title: In situ formed Mg(OH)2 nanoparticles as pH-switchable stabilizers for emulsions.
abstract: Different from traditional methods for preparing pH-switchable Pickering emulsifiers, a simple and straightforward approach is established on the basis of a reversible process between in situ formation and dissolution of Mg(OH)(2) nanoparticles (MHp). It was found that when pH value was above 9.5, emulsions of liquid paraffin-in-water can be stabilized by the resulting surface-active particles. Below this pH, emulsions demulsify, resulting in a reversible Pickering emulsifier. Based on the strongly pH-dependent precipitation of metal hydroxide nanoparticles, this procedure offers a new way to design pH-switchable emulsifiers without aid of any other organic matters.
authors.affiliation: Key Laboratory of Colloid and Interface Chemistry, Shandong University, Ministry of Education, Jinan, 250100 Shandong, PR China.
authors.forename: Junjun
authors.initials: J
authors.lastname: Tan
authors.forename: Jun
authors.initials: J
authors.lastname: Wang
authors.forename: Liya
authors.initials: L
authors.lastname: Wang
authors.forename: Jian
authors.initials: J
authors.lastname: Xu
authors.forename: Dejun
authors.initials: D
authors.lastname: Sun
mesh_terms: D004655:Emulsions / Q000737:chemistry; D006863:Hydrogen-Ion Concentration; D008276:Magnesium Hydroxide / Q000737:chemistry*; D053758:Nanoparticles / Q000737:chemistry*; D010316:Particle Size; D013499:Surface Properties
chemical_list: D004655:Emulsions; D008276:Magnesium Hydroxide