title: Hollow microsphere with mesoporous shell by Pickering emulsion polymerization as a potential colloidal collector for organic contaminants in water.
abstract: Submicrometer hollow microspheres with mesoporous shells were prepared by a simple one-pot strategy. Colloidal silica particles were used as a particle stabilizer to emulsify the oil phase, which was composed of a polymerizable silicon monomer (TPM) and an inert organic solvent (PEA). The low interfacial tension between colloidal silica particles and TPM helped to form a Pickering emulsion with small droplet sizes. After the polymerization of TPM, the more hydrophobic PEA formed a liquid core, leading to a hollow structure after its removal by evaporation. BET results indicated that the shell of a hollow particle was mesoporous with a specific surface area over 400 m(2)·g(-1). With PEA as the core and silica as the shell, each resultant hollow particle had a hydrophobic cavity and an amphiphilic surface, thus serving as a good colloidal collector for hydrophobic contaminants in water.
authors.affiliation: Beijing National Laboratory for Molecular Sciences, State Key Laboratory of Polymer Physics and Chemistry, Institute of Chemistry, Chinese Academy of Sciences , Beijing 100190, China.
authors.forename: Yinyan
authors.initials: Y
authors.lastname: Guan
authors.forename: Xiaohui
authors.initials: X
authors.lastname: Meng
authors.forename: Dong
authors.initials: D
authors.lastname: Qiu
mesh_terms: D004655:Emulsions; D057927:Hydrophobic and Hydrophilic Interactions; D008863:Microspheres; D010316:Particle Size; D058105:Polymerization; D016062:Porosity; D012822:Silicon Dioxide / Q000737:chemistry*; D013499:Surface Properties; D014050:Toluene / Q000302:isolation & purification*; D014867:Water / Q000737:chemistry; D014874:Water Pollutants, Chemical / Q000302:isolation & purification*
chemical_list: D004655:Emulsions; D014874:Water Pollutants, Chemical; D014867:Water; D014050:Toluene; D012822:Silicon Dioxide