| 초록 |
A magnetorheological (MR) fluid using a soft magnetic carbonyl iron (CI) generally involves severe dispersion drawbacks because of the substantial density mismatch between the CI particles and continuous medium. To reduce this defect, we fabricated CI/polydopamine (PDA) composite materials via oxidative self-polymerization. While the morphology was observed by scanning electron microscope images, the energy-dispersive X-ray spectroscopy and Fourier transform infrared spectroscopy were performed to confirm the weight and atomic percentage and chemical composition of the CI/PDA composite particles, respectively. The magnetic property was confirmed via vibration sample magnetometer and MR performance was examined using a rotational rheometer under different magnetic field strengths. The sedimentation of the CI/PDA based MR fluid was also measured by a Turbiscan. |
