二元Pluronic嵌段共聚物相互作用 II.PPO嵌段长度不等的P94/L64二元混合水溶液

Interaction of Binary Pluronic Block Molecules II.Mixed Aqueous Solutions of P94/L64 with Different PPO Block Length

用I2 探针增溶分光光度方法 ,考察了Pluronic两亲嵌段共聚物P94/L6 4二元混合水溶液的胶束化行为 ,发现在溶液体相中L6 4的质量摩尔分数XL64 <0 4时 ,由于P94/L6 4混合预胶束的形成 ,导致P94分子在较高浓度时才生成单组分胶束 ;当XL64 >0 4后 ,溶液中生成了P94/L6 4混合胶束。P94和L6 4二种分子PPO嵌段长度不同 ,造成这种不同浓度比例区间内胶束组成的差异。

Micellization of binary Puronic molecules of P94/L64 which have different length in PPO blocks has been characterized using I 2 as probe to determine the critical micelle concentration (C cmc ) of the mixtures in aqueous solutions. The results discovered that when the weight fraction of L64, X L64 <04, the micellization in binary aqueous solutions was hindered and the C cmc of P94 was enhanced to a higher value due to the formation of P94/L64 mixed pre-micelles in aqueous solution. Theses m...