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Adjacent cationic-aromatic sequences yield strong electrostatic adhesion of hydrogels in seawater

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Title: Adjacent cationic-aromatic sequences yield strong electrostatic adhesion of hydrogels in seawater
Authors: Fan, Hailong Browse this author
Wang, Jiahui Browse this author
Tao, Zhen Browse this author
Huang, Junchao Browse this author
Rao, Ping Browse this author
Kurokawa, Takayuki Browse this author →KAKEN DB
Gong, Jian Ping Browse this author →KAKEN DB
Issue Date: 12-Nov-2019
Publisher: Nature Publishing Group
Journal Title: Nature communications
Volume: 10
Issue: 1
Start Page: 5127
Publisher DOI: 10.1038/s41467-019-13171-9
PMID: 31719537
Abstract: Electrostatic interaction is strong but usually diminishes in high ionic-strength environments. Biosystems can use this interaction through adjacent cationic-aromatic amino acids sequence of proteins even in a saline medium. Application of such specific sequence to the development of cationic polymer materials adhesive to negatively charged surfaces in saline environments is challenging due to the difficulty in controlling the copolymer sequences. Here, we discover that copolymers with adjacent cation-aromatic sequences can be synthesized through cation-ic complex-aided free-radical polymerization. Sequence controlled hydrogels from diverse cation/aromatic monomers exhibit fast, strong but reversible adhesion to negatively charged surfaces in seawater. Aromatics on copolymers are found to enhance the electrostatic interactions of their adjacent cationic residues to the counter surfaces, even in a high ionic-strength medium that screens the electrostatic interaction for common polyelectrolytes. This work opens a pathway to develop adhesives using saline water.
Type: article
Appears in Collections:生命科学院・先端生命科学研究院 (Graduate School of Life Science / Faculty of Advanced Life Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
国際連携研究教育局 : GI-CoRE (Global Institution for Collaborative Research and Education : GI-CoRE) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

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