Abstract
In the study, two kinds of emulsions were prepared, respectively containing nano water droplets (NWDs) with positive and negative charges on the surface. The positive charges nano water droplets, called Fe-NWDs contained Fe2+ and Fe3+ ions and negative charges nano water droplets, called OH-NWDs, contained OH- ions. After the above two kinds of emulsions were mixed, Fe3O4/PAM superparamagnetic nanoparticles (SMNPs) were synthesized in the integrated NWDs by means of electric interaction, co-precipitation and polymerization reaction. The shapes of Fe3O4/AM SMNPs were spherical or ellipsoid ranged in diameter from 80nm to 360nm tested by TEM and the Fe3O4/AM SMNPs had superparamagnetic character tested by VSM. The magnetic saturation value of Fe3O4/PAM SMNPs was 27.38emu/g. The XRD graph indicated Fe3O4 was contained in the SMNPs. The infrared spectrum proved that Fe3O4 was coated by PAM exactly.
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