Abstract
Fe(3)o4 magnetic nanoparticles (MNPs) were prepared by the co-precipitation of Fe(3+) and Fe(2+) using NH(3)center dot H(2)O under microwave irradiation to enhance the crystallization of Fe(3)O(4) MNPs. The MNPs were formed in the aqueous phase, modified by oleic acid and migrated to the organic phase of kerosene to form a magnetic fluid (MF). The core size of MNPs was found to be around 10 nm by TEM. FT-IR results indicated that a covalent bond was formed between the hydroxyl groups on the surface of MNPs and the carboxyl groups of oleic acid. The MF demonstrated good stability, and had susceptibility of 7.78 x 10(-4) and saturation magnetization of 27.3 emu/g. In addition, the mean size of aggregates in MF was 27.51 nm. Finally, the rheological property of the prepared MF was investigated using a rotating rheometer attached with a custom-built solenoid coil. It was found that the MF demonstrated shear-thinning behavior and could be described by the Herschel-Bulkley model. (C) 2008 Elsevier B.V. All rights reserved.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
