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

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

中国物理B ›› 2013, Vol. 22 ›› Issue (3): 38201-038201.doi: 10.1088/1674-1056/22/3/038201

• INTERDISCIPLINARY PHYSICS AND RELATED AREAS OF SCIENCE AND TECHNOLOGY • 上一篇下一篇

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

张启义, 向洵

Department of Mathematics and Physics, Chongqing University of Science and Technology, Chongqing 401331, China

收稿日期:2012-05-17 修回日期:2012-09-21 出版日期:2013-02-01 发布日期:2013-02-01
基金资助:
Project supported by the National Natural Science Foundation of China (Grant No. 20804060).

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

Zhang Qi-Yi (张启义), Xiang Xun (向洵)

Department of Mathematics and Physics, Chongqing University of Science and Technology, Chongqing 401331, China

Received:2012-05-17 Revised:2012-09-21 Online:2013-02-01 Published:2013-02-01
Contact: Zhang Qi-Yi E-mail:qyzhang520@163.com
Supported by:
Project supported by the National Natural Science Foundation of China (Grant No. 20804060).

摘要/Abstract

摘要： 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.

关键词: binary components, vesicle, micelle, asymmetry distribution

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.

Key words: binary components, vesicle, micelle, asymmetry distribution

中图分类号: (Copolymers, phase transitions, structure)

82.35.Jk

83.80.Tc (Polymer blends) 87.16.D- (Membranes, bilayers, and vesicles)

张启义, 向洵. Binary-component micelle and vesicle: Free energy and asymmetric distributions of amphiphiles between monolayers of vesicle[J]. 中国物理B, 2013, 22(3): 38201-038201.

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[J]. Chin. Phys. B, 2013, 22(3): 38201-038201.

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

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

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