Abstract
Microemulsions were formulated with the ionic liquid ethylammonium nitrate (EAN) used instead of water as the polar phase, hydrocarbon solvents (n-alkanes) and sugar-based non-ionic surfactants, and their phase behaviour and microstructure were investigated. The sugar-based non-ionic surfactants used are non-toxic, biodegradable and environmentally friendly. Due to these properties, their use in microemulsion systems is a clear alternative to the conventionally used non-ionic surfactants from the class of alkyl polyoxyethylene ethers (C i E j ). The influence of n-alkanes with different chain lengths and of sugar-based nonionic surfactants with hydrophobic chains of different lengths on the microemulsion system was also investigated. The results obtained for the microemulsions with EAN described here are similar to those obtained for microemulsion systems formulated with water as the polar solvent. Liquid crystalline (LC) phases were observed in microemulsion systems with sugar-based nonionic surfactants having longer hydrocarbon chains, at lower temperatures and higher surfactant mass fraction.
Über die Autoren
Shehnaz H. Solanki is a research scholar at Navrachana University Vadodara. Ms. Solanki completed her post-graduation with specialization in Inorganic Chemistry from The Maharaja Sayajirao University of Baroda, Vadodara, India.
Sandeep R. Patil is currently Associate Professor and Program Chair of Chemistry at Navrachana University Vadodara. Dr. Patil obtained his PhD degree in Chemistry from The Maharaja Sayajirao University of Baroda, Vadodara, India in the year 2005. As a post-doctoral researcher he worked at the University Pierre et Marie Curie, Paris, France, in 2005–2006 and at University College Dublin, Ireland, in 2006–2008.
Acknowledgment
We are thankful to Prof. Nilay Yajnik, Provost, and Management of Navrachana University Vadodara for infrastructure facilities. We are thankful to Dr. Surendra Singh, Department of Chemistry, the University of Delhi for help in the synthesis of EAN.
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Author contributions: All the authors have accepted responsibility for the entire content of this submitted manuscript and approved submission.
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Research funding: We are grateful to the Science and Engineering Research Board Department of Science and Technology (S.E.R.B-D.S.T.) New Delhi, Government of India (Reference No. SB/FT/CS-083/2013) for financial support.
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Conflict of interest statement: The authors declare no conflicts of interest regarding this article.
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