Stoichiometric polyelectrolyte complexes of ionic block copolymers and oppositely charged polyions
Stoichiometric polyelectrolyte complexes of ionic block copolymers and oppositely charged polyions
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DOI：
10.1063/1.2387173
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发表时间：
2006-11-21
影响因子：
4.4
通讯作者：
Reineker, P.
中科院分区：
文献类型：
--
作者：
Kramarenko, E. Yu.;Khokhlov, A. R.;Reineker, P.
用平均场理论研究了含聚电解质、亲水非离子嵌段和反电荷聚离子的两嵌段共聚物在稀溶液中的胶束化行为。在水溶液中，胶束核由聚电解质络合物(PEC)组成，而电晕则由嵌段共聚物的亲水性嵌段组成。将PEC描述为Lifshitz框架下的球体[ZH.Eksp.蒂尔。菲兹。55,2408(1968)]球体理论，我们计算了胶束核/溶剂界面的表面张力作为多离子电离度、溶剂质量和低分子质量盐浓度的函数。发现在化学计量混合组成下，嵌段共聚物和电荷相反的均聚物形成的星状胶束的平衡聚集数是系统参数的函数。结果表明，加入盐后胶束解体。(C)2006年美国物理研究所。
Micellization in dilute solutions of diblock copolymers with a polyelectrolyte and a hydrophilic nonionic blocks and oppositely charged polyions is studied using mean-field theory. In aqueous solutions the micelle core consists of the polyelectrolyte complex (PEC) while the corona is formed by hydrophilic blocks of the block copolymers. Describing PEC as a globule in the framework of the Lifshitz [Zh. Eksp. Teor. Fiz. 55, 2408 (1968)] globule theory we calculate the surface tension of the micellar core/solvent interface as a function of the polyion degree of ionization, solvent quality, and concentration of low-molecular-mass salt. The equilibrium aggregation number of starlike micelles formed by block copolymers and homopolymers of opposite charge at stoichiometric mixture compositions is found as a function of the system parameters. It is shown that micelles disintegrate upon addition of salt. (c) 2006 American Institute of Physics.