Doubly pH-responsive pickering emulsion.
A pH-responsive Pickering emulsion has been designed on the basis of commercially available alumina-coated silica nanoparticles (Ludox CL silica particles) and potassium hydrogen phthalate (KHP). KHP was found to bind to cationic particle surfaces at pH values between 3.5 and 5.5, enabling the resulting surface-active particles to stabilize emulsions of xylenes in water. Above and below this pH range, the system demulsifies, resulting in a reversible Pickering emulsifier having two pH-controlled, reversible transitions.
Li
Jian
J
Department of Chemistry, McMaster University, Hamilton, ON, Canada L8S 4M1.
Stöver
Harald D H
HD
D000537:Aluminum Oxide / Q000737:chemistry; D004655:Emulsions / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D015394:Molecular Structure; D053758:Nanoparticles / Q000737:chemistry; D010316:Particle Size; D010795:Phthalic Acids / Q000737:chemistry; D012822:Silicon Dioxide; D013499:Surface Properties; D014867:Water / Q000737:chemistry; D014992:Xylenes / Q000737:chemistry
D004655:Emulsions; D010795:Phthalic Acids; D014992:Xylenes; D014867:Water; C032279:phthalic acid; D012822:Silicon Dioxide; D000537:Aluminum Oxide