Self-Assembly into Multicompartment Micelles and Selective Solubilization by Hydrophilic鈭扡ipophilic鈭扚luorophilic Block Copolymers

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• 作者：Jean-Noe虉l Marsat ; Matthias Heydenreich ; Erich Kleinpeter ; Hans v. Berlepsch ; Christoph Bo虉ttcher ; Andre虂 Laschewsky
• 刊名：Macromolecules
• 出版年：2011
• 出版时间：April 12, 2011
• 年：2011
• 卷：44
• 期：7
• 页码：2092-2105
• 全文大小：1331K
• 年卷期：v.44,no.7(April 12, 2011)
• ISSN：1520-5835

文摘

Amphiphilic linear ternary block copolymers (ABC) were synthesized in three consecutive steps by the reversible addition鈭抐ragmentation chain transfer (RAFT) method. Using oligo(ethylene oxide) monomethyl ether acrylate, benzyl acrylate, and 1H,1H-perfluorobutyl acrylate monomers, the triblock copolymers consist of a hydrophilic (A), a lipophilic (B), and a fluorophilic (C) block. The block sequence of the triphilic copolymers was varied systematically to provide all possible variations: ABC, ACB, and BAC. All blocks have glass transition temperatures below 0 掳C. Self-assembly into spherical micellar aggregates was observed in aqueous solution, where hydrophobic cores undergo local phase separation into various ultrastructures as shown by cryogenic transmission electron microscopy (cryo-TEM). Selective solubilization of substantial quantities of hydrocarbon and fluorocarbon low molar mass compounds by the lipophilic and fluorophilic block, respectively, is demonstrated.