The perfluoropolyether acyl fluoride was grafted onto the surface of Fe3O4 coated with SiO2 by amidation reaction to obtain a kind of magnetic particles,which can self-disperse in perfluoropolyether oil to form thermodynamical stable perfluoropolyether based magnetic fluid.The structure and properties of the magnetic fluid were characterized by fourier transform infrared spectroscopy,X-ray diffraction,transmission electron microscopy,particle analyzer and vibrating sample magnetometer.And for determining the stability of the magnetic fluid,it was centrifuged in a centrifuge.The results shown that the magnetic fluid with best magnetic property was synthesized at 50℃,with optional molar ratio of Fe2+/Fe3+=1.5∶2,about 1.00mL TEOS was add in and reaction time of 2 hours.Meanwhile it was stable and without stratification,even under the centrifugal condition of 4000rpm.
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基金资助
四川省青年科技创新研究团队项目(2017TD0012);四川理工学院精细化工助剂及表面活性剂四川省高效重点实验室项目(2014JXZ02)
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