Preparation and characterization of flake-like polypyrrole/SrFe12O19 composites with different surface active agents

Flake-like polypyrrole/SrFe12O19 composites were synthesized by in situ polymerization method. The samples were characterized by SEM, XRD and IR technology. Flocs-like SrFe12O19 was synthesized by sol–gel method using the absorbent cotton as template for the first time. A possible mechanism for the formation of flocs-like SrFe12O19 had been proposed. Then the flocs-like SrFe12O19 was used as template for the preparation of polypyrrole/SrFe12O19 composites. Two kinds of surface active agents were used for the surface treatment of the flocs-like SrFe12O19. It was found that the comprehensive magnetic property for the flocs-like SrFe12O19 was superior to the sphericity-like SrFe12O19 for the excellent magnetic aeolotropism of the flocs-like SrFe12O19. The coercivity (Hc) for the flake polypyrrole/SrFe12O19 composites was far greater than the pure flocs-like SrFe12O19. The effect of the surface active agents on the morphology and properties of flake-like polypyrrole/SrFe12O19 composites was studied in the text.