摘要
利用脲甲醛树脂为壁材制备了以酞菁蓝BGS(β CuPc)颗粒分散在四氯乙烯(TCE)中的悬浮液为核材料的蓝色电子墨水微胶囊。研究了不同改性剂与表面活性剂对β CuPc颗粒的改性效果及在TCE中的分散性、TCE/水界面张力及囊内β CuPc微颗粒在胶囊内表面的吸附的影响。结果表明,用十八胺(ODA)改性的β CuPc颗粒在TCE中的分散性有很大程度提高,其电泳移动速度是未改性前的20倍;TCE/水间的界面张力越大越有利于微胶囊的形成;在TCE中的油溶性表面活性剂Span 80的浓度不低于0.062mmol/L时,β CuPc颗粒在胶囊内表面吸附被阻止。在100V/mm的直流电场下,微胶囊囊内TCE中分散的β CuPc颗粒表现出良好的可逆移动特征。
Blue electronic ink microcapsules containing phthalocyanine blue BGS (β-CuPc) particles homodispersed in tetrachloroethylene (TCE) were prepared by in situ polymerization using Urea-formal-dehyde (UF) as wall material. The effects of the various process parameters, such as the type of surface modifier, the type of water-soluble surfactant as well as the concentration of oil-soluble surfactant in TCE, on the dispersity of β-CuPc particles in TCE, and the interfacial tension of oil droplet/water and the adsorption of β-CuPc particles on internal surface of wall were experimentally investigated. It was shown that using octadecylamine (ODA) to modify β-CuPc particles resulted in a significant increase of dispersing extent and migration speed by electrophoresis in TCE (about 4 and 20 times than that of unmodified). On the other hand, as the interfacial tension of emulsion droplet/water was big enough, the microcapsule formed. The concentration of Span-80 in TCE was no less than 0.062 mmol/L, the adsorption of β-CuPc particles on internal surface of wall were blocked. Finally, a homodispersed solution (core material) and microcapsule in which β-CuPc particles have response of electric field were obtained.
出处
《液晶与显示》
CAS
CSCD
2004年第6期434-439,共6页
Chinese Journal of Liquid Crystals and Displays
基金
国家自然科学基金重大研究计划项目(No.90101005)
国家杰出青年科学基金(No.50025207)
西北工业大学研究生创业种子基金(No.Z20030095)
关键词
电子墨水
微胶囊
酞菁蓝BGS
表面活性剂
电场响应
electronic ink
microcapsule
phthalocyanine blue BGS
surfactant
electric field response
