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Phase Behavior of Glycerol Trioleate‐Based Ionic Liquid Microemulsions
Author(s) -
Wang Aili,
Chen Li,
Xu Fan,
Yan Zongcheng
Publication year - 2015
Publication title -
journal of the american oil chemists' society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.512
H-Index - 117
eISSN - 1558-9331
pISSN - 0003-021X
DOI - 10.1007/s11746-014-2565-4
Subject(s) - microemulsion , pulmonary surfactant , ionic liquid , glycerol , micelle , chemistry , phase (matter) , ionic bonding , chemical engineering , chromatography , organic chemistry , aqueous solution , ion , catalysis , engineering , biochemistry
Glycerol trioleate‐based ionic liquid microemulsions are promising biolubricant alternatives. This study presents the formation and the phase behavior of glycerol trioleate‐based ionic liquid microemulsions. Areas of the single‐phase domain were calculated to illustrate the phase‐forming capacities of the designed systems. The effects of ionic liquid anions and cations, oxyethylene groups’ number of surfactant, mass ratio of surfactant to co‐surfactant, chain length of co‐surfactant, and temperature on the phase behavior and phase‐forming capacities of glycerol trioleate‐based ionic liquid microemulsions were investigated using pseudo‐ternary phase diagrams. The results showed that the phase‐forming capacities of glycerol trioleate‐based ionic liquid microemulsions with different ionic liquids were Tf 2 N − ‐based > PF 6 − ‐based > BF 4 − ‐based, OMIM + ‐based > HMIM + ‐based > BMIM + ‐based > EMIM + ‐based. The designed systems contained ionic liquid‐glycerol trioleate amphiphilic balance; thus, glycerol trioleate‐surfactant micelles achieved the maximum solubilization capacity for the ionic liquid when the surfactant had approximately five oxyethylene groups with a surfactant to co‐surfactant mass ratio of 4:1. Moreover, increasing the temperature and the aliphatic chain length of co‐surfactant from C2 to C6 enhanced the ability of glycerol trioleate and ionic liquids to form microemulsions.