Technology of Preparing Water-based Magnetic Fluid Dispersing in Polyvinyl Alcohol

Water-based magnetic fluids dispersed with polyvinyl alcohol (PVA) were prepared in PVA solution.The magnetic properties of magnetic fluids were measured by Gouy magnetic balance.The experiments were carried out according to orthogonal test.The results indicated that when other conditions were certain,the order from strong to weak effect in magnetic properties was as follows:the amount of alkali (pH value),the amount of polyvinyl alcohol,the mole ratio of Fe2+ to Fe3+.The betler prepering factor is that pH=1,the centent of PVA is 70% and the ratio of Fe2+ and Fe3+ is 1.2∶2.