| 초록 |
This study introduces a nanoparticles-stabilized Pickering emulsion system that fabricated by interfacial assembly of associative magnetic nanoparticles (AMNPs). AMNPs are synthesized by chemical grafting of hydrophobically modified poly(2-methacryroyloxyethylphosphorylcholine-co-stearyl methacrylate) (poly(MPC-co-SMA)), in which the surface-mediated seeded living radical polymerization is employed. The hydrophobicity is tuned by the copolymeriation ratio of SMA against MPC. The thickness of polymer layers ranges in a few nanometers. The studies on suspension rheology for the AMNPs show that there are competition between the hydrophobic attraction and the electrostatic and steric stabilization. Also, when the Pickering emulsion is produced using the AMNPs, the flow behavior can be successfully controlled in response to applied magnetic fielld, which nicely demonstrates that this system has great potentials for recoverable emulsion flooding applications. |
