resumo
A water-stable ionic liquid, 1-butyl-3-methylimidazolium trifluoromethanesulfonate, [C(4)mim][CF(3)SO(3)], is herein proposed to be used in the formation of aqueous biphasic systems (ABS) with a large range of mono-and disaccharides, as well as polyols. Binodal curves, tie-lines, and densities and viscosities of the co-existing aqueous phases, were determined for each ternary system. The proposed systems are low-viscous offering enhanced features over conventional polymer-based ABS. In addition, the partitioning of model biomolecules, such as L-tryptophan, caffeine, and beta-carotene, was further investigated to ascertain the applicability of such ABS. These systems are particularly interesting in the recovery of bioactive products from natural sources, while the availability of carbon-based sources to cells constitutes a major advantage in separations from fermentative media. Moreover, the use of carbohydrates in ionic-liquid-based ABS constitutes a step forward along the biorefinery concept envisaging sustainable conversions of biomass into a broad spectrum of bio-based products.
palavras-chave
2-PHASE SYSTEMS; MUTUAL SOLUBILITIES; PHASE-BEHAVIOR; EXTRACTION; TRYPTOPHAN; HYDRATION; PROTEINS; SALT; MONOSACCHARIDES; PRECIPITATION
categoria
Chemistry; Science & Technology - Other Topics
autores
Freire, MG; Louros, CLS; Rebelo, LPN; Coutinho, JAP
nossos autores
Mara Guadalupe Freire Martins
Investigador CoordenadorGrupos
G4 - Materiais Renováveis e Economia Circular
G5 - Materiais Biomiméticos, Biológicos e Vivos
agradecimentos
The authors are grateful to Fundacao para a Ciencia e a Tecnologia, SFRH/BPD/41781/2007, through the post-doctoral scholarship of M. G. Freire.