Double-stimuli Responsive O/W Emulsion Gel Based on a Novel Amidoamine Surfactant

Exploring the Multifunctionality of a Novel Long-Chain Amidoamine Amphiphile

“…We demonstrated that heat-induced gels can also be prepared using HCl, and the sol-gel transition temperatures also decrease linearly with increasing C18AA concentration 13 . Interestingly, the solgel transition of the O/W emulsions was also very sensitive to pH, and it was possible to reversibly control the sol-gel phase transition by changing the pH over many cycles 13 .…”

“…Heat-induced gels have attracted considerable attention as injectable drug-delivery systems; however, the number of such reports is limited. Interestingly, an opaque emulsion of C18AA shows a heat-induced gelation property, namely, it forms a rigid gel state at higher temperatures 9,13,19 . The emulsion can be prepared simple by adding small amounts of aqueous solution of LiCl 0.1 M into C18AA toluene gel.…”

“…9,13 . The rigidity of organogels formed from C18AA is equal to that observed for typical low-molecular-weight gelators.…”

Reversible dispersion–precipitation of single-walled carbon nanotubes by pH change and addition of organic components

“…We examined the dispersion state of SWCNTs in 2 wt% C18AA aqueous solution at a high pH value of 11.5, because the terminal amine groups of C18AA are deprotonated and protonated below and above pH B 9.5, respectively. 28,34 The color and transmittance of the dispersion remained black and B10%, respectively (Fig. 5).…”

Ion-specific Effect on Oil-in-water Emulsion Gels Containing a Stimuli-responsive Fibrous Assembly of Amidoamine-derivative Hydrogelator

“…In other words, stimuli-responsive emulsions could be obtained by introducing suitable functional materials in the continuous phase, and the stimuli-responsiveness could be tuned by additives. Previously, we investigated heat- 16 and pH-induced 17 toluene/water emulsion gels using an amidoamine derivative C18AA Fig. 1a as an emulsifier.…”