Synthesis of Monodisperse Titania/Polymer Core-shell Hybrid Microspheres
作者：Longyu Li, Dianbin Qin, Xinlin Yang*, Guangyu Liu
關(guān)鍵字：Titania/polymer core-shell, Distillation precipitation polymerization
論文來源：期刊
具體來源：Colloid Polym. Sci., 288 (2), 199-206 (2010). DOI: 10.1007/s00396-009-2172-3
發(fā)表時(shí)間：2010年
Monodisperse titania/polymer core-shell microspheres were prepared by a two-stage reaction with titania as core and poly(ethyleneglycol dimethacrylate) (PEGDMA)
as shell, in which the titania cores were synthesized by a sol-gel method and subsequently grafted with 3-trimethoxysilyl methacrylate as the first-stage reaction to incorporate the vinyl groups on the surface of inorganic core. The PEGDMA shell was then encapsulated over the MPS-modified titania core by distillation precipitation polymerization of ethyleneglycol dimethacrylate in neat acetonitrile during the second-stage polymerization via capture of the radicals of EGDMAwith the aid of the reactive vinyl groups on the surface of inorganic core without any stabilizer or surfactant. The shell thickness of the core-shell hybrid microspheres was controlled by the feed of EGDMA monomer during the polymerization. The resultant titania particles and core-shell microspheres were studied by transmission electron microscopy, Fouriertransform infrared spectra, X-ray photoelectron spectroscopy,
and thermogravimetric analysis.