摘要
以改进的两步原位聚合法制备脲醛(UF)树脂电子墨水微胶囊,比较了不同系统改性剂和不同固化方式对微胶囊表面形貌及固化性能的影响。结果表明,采用氯化钠、明胶和间苯二酚为系统改性剂可以控制脲醛树脂胶粒在油水界面富集凝结,改善微胶囊的表面光滑度和致密性;调节室温下的酸处理时间,可控制脲醛树脂微胶囊的囊壁厚度,采用氯化铵做微胶囊固化剂,调节体系温度可有效控制氯化铵与甲醛的反应速度,即可得到表面光滑、干燥后不坍塌、不破损的脲醛树脂电子墨水微胶囊。
Microeapsule for electrophoretic ink display was prepared by in situ polymerization of urea-formaldehyde （UF） resin via an improved two-step approach. The effect of different system modifiers and curing approaches on the morphologies of microcapsules were compared, and the result shows NaCl, gelatin, and resorcin, as system modifiers, can effectively stimulate the assembly of resin onto the oil/water interface, resulting in smooth and compact surface of microeapsules. The shell thickness of microeapsules can be controlled via adjusting the acidizing time. While using NH4Cl as curing agent, controlling the reaction rate of urea and formaldehyde through the system temperature, mierocapsules for electrophoretic display with a smooth surface and appropriate strength to resist collapse and damage during processing are obtained.
出处
《功能材料》
EI
CAS
CSCD
北大核心
2008年第10期1608-1611,共4页
Journal of Functional Materials
基金
国家重点基础研究发展计划(973计划)资助项目(2007CB936300)
关键词
脲醛树脂
电子墨水
微胶囊
制备
固化
urea-formaldehyde resin
electrophoretic ink
microcapsule
preparation
curing
