Effect of Hydrophilic Monomer Distribution on Self-Assembly of a pH-Responsive Copolymer: Spheres, Worms and Vesicles from a Single Copolymer Composition

Junliang Zhang, Barbara Farias-Mancilla, Ihor Kulai, Stephanie Hoeppener, Barbara Lonetti, Sylvain Prévost, Jens Ulbrich, Mathias Destarac, Olivier Colombani, Ulrich S. Schubert, Carlos Guerrero-Sanchez, Simon Harrisson

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43 引用 (Scopus)

摘要

A series of copolymers containing 50 mol % acrylic acid (AA) and 50 mol % butyl acrylate (BA) but with differing composition profiles ranging from an AA-BA diblock copolymer to a linear gradient poly(AA-grad-BA) copolymer were synthesized and their pH-responsive self-assembly behavior was investigated. While assemblies of the AA-BA diblock copolymer were kinetically frozen, the gradient-like compositions underwent reversible changes in size and morphology in response to changes in pH. In particular, a diblock copolymer consisting of two random copolymer segments of equal length (16 mol % and 84 mol % AA content, respectively) formed spherical micelles at pH >5, a mix of spherical and wormlike micelles at pH 5 and vesicles at pH 4. These assemblies were characterized by dynamic light scattering, cryo-transmission electron microscopy and small angle neutron scattering.

源语言英语
页(从-至)4925-4930
页数6
期刊Angewandte Chemie - International Edition
60
9
DOI
出版状态已出版 - 23 2月 2021

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