Iron oxide/MCM-41 mesoporous nanocomposites and their magnetorheology |
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Authors: | Ying Dan Liu Bong Jun Park Fei Fei Fang Hyoung Jin Choi Wha-Seung Ahn |
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Institution: | 1. Department of Polymer Science and Engineering, Inha University, Incheon, 402-751, South Korea 3. State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao, 066004, China 2. Department of Chemical Engineering, Inha University, Incheon, 402-751, South Korea
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Abstract: | Mesoporous nanocomposite materials of magnetic iron oxide-containing MCM-41 (IO/MCM-41) were prepared by simple thermal oxidation of Fe-containing MCM-41 initially prepared by a direct synthesis route using Fe3+ salt. The magnetic saturation of the fabricated nanocomposite materials was measured using a vibrating sample magnetometer, while surface morphology and inner framework of the composite materials were studied using a field emission scanning electron microscope and a transmission electron microscope to confirm their mesoporous nanocomposite formation. The fabricated magnetic materials were then adopted as a magnetorheological (MR) fluid, where the IO/MCM-41 magnetic nanocomposites were dispersed in a nonmagnetic medium oil in addition to as an additive for carbonyl iron-based MR fluid. Their MR properties of flow curve along with yield stress and viscoelastic properties under applied magnetic fields were investigated using a rotational rheometer. |
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