Multilayered polymersome formed by amphiphilic asymmetric macromolecular brushes

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Please use this identifier to cite or link to this item: https://ir.lib.ncu.edu.tw/handle/987654321/100308

Title:	Multilayered polymersome formed by amphiphilic asymmetric macromolecular brushes
Authors:	曹恆光;Chang, Hung-Yu;Lin, Yung-Lung;Sheng, Yu-Jane;Tsao, Heng-Kwong
Contributors:	工學院化學工程與材料工程學系
Keywords:	Applied sciences;Exact sciences and technology;micelles;molecular dynamics;Organic polymers;Physicochemistry of polymers;polymers;Properties and characterization;Solution and gel properties;solvents;temperature
Date:	2012-06-12
Issue Date:	2026-04-21 13:57:02 (UTC+8)
Publisher:	American Chemical Society;Washington, DC: American Chemical Society
Abstract:	摘要： Well-defined amphiphilic asymmetric macromolecular brushes were synthesized recently and were able to self-assemble into vesicles in selective solvents. The self-assembly of polymer brushes consisting of a solvophobic backbone attached with two different side chains, solvophilic and amphiphilic diblock, is explored by dissipative particle dynamics. Dependent on the block length, molecular architecture, and grafting density, the multicompartment aggregate exhibits a rich variety of morphological conformations, including five types of vesicles: porous aggregates, worm-like micelles, donut micelles, hamburger micelles, and unimolecular micelles. For certain polymer brushes, atypical polymersomes with asymmetric multilayered membranes are spontaneously formed. In addition, temperature variation induced morphological transformation from an asymmetric four-layered polymersome to a symmetric seven-layered polymersome is observed for polymer brushes containing a thermoresponsive block. Consequently, the resulting polymersome decreases in size quite sharply as temperature exceeds lower critical solution temperature. These simulation findings are consistent with experimental observations. By varying the lengths of various blocks, the morphological phase diagram and internal structures of the resulting aggregates are obtained. At a fixed composition of polymer brushes, the aggregate morphology varies with the structural arrangement of the two solvophilic blocks in the molecule. Asymmetric polymersomes are formed when the two solvophilic blocks are separately attached to the backbone and side chain. Although asymmetric vesicles are observed at moderate grafting density, unique donut aggregates are formed for high density but hamburger micelles develop at low density. 其他題名： Macromolecules 出版者： Washington, DC: American Chemical Society 出版日期： 2012-06-12 出處： Macromolecules, 2012-06, Vol.45 (11), p.4778-4789 資源來源： American Chemical Society Journals 版權： Copyright © 2012 American Chemical Society 版權： 2015 INIST-CNRS 識別號： ISSN: 0024-9297 識別號： ISSN: 1520-5835 識別號： EISSN: 1520-5835 識別號： DOI: 10.1021/ma3007366 識別號： CODEN: MAMOBX
Appears in Collections:	[Department of Chemical and Materials Engineering] journal & Dissertation

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