文献类型：期刊文献

英文题名：Supramolecular "Step Polymerization" of Preassembled Micelles: A Study of "Polymerization" Kinetics

作者：Yang, Chaoying[1];Ma, Xiaodong[1];Lin, Jiaping[1];Wang, Liquan[1];Lu, Yingqing[1];Zhang, Liangshun[1];Cai, Chunhua[1];Gao, Liang[1]

机构：[1]East China Univ Sci & Technol, Sch Mat Sci & Engn, Shanghai Key Lab Adv Polymer Mat,Minist Educ, State Key Lab Bioreactor Engn,Key Lab Ultrafine M, Shanghai 200237, Peoples R China

年份：2018

卷号：39

期号：5

外文期刊名：MACROMOLECULAR RAPID COMMUNICATIONS

收录：;EI(收录号：20175004525321);WOS:【SCI-EXPANDED(收录号:WOS:000426647000012)】；

基金：C.Y. and X.M. contributed equally to this work. This work was supported by the National Natural Science Foundation of China (21234002, 21474029, 51573049). Supports from projects of the Shanghai municipality (16520721900, 14DZ2261205) and fundamental research funds for the central university (222201717021) are also appreciated.

语种：英文

外文关键词：kinetics; micelles; simulations; supramolecular structures

摘要：In nature, sophisticated functional materials are created through hierarchical self-assembly of nanoscale motifs, which has inspired the fabrication of man-made materials with complex architectures for a variety of applications. Herein, a kinetic study on the self-assembly of spindle-like micelles preassembled from polypeptide graft copolymers is reported. The addition of dimethylformamide and, subsequently, a selective solvent (water) can generate a "reactive point" at both ends of the spindles as a result of the existence of structural defects, which induces the "polymerization" of the spindles into nanowires. Experimental results combined with dissipative particle dynamics simulations show that the polymerization of the micellar subunits follows a step-growth polymerization mechanism with a second-order reaction characteristic. The assembly rate of the micelles is dependent on the subunit concentration and on the activity of the reactive points. The present work reveals a law governing the self-assembly kinetics of micelles with structural defects and opens the door for the construction of hierarchical structures with a controllable size through supramolecular step polymerization.