The Origins of Toroidal Micelles from a Liquid-Crystalline Triblock Copolymer

被引：12
作者：
Jin, Bixin [1 ]
Liu, Guojun [2 ]
Li, Xiaoyu [1 ,3 ,4 ]
机构：
[1] Beijing Inst Technol, Sch Mat Sci & Engn, Beijing 100081, Peoples R China
[2] Queens Univ, Dept Chem, 90 Bader Lane, Kingston, ON, Canada
[3] Beijing Inst Technol, Minist Educ, Key Lab High Energy Dens Mat, Beijing 100081, Peoples R China
[4] Beijing Inst Technol, Expt Ctr Adv Mat, Beijing 100081, Peoples R China
来源：
CHINESE JOURNAL OF CHEMISTRY | 2020年 / 38卷 / 12期
关键词：
Block copolymer; Self-assembly; Toroidal micelle; Liquid crystalline Polymer; Morphological transition; Kinetic-controlled; FIBER-LIKE MICELLES; DIBLOCK COPOLYMERS; CONTROLLED LENGTH; BLOCK-COPOLYMER; CYLINDRICAL MICELLES; CO-MICELLES; DRIVEN; MORPHOLOGY; VESICLES; UNIFORM;
D O I：
10.1002/cjoc.202000313
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
The Summary of main observation and conclusion: In this paper, we reported a systematic study on the formation mechanism of bent toroidal micelles from a triblock copolymer poly(acrylic acid)-block-(2-cinnamoyloxylethyl methacrylate)-block-poly(perfluorooctylethyl methacrylate) (PAA-b-PCEMA-b- PFMA) in the binary solvent mixture of methanol and alpha,alpha,alpha-trifluorotoluene (MeOH/TFT) through a heating-cooling procedure. It was found that the formation process of toroids was predominantly kinetic-controlled, and can be influenced by the preparation protocol, solvent composition and stirring rate of the solutions. The toroids were formed via a complicated morphological transition process. At high temperature, the polymer formed bilayered vesicles with bumpy surface, while upon cooling, the vesicles broke and unfolded into bumpy platelet micelles, which subsequently perforated into toroidal and cylindrical micelles upon further cooling. Besides the distinct and unique bumpy vesicle and platelet structures, the transformation mechanisms from vesicular to platelet, and toroidal micelles are also very intriguing, and may provide new insights into the interconversion of micellar morphologies.
引用
收藏
页码：1709 / 1717
页数：9
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