Centre for Organic Electronics, The University of Newcastle, Callaghan, New South Wales, 2308, Australia.
Langmuir. 2012 Sep 18;28(37):13224-31. doi: 10.1021/la302184h. Epub 2012 Sep 7.
Surface tensiometry and neutron reflectivity have been used to elucidate the structure of the adsorbed layer of nonionic surfactant tetraethylene glycol tetradecyl ether (C(14)E(4)) at the free surface of the ionic liquids ethylammonium nitrate (EAN) and ethanolammonium nitrate (EtAN) and their binary mixtures with each other and with water. Surface tensions reveal that the critical micelle concentration (cmc) depends strongly on solvent composition. The adsorbed surfactant structure elucidated by neutron reflectivity shows that the level of solvation of the ethylene oxide groups varies for both the pure and mixed solvents. This is attributed to solvent-solvent interactions dominating solvent-surfactant interactions.
表面张力法和中子反射法已被用于阐明离子液体硝酸乙基铵（EAN）和乙醇硝酸铵（EtAN）及其与水的相互二元混合物的自由表面上，非离子表面活性剂四乙二醇十四醚（C(14)E(4)) 的吸附层结构。表面张力表明临界胶束浓度（cmc）强烈依赖于溶剂组成。由中子反射法阐明的吸附表面活性剂结构表明，对于纯溶剂和混合溶剂，氧化乙烯基团的溶剂化程度都有所不同。这归因于溶剂-溶剂相互作用支配了溶剂-表面活性剂相互作用。
