CO2/N2-switchable high internal phase Pickering emulsion stabilized by silica nanoparticles and low-cost commercial N,N-dimethyl-N-dodecylamine

Herein, we reported a CO2-triggered oil-in-water high internal phase Pickering emulsion based on silica nanoparticles functionalized in situ by a trace amount of low-cost commercial CO2-switchable surfactant, N,N-dimethyl-N-dodecyl amine (C12A). Upon alternately bubbling CO2 and N2 at a moderate conditions (35 °C, 40 mL·min−1), C12A could be reversibly switched between cationic and nonionic forms, and then adsorbed on or desorbed from the...