摘要
优化预聚体聚合反应条件,用正交设计方法研究了反应条件对预聚体特性粘数的影响.结果表明, 在反应时间60 min、溶液pH=9.0、温度75℃和脲甲醛摩尔比1:1.75条件下,合成的预聚体特性粘数达到1.5以上.以具有不同特性粘数的预聚体为单体,酞菁蓝BGS(PB 15:3)均匀分散在四氯乙烯(TCE)中的悬浮液为核材料,制备蓝色电子墨水微胶囊,研究了电子墨水微胶囊的性能与预聚体特性粘数关系.结果表明,随着预聚体特性粘数增大,所制备微胶囊的平均粒径减小,机械强度增大,表面粗糙程度降低.用优化条件制备的蓝色电子墨水,其中的微胶囊颗粒表现出良好的可逆移动特征.
In order to optimize the polymerization conditions of urea-formaldehyde (UF) prepolymer, the orthogonal design method was used to study the effect of the polymerization conditions on the limiting viscosity number of prepolymer. The results indicate that the optimal conditions are: T = 75°C, t = 60 min, the mole rate of U/F = 1:1.75 and pH = 9.0. The limiting viscosity number of UF prepolymer prepared at the optimal conditions was above 1.5. UF prepolymer with different limiting viscosity numbers was used to prepare the blue electronic ink microcapsules containing an electrophoretic display liquid (surface modified phthalocyanine blue BGS dispersed in tetrachloroethylene (TCE)). It was founded that the mean diameter of capsules reduced, the mechanical intensity heightened and the surface roughness decreased with the increase of the limiting viscosity number. The blue display particles homodispersed inside the capsule can move reversibly under a 0.1 V/μm DC electric field.
出处
《材料研究学报》
EI
CAS
CSCD
北大核心
2005年第2期147-152,共6页
Chinese Journal of Materials Research
基金
国家自然科学基金重大研究计划90101005国家杰出青年科学基金50025207西北工业大学研究生创业种子基金Z20030095资助项目~~
关键词
有机高分子材料
电子墨水
脲甲醛
预聚体
Chemical reactions
Electrons
Optimization
Polymerization
Polymers
Urea formaldehyde resins
