Modification of silica nanoparticles with hydrophilic sulfonated polymers by using surface-initiated redox polymerization
作者： Parisa Salarizadeh , Mahdi Abdollahi , Mehran Javanbakht
DOI: 10.1007/S13726-012-0073-7
关键词: Polymerization 、 Chemical engineering 、 Monomer 、 Fourier transform infrared spectroscopy 、 Thermogravimetry 、 Materials science 、 Radical polymerization 、 Polymer chemistry 、 Sulfonic acid 、 Nanoparticle 、 Polymer
摘要: Sulfonated polymer/silica hybrid nanoparticles were prepared by free radical polymerization of 2-acrylamido-2-methyl-1-propane sulfonic acid (PAMPS-g-SN) and styrene sodium salt (PSSA-g-SN), initiated on the surfaces aminopropyl-functionalized silica (ASN). Ce(IV) ammonium nitrate/nitric dodecyl sulfate used as redox initiator stabilizer, respectively. ASN Nanoparticles synthesized a covalently attached 3-aminopropyltriethoxysilane onto surface nanoparticles. monomers (AMPS or SSA) then grafted nanoparticles, ultrasonically dispersed in water, using system at 40 °C. ASN, PAMPS-g-SN PSSA-g-SN characterized Fourier transform infrared (FTIR), thermogravimetry, scanning electron microscopy (SEM) transmission (TEM) analyses. FTIR TGA results indicated that both AMPS SSA successfully The amounts sulfonated polymers estimated from thermograms to be 46 22 % for PAMPS PSSA, From SEM TEM micrographs, average-diameters polymer-grafted measured <50 nm with (semi)spherical morphology, which several able form core PSSA existing around
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