 并对微胶囊内颜料粒子的电场响应特性和显示性能进行考察. 结果表明, 所得微胶囊表面光滑, 囊壁透明, 囊内颜料粒子对电场变化能够快速可逆地响应, 并具有双稳显示特性.

关键词: 电子墨水, 电泳显示, 微胶囊, 脲醛树脂, 原位聚合

Abstract: Microcapsules for electrophoretic display were prepared by in situ polymerization of urea-formaldehyde, in which organic pigment of benzidine yellow (PY-12) was used as displaying particles, tetrachloroethylene and toluene as dispersion media, oil soluble blue N dye as light absorber and super dispersant CH-2C as stabilizing agent. The morphology and size of microcapsules were checked through optical transmission microscope. The response to the change of electric field and display performance of the microcapsules were investigated. It was shown that the microcapsules without pigment particles made by this method were of good smoothness and transparence. Fast and reversible display of the microcapsules with pigment particles was achieved in an electric field.

Key words: Electrophoretic ink, Electrophoretic display, Microcapsule, Urea-formaldehyde, In situ polymerization