title: Synthesis and characterization of β-CD-coated polystyrene microspheres by γ-ray radiation emulsion polymerization.
abstract: Polystyrene (PS) microspheres coated with β-cyclodextrin (β-CD) were fabricated via γ-ray-induced emulsion polymerization in a ternary system of styrene/β-CD/water (St/β-CD/water). The solid inclusion complex of St and β-CD particles formed at the St droplets-water interface can stabilize the emulsion as the surfactant. TEM and XPS results showed that β-CD remains on the surface of PS particles. The average size of the PS particles increases from 186 to 294 nm as the weight ratio of β-CD to St rises from 5% to 12.5%. The water contact angle (CA) of PS latex film is lower than 90°, and reduces with the β-CD content even to 36°. Thus, this work provides a new and one-pot strategy to surface hydrophilic modification on hydrophobic polymer particles with cyclodextrins through radiation emulsion polymerization.
authors.affiliation: CAS Key Laboratory of Soft Matter Chemistry, Department of Polymer Science and Engineering, University of Science and Technology of China and USTC-CityU Joint Advanced Research Center, Suzhou, PR China. pstwmz@ustc.edu.cn
authors.forename: Dezhi
authors.initials: D
authors.lastname: Xu
authors.forename: Mozhen
authors.initials: M
authors.lastname: Wang
authors.forename: Xuewu
authors.initials: X
authors.lastname: Ge
authors.forename: Michael Hon-Wah
authors.initials: MH
authors.lastname: Lam
mesh_terms: D004655:Emulsions / Q000737:chemistry*; D005720:Gamma Rays; D057927:Hydrophobic and Hydrophilic Interactions; D008863:Microspheres; D058105:Polymerization; D019904:Polymethyl Methacrylate / Q000737:chemistry; D011137:Polystyrenes / Q000737:chemistry*; D014867:Water / Q000737:chemistry; D047392:beta-Cyclodextrins / Q000737:chemistry*
chemical_list: D004655:Emulsions; D011137:Polystyrenes; D047392:beta-Cyclodextrins; D014867:Water; D019904:Polymethyl Methacrylate; C031215:betadex