How do different silane coupling agents affect the shear-thinning behavior of Fe3O4/CNT silicone oil-based magnetic liquids?

Label:chem

Topic
Shear-thinning behavior refers to the decrease in viscosity of a fluid with increasing shear rate. The study investigates how different silane coupling agents influence this non-Newtonian behavior in Fe3O4/CNT silicone oil-based magnetic liquids.
Answer
Different silane coupling agents significantly affect the shear-thinning behavior of Fe3O4/CNT silicone oil-based magnetic liquids. Fe3O4@550, with its strongly polar amino groups, forms a dense coating layer that results in uniformly dispersed particles and strong interactions, leading to a high initial viscosity peak and a significant decrease in viscosity with increasing shear rate. Fe3O4@570, with its long methacrylate chains, forms "soft connections" between particles, resulting in a high initial viscosity that decreases rapidly with shear rate. Fe3O4@7030, with its non-polar phenyl groups, forms a loose coating layer and weak particle interactions, leading to a low initial viscosity peak and a gradual decrease in viscosity with increasing shear rate.
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