期刊
POLYMERS
卷 6, 期 6, 页码 1756-1772出版社
MDPI AG
DOI: 10.3390/polym6061756
关键词
complex coacervation; polyelectrolyte complex; ionic strength; multivalent; charge density; poly(acrylic acid); poly(allylamine)
资金
- University of Chicago
- U.S. Department of Energy Office of Science program in Basic Energy Sciences and the Materials Sciences and Engineering Division
Complex coacervation is an electrostatically-driven phase separation phenomenon that is utilized in a wide range of everyday applications and is of great interest for the creation of self-assembled materials. Here, we utilized turbidity to characterize the effect of salt type on coacervate formation using two vinyl polyelectrolytes, poly(acrylic acid sodium salt) (pAA) and poly(allylamine hydrochloride) (pAH), as simple models for industrial and biological coacervates. We confirmed the dominant role of salt valence on the extent of coacervate formation, while demonstrating the presence of significant secondary effects, which can be described by Hofmeister-like behavior. These results revealed the importance of ion-specific interactions, which are crucial for the informed design of coacervate-based materials for use in complex ionic environments, and can enable more detailed theoretical investigations on the role of subtle electrostatic and thermodynamic effects in complex coacervation.
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