| 초록 |
Magnetic hydrogels are a new class of soft polymer materials with their properties controlled by magnetic fields. Their hydrogels are called ferrogel. Recently, ferrogels are studied sensor, actuator and drug delivery system. In this study, magnetite nanoparticles were synthesized using Fe(Ⅱ) and Fe(Ⅲ) salt chemical coprecipitation with potassium hydroxide(KOH) in an aqueous solution. And ferrogels are prepared poly(acrylic acid). while ferrogels are used to sensor and actuator, it is swollen in long term. In this situation, Poly(acrylic acid) ferrogels are unstable. Magnetites are migrated. The properties of pure nanometer-size magnetite particles were characterized by X-ray diffraction. Nanoparticles size range were measured zeta potential. Migration is measured SEM and automatic sequential X-ray spectrometer on the state of thin slice. |
