| Full text | |
| Author(s): |
Toledo Hijo, Ariel A. C.
;
Maximo, Guilherme J.
;
Costa, Mariana C.
;
Cunha, Rosiane L.
;
Pereira, Jorge F. B.
;
Kurnia, Kiki A.
;
Batista, Eduardo A. C.
;
Meirelles, Antonio J. A.
Total Authors: 8
|
| Document type: | Journal article |
| Source: | Journal of Physical Chemistry B; v. 121, n. 14, p. 3177-3189, APR 13 2017. |
| Web of Science Citations: | 14 |
| Abstract | |
Protic ionic liquids (PILs) have emerged as promising compounds and attracted the interest of the industry and the academy community, due to their easy preparation and unique properties. In the context of green chemistry, the use of biocompounds, such as fatty acids, for their synthesis could disclose a possible alternative way to produce ILs with a low or nontoxic effect and, consequently, expanding their applicability in biobased processes or in the development of bioproducts. This work addressed efforts to a better comprehension of the complex solid-{[}liquid crystal]-liquid thermodynamic equilibrium of 20 new PILs synthesized by using fatty acids commonly found in vegetable oils, as well as their rheological profile and self-assembling ability. The work revealed that their phase equilibrium and physical properties are significantly impacted by the structure of the ions used for their synthesis. The use of unsaturated fatty acids and bis(2-hydroxyethyl)ammonium for the synthesis of these biobased ILs led to a drastic decreasing of their melting temperatures. Also, the longest alkyl chain fatty acids promoted higher self-assembling and more stable mesophases. Besides their sustainable appeal, the marked high viscosity, non-Newtonian profile, and very low critical micellar concentration values of the PIL crystals here disclosed make them interesting renewable compounds with potential applications as emulsifiers, stabilizers, thickeners, or biolubricants. (AU) | |
| FAPESP's process: | 14/16424-7 - Optimization and scale-up of liquid-liquid extraction process with ionic liquids (ILs) as a sustainable tool for the separation of the anti-leukemia biopharmaceutical L-asparaginase (ASPase) |
| Grantee: | Jorge Pereira |
| Support Opportunities: | Research Grants - Young Investigators Grants |
| FAPESP's process: | 14/21252-0 - Equilibrium and production processes of biofuels and bioproducts |
| Grantee: | Antonio José de Almeida Meirelles |
| Support Opportunities: | Research Projects - Thematic Grants |
| FAPESP's process: | 12/05027-1 - Solid-liquid equilibrium of fatty compounds and biodiesel flash point |
| Grantee: | Mariana Conceição da Costa |
| Support Opportunities: | Program for Research on Bioenergy (BIOEN) - Young Investigators Grants |
| FAPESP's process: | 16/08566-1 - Phase equilibrium thermodynamics for the improvement of physical properties of food bioproducts and their prediction in industrial and digestive processes |
| Grantee: | Guilherme José Maximo |
| Support Opportunities: | Regular Research Grants |
| FAPESP's process: | 14/03992-7 - Phase equilibrium thermodynamics for the comprehension and improvement of thermal and mechanical properties of lipidic biocompounds and biofuels |
| Grantee: | Guilherme José Maximo |
| Support Opportunities: | Scholarships in Brazil - Post-Doctoral |