resumo
Cholinium-based ionic liquids ([Ch]-based ILs) were investigated as electrolytes in the formation of aqueous biphasic systems (ABS) composed of polyethylene glycol (PEG) and sodium polyacrylate (NaPA) polymers. Both enhancement and decrease in the liquid-liquid demixing ability induced by electrolytes in PEG-NaPA aqueous biphasic systems were observed. It is shown that the ILs that most extensively partition to the PEG-rich phase tend to act as inorganic salts enhancing the two-phase formation ability, while those that display a more significant partition to the NaPA-rich phase decrease the ABS formation capacity. The gathered results allowed us to confirm the tailoring ability of ILs and to identify, for the first time, opposite effects induced by electrolytes on the PEG-NaPA ABS formation ability. The distribution of the electrolyte ions between the coexisting phases and the polyelectrolyte ion compartmentalization are key factors behind the formation of PEG-NaPA-based ABS.
palavras-chave
2-PHASE SYSTEMS; PHASE-SEPARATION; MOLECULAR-WEIGHT; PROTEIN SEPARATION; ACID) SYSTEM; POLYMER; PEG; PURIFICATION; EXTRACTION; PARTITION
categoria
Biochemistry & Molecular Biology; Chemistry, Multidisciplinary
autores
Bernardo, SC; Capela, EV; Pereira, JFB; Ventura, SPM; Freire, MG; Coutinho, JAP
nossos autores
Emanuel V. Capela
Investigador Júnior
Jorge Fernando Brandão Pereira
Estudante de doutoramento
Mara Guadalupe Freire Martins
Investigador Coordenador
Sandra Cristina da Silva Bernardo
Bolseiro de pós-Doutoramento
Sónia Patrícia Marques Ventura
Professor AuxiliarGrupos
G4 - Materiais Renováveis e Economia Circular
G5 - Materiais Biomiméticos, Biológicos e Vivos
agradecimentos
This work was developed within the scope of the project CICECO-Aveiro Institute of Materials, UIDB/50011/2020 & UIDP/50011/2020, financed by national funds through the Portuguese Foundation for Science and Technology/MCTES. JFB Pereira and CIEPQPF acknowledge the funding support from FCT through the projects UIDB/EQU/00102/2020 and UIDP/EQU/00102/2020.