Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/327663
Type: Artigo
Title: Solid-liquid Equilibria Of Binary Mixtures Of Fluorinated Ionic Liquids
Author: Teles
Ana Rita R.; Correia
Helga; Maximo
Guilherme J.; Rebelo
Luis P. N.; Freire
Mara G.; Pereiro
Ana B.; Coutinhoa
Joao A. P.
Abstract: Within ionic liquids, fluorinated ionic liquids (FILs) present unique physico-chemical properties and potential applications in several fields. However, the melting point of these neoteric compounds is usually higher due to the presence of fluorine atoms. This drawback may be resolved by, for instance, mixing different FILs to create eutectic mixtures. In this work, binary mixtures of fluoro-containing and fluorinated ionic liquids were considered with the aim of decreasing their melting temperatures as well as understanding and characterizing these mixtures and their phase transitions. Five FILs were selected, allowing the investigation of four binary mixtures, each of them with a common ion. Their solid-liquid and solid-solid equilibria were studied by differential scanning calorimetry and the non-ideality of the mixtures was investigated. Overall, a variety of solid-liquid equilibria with systems exhibiting eutectic behavior, polymorphs with solid-solid phase transitions, and the formation of intermediate compounds and solid solutions were surprisingly found. In addition to these intriguing behaviours, novel FILs with lower melting temperatures were obtained by the formation of binary systems, thus enlarging the application range of FILs at lower temperatures.
Editor: Royal Soc Chemistry
Cambrigde
Rights: fechado
Identifier DOI: 10.1039/c6cp05372f
Address: http://pubs.rsc.org/en/content/articlelanding/2016/cp/c6cp05372f#!divAbstract
Date Issue: 2016
Appears in Collections:Unicamp - Artigos e Outros Documentos

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