Smart Emulsions Stabilized by a Multi‐headgroup Surfactant Tolerant to High Concentrations of Acids and Salts
Wanqing Zhang,
Bernard P. Binks,
Jianzhong Jiang
et al.
Abstract:Retaining emulsions stable at high acidity and salinity is still a great challenge. Here, we report a novel multi‐headgroup surfactant (C3H7‐NH+(C10COOH)2, di‐UAPAc) which can be reversibly transformed between cationic, anionic and zwitterionic forms upon pH variation. Stable oil‐in‐dispersion (OID) emulsions in strong acid (pH = 2) can be co‐stabilized by low concentrations of di‐UAPAc and silica nanoparticles. High salinity at pH = 2 improves the adsorption of di‐UAPAc on silica particles through hydrogen bo… Show more
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