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| Synthesis, Structure and Properties of Fe3O4 Nanofluids with Liquid–like Behavior |
| TAN Yumo, ZHANG Aibo, ZHENG Yaping, LAN Lan, CHEN Wei |
| Department of Applied Chemistry, School of Natural and Applied Science, Northwestern Polytechnical University, Xian 710072 |
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Cite this article:
TAN Yumo ZHANG Aibo ZHENG Yaping LAN Lan CHEN Wei. Synthesis, Structure and Properties of Fe3O4 Nanofluids with Liquid–like Behavior. Chin J Mater Res, 2011, 25(6): 561-565.
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Abstract Fe3O4 nanoparticles were modified with ionic surfactant (CH3O)3Si(CH2)3N+(CH3)(C10H20)2Cl−, and then the chloridion was replaced by the anion C9H19C6H4(OCH2CH2)20O(CH2)3SO−3 through an ion-exchange process. As a result, an electrical double–layer structure was formed on the surface of Fe3O4 nanoparticles. The results showed that the surface layer has been successfully grafted on Fe3O4 nanoparticles surface and the modified Fe3O4 nanoparticles were well dispersed. The loss shear modulus G'' of Fe3O4 nanofluids was significantly greater than the storage shear modulus G' at room temperature, which confirms the typical fluid-behavior. Great stability and good flowability are well maintained after standing for a year at room temperature.
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Received: 08 August 2011
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| Fund: Supported by National Natural Science Foundation of China No.51073129, Aeronautical Science Foundation of China 2010ZF53060, and NWPU Graduate Student Entrepreneurship Seed Fund Z2011012. |
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