What is the effect of different silane coupling agents on the magneto-viscous effect of Fe3O4/CNT silicone oil-based magnetic liquids?

Label:chem

Topic
The magneto-viscous effect refers to the change in viscosity of magnetic liquids in response to an external magnetic field. The study explores how different silane coupling agents affect this property in Fe3O4/CNT silicone oil-based magnetic liquids.
Answer
The magneto-viscous effect of Fe3O4/CNT silicone oil-based magnetic liquids is significantly influenced by the type of silane coupling agent used. Fe3O4@570 exhibited the most significant magneto-viscous effect, with a viscosity variation of 161.4%, due to the long-chain structure of the coupling agent enhancing the steric hindrance of the magnetic particles. In contrast, Fe3O4@7030 showed a lower viscosity variation of 28.2%, attributed to the non-polar phenyl group in 7030, which results in weaker particle interactions and a less pronounced magneto-viscous effect.
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