Complexation and coacervation of like-charged polyelectrolytes inspired by mussels
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 coace...
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| Veröffentlicht in: | Proceedings of the National Academy of Sciences - PNAS 2016-02, Vol.113 (7), p.E847-E853 |
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| container_title | Proceedings of the National Academy of Sciences - PNAS |
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| creator | Kim, Sangsik Huang, Jun Lee, Yongjin Dutta, Sandipan Yoo, Hee Young Jung, Young Mee Jho, YongSeok Zeng, Hongbo Hwang, Dong Soo |
| description | 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. |
| doi_str_mv | 10.1073/pnas.1521521113 |
| format | Article |
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| subjects | Animals Aqueous solutions Biological Sciences Bivalvia - chemistry Correlation analysis Electrolytes Electrolytes - chemistry Electrostatics Molecules Mollusks PNAS Plus Polymers Surface Properties |
| title | Complexation and coacervation of like-charged polyelectrolytes inspired by mussels |
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