Preparation and development of functional microcapsules consisting of porous polymer as shell material

(1)萃取微胶囊的制备与开发采用原位聚合工艺，在单体浓度= 1.85 ~ 3.55M，二乙烯苯/苯乙烯比= 0.1 ~ 0.4，搅拌转速= 400 ~ 1200rpm的条件下，制备了在水溶液中提取丙酸的功能微胶囊。核心溶液是三正辛胺的正十二烷。三正辛胺微胶囊能有效地提取水溶液中的丙酸。微胶囊体系的萃取平衡与液-液体系的萃取平衡一致。速率决定步骤是微胶囊多孔膜上的孔扩散。通过改变单体浓度、二乙烯苯/苯乙烯比和微胶囊的平均直径，可以改变微胶囊的提取率。(2)微胶囊调色剂的制备与开发本研究旨在阐明以下两点。一是采用SPG膜乳化法制备单分散直径的微胶囊墨粉。三是原位聚合后形成界面聚合膜，防止芯液通过微胶囊膜渗漏。根据上述研究结果，采用SPG膜乳化法可以制备直径为5 ~ 10mum的单分散微胶囊墨粉。采用界面聚合和原位聚合的方法制备了双膜微胶囊碳粉，防止了芯液的泄漏。此外，还阐明了界面聚合聚酰胺膜比界面聚合聚酯膜具有更好的静电容量。

(1)Preparation and development of extraction microcapsules The functional microcapsules extracting propionic acid in aqueous solution were prepared by in situ polymerization processing under the condition of monomer concentration = 1.85 - 3.55M,, divinylbenzene/styrene ratio = 0.1 - 0.4 and stirring speed = 400 - 1200rpm. Core solution is n-dodecane of tri-n-octyl amine.The microcapsules containing tri-n-octyl amine effectively extracted propionic acid in aqueous solution. Furthermore, extraction equilibria in the microcapsule system agreed with the results in the liquid-liquid system. The rate-determining step was the pore diffusion through the porous membrane of microcapsules. The extraction rate was variable by changing monomer concentration, divinylbenzene/styrene ratio and average diameter of microcapsules.(2)Preparation and development of microcapsule tonerThe research has been carried out to clarify the following two points. The first is that microcapsule toner having monodispersed diameter is prepared by SPG membrane emulsification method. The last is that leakage of core solution through microcapsule membrane is prevent by the formation of interfacial polymerization membrane after in situ polymerization. As the results of the study mentioned above, monodispersed microcapsule toner which diameter is 5 to 10mum could be prepared by SPG membrane emulsification method. Microcapsule toner having double membrane by interfacial polymerization and in situ polymerization is seemed to prevent the leakage of core solution. Moreover, it is clarified that polyamide membrane by interfacial polymerization is better electrostatic capacity than polyester membrane by interfacial polymerization.