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Scaling Theory of Complex Coacervate Core Micelles

Abstract : 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.
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Submitted on : Friday, October 18, 2019 - 6:29:17 PM
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Artem Rumyantsev, Ekaterina Zhulina, Oleg Borisov. Scaling Theory of Complex Coacervate Core Micelles. ACS Macro Letters, Washington, D.C : American Chemical Society, 2018, 7 (7), pp.811-816. ⟨10.1021/acsmacrolett.8b00316⟩. ⟨hal-02320531⟩

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