Abstract
A new method for synthesizing magnetically responsive Fe3O4@UA@AA nanoparticles have been reported in this paper. The superparamagnetic Fe3O4@UA nanoparticles were prepared via carboxyl-functionalization of 10-undecenoic acid and Fe3O4@UA@AA made by a polymerization of 10-undecenoic acid on the surface of nanoparticles with acrylic acid. Thus the magnetic nanoparticles were functionalized with carboxylic groups. The compositions of as-prepared nanoparticles were characterized by FTIR, TGA, TEM, VSM and conductivity titration. Under optimized experimental conditions, Fe3O4@UA@AA nanoparticles with diameter of about 20 nm and 0.437mmol/g of carboxyl groups and 65 emu/g of saturation magnetization were prepared successfully.
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