Synthesis and Characterization of Magnetite-Polysulfone Micro- and Nanobeads with Improved Chemical Stability in Acidic Media
Denisa Ficai, Anton Ficai, Roxana Trusca, Bogdan Vasile, Gorgeta Voicu, Cornelia Guran and Ecaterina Andronescu
AbstractThe Fe3O4/polysulfone (PSf) micro and nanobeads with improved chemical stability have been prepared by phase-inversion process starting form magnetite nanoparticles (MNPs) and polysulfone, in dimethylformamide (DMF) 15%w. At the final stage the polysulfone-magnetite suspension was sprayed into distilled water when, the Fe3O4/PSf micro and nanobeads were formed. The polysulfone have double role, named protective role of magnetite in acidic media and support for the immobilization of the active groups involved in water purification. The presence of the polymeric shell induces an accentuate stability of these micro and nanobeads in acidic, synthetic environmental, up to hundredfolds. These Fe3O4/PSf suprastructures were characterized by Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM-HRTEM) as well as chemical stability in acidic, synthetic environmental.
Purchase Online Rights and Permissions