Effect of salt on self-assembly in charged block copolymer micelles

被引:94
作者
Borisov, OV [1 ]
Zhulina, EB
机构
[1] Russian Acad Sci, Inst Macromol Cpds, St Petersburg 199004, Russia
[2] LRMP, UMR 5067, F-64053 Pau, France
[3] Univ Texas, Dept Chem & Biochem, Austin, TX 78712 USA
[4] Univ Texas, Ctr Polymer Res, Austin, TX 78712 USA
关键词
D O I
10.1021/ma010934n
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
We consider self-assembly of block copolymers with one charged (polyelectrolyte) and one hydrophobic block in a salt-added solution. In the case of short hydrophobic and long polyelectrolyte block the copolymers form starlike polyelectrolyte micelles, while in the opposite case so-called crew-cut micelles are found. Upon an increase in the salt concentration the number of chains in a micelle increases, while the radius of the micellar corona weakly decreases due to enhanced screening of the Coulomb repulsion between the charged blocks. The exponents of the corresponding power-law dependences are obtained on the basis of scaling arguments and compared to the experimental observation.
引用
收藏
页码:4472 / 4480
页数:9
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