Study on preparation of high magnetic saturation strength magnetic fluid by multi-point affinity polymerization modification
Magnetic nanoparticles of Fe3O4 were prepared by using organic iron as raw material,organic alkali as reactant,and N-methylpyrrolidin-2-one as reaction solvent,and the magnetic powder was modified with a copolymer.Thus,under high magnetic particle content conditions,the magnetic powder could still form a magnetic fluid system uniformly and stably with the decane homopolymer based carrier liquid.The magnetic powder was characterized and analyzed by vibrating sample magnetometer,transmission electron microscope,laser particle size analyzer,zeta potentiometer,infrared spectrometer,etc.and the stability of decane homopolymer based magnetic fluid.It was found that the magnetic fluid was analyzed prepared by the surface copolymer modified magnetic powder did not undergo magnetic-liquid separation after 1400 hours,and the magnetic saturation strength was over 700GS.
magnetic fluiddecane homopolymermultipoint affinity polymerization modificationhith magnetic saturation
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