Synthesis of Hollow Fluorescent Polymer Microspheres with Movable Magnetic Cores
writer：Bin Liu, Xinlin Yang*, and Hongfen Ji
keywords：hollow fluorescent polymermicrospheres;movablemagnetic core; distillation precipitation polymerization
source：期刊
specific source：Polym. Int., 59 (7), 961-966 (2010). DOI: 10.1002/pi.2813
Issue time：2010年
Low-dispersity hollow poly[(ethyleneglycol dimethacrylate)-co-(N-vinylcarbazole)] (P(EGDMA-co-NVCz)) fluorescent microspheres with movable magnetic cores were prepared by quantitative removal of the silica component in hydrofluoric acid aqueous solution from the corresponding magnetite/silica/P(EGDMA-co-NVCz) tri-layer hybrid microspheres. The tri-layer microspheres with magnetic cores and fluorescent polymer shells were synthesized by distillation precipitation copolymerization of ethyleneglycol dimethacrylate crosslinker and N-vinylcarbazole fluorescent monomer in acetonitrile in the presence of 3-(methacryloxy)propyltrimethoxysilane-modified magnetite/silica particles as seeds, which were afforded by a modified Stober sol–gel process, to coat themagnetite cores. The corresponding hollow fluorescent polymer microspheres with movable magnetic coreswere studied using transmission electron microscopy, Fourier transform infrared spectroscopy, vibrating sample
magnetometry, UV-visible spectroscopy and fluorescence spectroscopy.