首页|Synthesis and magnetic properties of water-based Fe_3O_4 ferrofluid
Synthesis and magnetic properties of water-based Fe_3O_4 ferrofluid
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NETL
NSTL
Trans Tech Publications Ltd
Stable water-based Fe_3O_4 ferrofluid was obtained by three steps. Fe_3O_4 nanoparticles with the size of about 10 nm were first prepared by chemical co-deposition method. In order to prevent Fe_3O_4 nanoparticles from agglomerating, they were coated by bilayer surfactants. Then, the coated Fe_3O_4 nanoparticles were dispersed well into water. Due to the actions of electrostatic force and hydrogen bond, the water-based Fe_3O_4 ferrofluids can keep stable for two years and no layered phenomenon occurred. The ferrofluid has high saturation magnetization, low remnant magnetization and coercive force.
NETL
NSTL
Trans Tech Publications Ltd
