Please use this identifier to cite or link to this item: http://www.repositorio.ufop.br/handle/123456789/11171
Title: Equilibrium phase behavior of aqueous two-phase system formed by triblock copolymer þ sulfate salt þ water at different temperatures.
Authors: Gonçalves, Laryssa Fernanda da Silva
Felisberto, Nehander Carlos Mendes
Silva, Keycianne da Cruz
Mageste, Aparecida Barbosa
Rodrigues, Guilherme Dias
Lemos, Leandro Rodrigues de
Keywords: Phase diagram
Brønsted acids
Issue Date: 2018
Citation: GONÇALVES, L. F. da S. et al. Equilibrium phase behavior of aqueous two-phase system formed by triblock copolymer þ sulfate salt þ water at different temperatures. Fluid Phase Equilibria, v. 478, p. 145-152, dez. 2018. Disponível em: <https://www.sciencedirect.com/science/article/pii/S0378381218303960>. Acesso em: 7 mar. 2019.
Abstract: Equilibrium data for the ternary liquid-liquid system formed of a triblock copolymer (L64 or F68), sulfate salts (Cu(II) or Fe(III)) and water were investigated in this work. The effects of temperature (278.15, 288.15 and 298.15 K), the nature of the cation and the copolymer molar mass on the phase diagram of the aqueous two-phase system were investigated. An increase in temperature decreased the biphasic region for the entire system. Cu(II) and F68 were better able to induce phase separation compared to Fe(III) and L64. The nature of the cation and the copolymer molar mass effect are discussed as a function of the formation of aqua acids through the reaction between the cation and water (Brønsted acids) and in relation to Flory-Huggins theory for macromolecule solutions, respectively. The consistencies of the tie line and binodal curve experimental compositions were evaluated by applying the Othmer-Tobias and Merchuk correlations, respectively.
URI: http://www.repositorio.ufop.br/handle/123456789/11171
metadata.dc.identifier.uri2: https://www.sciencedirect.com/science/article/pii/S0378381218303960
metadata.dc.identifier.doi: https://doi.org/10.1016/j.fluid.2018.09.016
ISSN: 0378-3812
Appears in Collections:DEQUI - Artigos publicados em periódicos

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