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1941173 
Journal Article 
Doubly pH-responsive pickering emulsion 
Li, J; Stöver, HD 
2008 
1 
Langmuir
ISSN: 0743-7463
EISSN: 1520-5827 
24 
23 
13237-13240 
English 
18973315 
WOS:000261216500003 
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. 
Emulsions; 0; Phthalic Acids; Xylenes; Water; 059QF0KO0R; phthalic acid; 6O7F7IX66E; Silicon Dioxide; 7631-86-9; Aluminum Oxide; LMI26O6933; Index Medicus; Particle Size; Phthalic Acids -- chemistry; Water -- chemistry; Surface Properties; Aluminum Oxide -- chemistry; Xylenes -- chemistry; Molecular Structure; Nanoparticles -- chemistry; Hydrogen-Ion Concentration; Emulsions -- chemistry