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Anionic Polymerization of an Amphiphilic Copolymer for Preparation of Block Copolymer Micelles Stabilized by π-π Stacking Interactions
Published on: October 10, 2016
Concurrent block copolymer polymersome stabilization and bilayer permeabilization by stimuli-regulated "traceless"
Xiaorui Wang1, Guhuan Liu, Jinming Hu
1CAS Key Laboratory of Soft Matter Chemistry, Hefei National Laboratory for Physical, Sciences at the Microscale, Department of Polymer Science and Engineering, University of Science and Technology of China, Hefei, Anhui 230026 (China).
This study presents a novel method for creating block copolymer (BCP) vesicles that can be both crosslinked and permeabilized simultaneously. This breakthrough overcomes previous limitations in polymer vesicle fabrication, enabling new applications in drug delivery and materials science.
Area of Science:
- Polymer Chemistry
- Materials Science
- Nanotechnology
Background:
- Fabricating block copolymer (BCP) vesicles, also known as polymersomes, with simultaneous covalent crosslinking and bilayer permeabilization is challenging.
- Traditional crosslinking methods often compromise membrane permeability, limiting their utility.
Purpose of the Study:
- To develop a stimuli-triggered strategy for synchronized crosslinking and permeabilization of polymersomes.
- To address the dilemma of achieving both structural integrity and controlled permeability in BCP vesicles.
Main Methods:
- Utilized amphiphilic BCPs with photolabile carbamate-caged primary amines.
- Employed light-triggered self-immolative decaging reactions to release primary amines within the hydrophobic milieu of polymersomes.
- Leveraged suppressed amine pKa for extensive amidation reactions, leading to crosslinking.
Main Results:
- Achieved synchronized covalent crosslinking and bilayer permeabilization in polymersomes.
- Demonstrated a hydrophobicity-to-hydrophilicity transition of the vesicle bilayer.
- Observed successful membrane permeabilization concurrent with vesicle crosslinking.
Conclusions:
- The developed stimuli-triggered crosslinking strategy effectively solves the challenge of simultaneous crosslinking and permeabilization in BCP vesicles.
- This method offers a new pathway for designing advanced polymersomes with tunable properties for various applications.
