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Effect of cosolvents on the phase separation of polyelectrolyte complexes.
Ma, Yuanchi; Ivancic, Robert J S; Obrzut, Jan; Audus, Debra J; Prabhu, Vivek M.
Afiliación
  • Ma Y; College of Polymer Science and Engineering, Qingdao University of Science and Technology, Qingdao, Shandong, China. yuanchi.ma@qust.edu.cn.
  • Ivancic RJS; Materials Science and Engineering Division, Material Measurement Laboratory, National Institute of Standards and Technology, 100 Bureau Drive, Gaithersburg, MD, USA. vprabhu@nist.gov.
  • Obrzut J; Materials Science and Engineering Division, Material Measurement Laboratory, National Institute of Standards and Technology, 100 Bureau Drive, Gaithersburg, MD, USA. vprabhu@nist.gov.
  • Audus DJ; Materials Science and Engineering Division, Material Measurement Laboratory, National Institute of Standards and Technology, 100 Bureau Drive, Gaithersburg, MD, USA. vprabhu@nist.gov.
  • Prabhu VM; Materials Science and Engineering Division, Material Measurement Laboratory, National Institute of Standards and Technology, 100 Bureau Drive, Gaithersburg, MD, USA. vprabhu@nist.gov.
Soft Matter ; 2024 Sep 13.
Article en En | MEDLINE | ID: mdl-39268689
ABSTRACT
Evidence is shown that cosolvent mixtures control the coacervation of mixtures of oppositely charged polyelectrolytes. Binary and ternary solvent mixtures lead to non-monotonic solubility as a function of the average dielectric constants of the solvent mixtures. These data are rationalized by considering both electrostatic-driven phase separation and solvophobic-driven phase separation using group contribution effects on solubility parameters. These estimates are introduced into an effective Flory-Huggins interaction parameter within the framework of Voorn-Overbeek theory with variable dielectric constants and temperature dependences. Despite its simplicity, the model recovers salient experimental observations not only on their coacervate stabilities, but also on their lower critical solution temperature behaviors. These observations highlight the importance of weak van der Waals interactions in determining the phase behaviors of polyelectrolyte complexes relative to electrostatic correlations.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Soft Matter Año: 2024 Tipo del documento: Article País de afiliación: China Pais de publicación: Reino Unido
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Soft Matter Año: 2024 Tipo del documento: Article País de afiliación: China Pais de publicación: Reino Unido