Synthesic and denaturation of magnetic iron oxide nano material for enhance oil recovery

Enhanced oil recovery processes focus on recovering oil trapped in reservoir rocks after primary and secondary recovery state by introducing alien agents into reservoirs. Nanoparticles grafted with polymer onto the surface, known as polymer-coated nanoparticles (PNPs), possess better dispersity and stability compared with nanoparticles. In this research, Fe3O4 magnetic nanoparticles were coated with copolymer (methyl methacrylate) – (2–acrylamide –2–methyl–propanesulfonate) (MMA-co-AMPS) connected via oleic acid bridge, in order to stabilize nanoparticles in salinity and high-temperature environments. Magnetic nanoparticles were synthesized by co-precipitation method. Subsequently, miniemulsion polymerization was carried out to fabricate polymer-coated magnetic nanoparticles. Said material adopted core-shell structure with high dispersity and temperature-stable properties. Structure and morphology of material were characterized by FTIR, DLS, TEM, PXRD, VSM and TGA methods. Obtained nanoparticles with an average size of 16nm and temperature-stable could be utilized in enhanced oil recovery processes.