液晶胶束理论。

Theory of liquid crystalline micelles.

机构信息

Department of Bioscience and Bioinformatics, Faculty of Computer Science and Systems Engineering, Kyushu Institute of Technology, Kawazu 680-4, Iizuka, Fukuoka 820-8502, Japan.

出版信息

J Chem Phys. 2013 Jan 21;138(3):034902. doi: 10.1063/1.4774386.

DOI:10.1063/1.4774386

PMID:23343300

Abstract

A theory is introduced to describe self-assembly of liquid crystalline AB diblock copolymers, consisting of a homopolymer (A) and a side-chain liquid crystalline polymer (B). We derive the free energy of the liquid crystalline micellar solutions and examine the equilibrium solution properties: critical micelle concentration (CMC), nematic-isotropic phase transition (NIT) of the rigid side-chains inside the micelle core, and phase separations. It is shown that there is a critical micelle size below which the NIT becomes continuous due to a packing effect. We also find re-entrant micellizations near the NIT temperature. The phase diagrams, including binodal, spinodal, CMC, and NIT curves are also examined on the temperature-concentration plane.

摘要

引入了一个理论来描述由均聚物（A）和侧链液晶聚合物（B）组成的液晶 AB 两嵌段共聚物的自组装。我们推导了液晶胶束溶液的自由能，并研究了平衡溶液性质：胶束核内刚性侧链的临界胶束浓度（CMC）、向列-各向同性相转变（NIT），以及相分离。结果表明，存在一个临界胶束尺寸，低于该尺寸，由于堆积效应，NIT 会变得连续。我们还在 NIT 温度附近发现了再进入胶束化。相图，包括双节点、旋节线、CMC 和 NIT 曲线，也在温度-浓度平面上进行了研究。