Rumyantsev Artem M, Zhulina Ekaterina B, Borisov Oleg V
Institut des Sciences Analytiques et de Physico-Chimie pour l'Environnement et les Matériaux, UMR 5254 CNRS UPPA, Pau, France.
Institute of Macromolecular Compounds, Russian Academy of Sciences, 199004 St. Petersburg, Russia.
ACS Macro Lett. 2018 Jul 17;7(7):811-816. doi: 10.1021/acsmacrolett.8b00316. Epub 2018 Jun 22.
We propose scaling theory of complex coacervate core micelles (C3Ms). Such micelles arise upon electrostatically driven coassembly of bis-hydrophilic ionic/nonionic diblock copolymers with oppositely charged ionic blocks or bis-hydrophilic diblock copolymers with oppositely charged macroions. Structural properties of the C3Ms are studied as a function of the copolymer composition, degree of ionization of the ionic blocks, and ionic strength of the solution. It is demonstrated that at sufficiently large length of the polyelectrolyte blocks the C3Ms may exhibit polymorphism; that is, morphological transitions from spherical to cylindrical micelles and further to lamellar structure or polymersomes may be triggered by increasing salt concentration. A diagram of states of micellar aggregates in the salt concentration/ionization degree coordinates is constructed, and scaling laws for experimentally measurable properties, e.g., micelle aggregation number and core and corona sizes, are found.
我们提出了复合凝聚层核心胶束（C3M）的标度理论。此类胶束是由双亲性离子/非离子二嵌段共聚物与带相反电荷的离子嵌段通过静电驱动共组装形成的，或者是由带相反电荷的大离子的双亲性二嵌段共聚物形成的。研究了C3M的结构性质与共聚物组成、离子嵌段的电离度以及溶液离子强度之间的函数关系。结果表明，在聚电解质嵌段长度足够大时，C3M可能表现出多态性；也就是说，盐浓度的增加可能引发从球形胶束到圆柱形胶束，进而到层状结构或聚合物囊泡的形态转变。构建了盐浓度/电离度坐标下胶束聚集体的状态图，并发现了实验可测量性质（如胶束聚集数以及核与冠尺寸）的标度律。
