Voltar
Artigo Produção Nacional Revisado por pares
BIBTEX RIS

Equilibrium Phase Behavior for Ternary Mixtures of Poly(ethylene) Glycol 6000 + Water + Sulfate Salts at Different Temperatures

2008; American Chemical Society; Volume: 53; Issue: 10 Linguagem: Inglês

10.1021/je800443p

ISSN

1520-5134

Autores

João Paulo Martins, Fabíola Cristina de Oliveira, Jane Sélia dos Reis Coimbra, Luís Henrique Mendes da Silva, Maria do Carmo Hespanhol da Silva, Ingrid Silva Barberino do Nascimento,

Tópico(s)

Surfactants and Colloidal Systems

Resumo

Phase diagrams of aqueous two-phase systems composed of poly(ethylene) glycol (PEG) 6000 g·mol−1, lithium sulfate, sodium sulfate, and magnesium sulfate or zinc sulfate were determined at (283.15, 298.15, and 313.15) K. The effect of temperature on binodal position was not significant, indicating a small enthalpic contribution associating to the phase segregation. The ability of four sulfate salts to induce the formation of the biphasic system with PEG 6000 is as follows: ZnSO4 > MgSO4 > Na2SO4 > Li2SO4.

Referência(s)