Pluronic F127和P123嵌段共聚物胶束结构  

Micellar structure of pluronic F127 and P123 triblock copolymers

作　　者：林翠英[1] 邱羽[1] 江琳沁[1] 赵剑曦[1] 

机构地区：[1]福州大学化学系,福建福州350002

出　　处：《福州大学学报（自然科学版）》2000年第6期77-81,共5页Journal of Fuzhou University(Natural Science Edition)

基　　金：福建省自然科学基金资助项目!(B9810 0 0 5);福建省教委科技项目!(K2 0 0 2 2 )

摘　　要：F12 7和P12 3二种胶束相比较 ,后者的cmc值很低 ,并生成聚集数相当大的非球形胶束 ,内核成分在 30～ 4 0℃范围内基本由PPO组成 ,这种内核具有大体积且基本上由PPO构成的胶束是增溶的良好载体 .F12 7胶束很厚的PEO外壳使其在水中的分散性能好 。The composition of the core of Pluronic F127 and P123 micelles in aqueous solution has been measured by steady fluorescence emission spectrum using pyrene as a probe. Hydration of the micelle shell has been also examined using viscosity measurements. P123 had a considerably lower value of critical micelle concentration of cmc compared with F127. Within the range between 30-40℃, the core of P123 micelle mainly consisted of PPO blocks. The aggregation number of P123 micelle was 2.8 fold larger than that of F127 micelle. In summary, P123 micelles are very good microcarriers for solubilization of hydrophobic hydrocarbons. On the other hand, strong hydration in very thick shell round F127 micelle core was observed, which resulted in a good dispersion of F127 micelles in aqueous solution. At a higher temperature of 40℃, F127 micelle core consisted mainly also of PPO blocks. Therefore, F127 micelle is another choice of microcarrier for solubilization at a higher temperature.

关 键 词：PluroniC嵌段共聚物 胶束结构 内核组成 外壳水化 

分 类 号：O648.11[理学—物理化学] O635[理学—化学]