Binary-component micelle and vesicle: Free energy and asymmetric distributions of amphiphiles between monolayers of vesicle

doi:10.1088/1674-1056/22/3/038201

Abstract The real-space two-dimensional self-consistent field theory (SCFT) is employed to study the free energies of micelles and vesicles constituted by binary amphiphilic diblock copolymer AB in homopolymer A. With increasing volume fraction of copolymer AB, there are morphological transitions from the circle micelles to oblate circle-like micelles, to compound structure with inverted micelles in the inner center and micelles outer layer, and to vesicles. Special attentions are paid to the role of the copolymer AB in controlling free energies of the micelles and vesicles, by examining the effect of length ratio of A/B with the fixed whole chain length of AB copolymer, the length effect of A or B block with the corresponding fixed length of B or A block, for one component of copolymer, and the effect of different amphiphile compositions for binary-component copolymer system. The quantity η is provided to describe the asymmetric density distribution of amphiphiles between the inner and outer monolayers of vesicles, and to quantify the relative asymmetric extent of the density distribution between two species of copolymers in binary component vesicles.

Keywords: binary components vesicle micelle asymmetry distribution

Received: 17 May 2012
Revised: 21 September 2012
Accepted manuscript online:

PACS:	82.35.Jk	(Copolymers, phase transitions, structure)
	83.80.Tc	(Polymer blends)
	87.16.D-	(Membranes, bilayers, and vesicles)

Fund: Project supported by the National Natural Science Foundation of China (Grant No. 20804060).

Corresponding Authors: Zhang Qi-Yi
E-mail: qyzhang520@163.com

Cite this article:

Zhang Qi-Yi (张启义), Xiang Xun (向洵) Binary-component micelle and vesicle: Free energy and asymmetric distributions of amphiphiles between monolayers of vesicle 2013 Chin. Phys. B 22 038201

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Binary-component micelle and vesicle: Free energy and asymmetric distributions of amphiphiles between monolayers of vesicle

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