Abstract:
:It is well known that polyelectrolyte complexes and coacervates can form on mixing oppositely charged polyelectrolytes in aqueous solutions, due to mainly electrostatic attraction between the oppositely charged polymers. Here, we report the first (to the best of our knowledge) complexation and coacervation of two positively charged polyelectrolytes, which provides a new paradigm for engineering strong, self-healing interactions between polyelectrolytes underwater and a new marine mussel-inspired underwater adhesion mechanism. Unlike the conventional complex coacervate, the like-charged coacervate is aggregated by strong short-range cation-π interactions by overcoming repulsive electrostatic interactions. The resultant phase of the like-charged coacervate comprises a thin and fragile polyelectrolyte framework and round and regular pores, implying a strong electrostatic correlation among the polyelectrolyte frameworks. The like-charged coacervate possesses a very low interfacial tension, which enables this highly positively charged coacervate to be applied to capture, carry, or encapsulate anionic biomolecules and particles with a broad range of applications.
journal_name
Proc Natl Acad Sci U S Aauthors
Kim S,Huang J,Lee Y,Dutta S,Yoo HY,Jung YM,Jho Y,Zeng H,Hwang DSdoi
10.1073/pnas.1521521113subject
Has Abstractpub_date
2016-02-16 00:00:00pages
E847-53issue
7eissn
0027-8424issn
1091-6490pii
1521521113journal_volume
113pub_type
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