Concentration and temperature induced dual-responsive wormlike micelle to hydrogel transition in ionic liquid-type surfactant [C16imC9]Br aqueous solution without additives
作者： Yimin Hu , Lingling Ge , Jie Han , Rong Guo
DOI: 10.1039/C5SM01084E
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摘要: A highly viscoelastic fluid formed by the ionic liquid-type surfactant 1-hexadecyl-3-nonyl imidazolium bromide ([C16imC9]Br) in water absence of any additive was studied. The phase behavior and morphology aggregates were studied a combination rheological techniques, small-angle X-ray scattering (SAXS), cryo-etch-scanning electron microscopy (cryo-etch-SEM) freeze-fractured transmission (FF-TEM). [C16imC9]Br aqueous solutions showed interesting as function both concentration temperature, which invoked transition between wormlike micelles hydrogels. With increase concentration, solution could form (50–80 mM), hydrogels (90–110 mM) (120–180 mM). As temperature increased, also transit to micelles. unusual elastic postulated be change average micellar length.
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