Study on Preparation and Characterization of Magnetic Paper with Bleached Chemical Pulp

Magnetic nano-composites fibers were prepared by in-situ synthesis method. The loading degree of magnetic particles (Fe₃O₄) depends on Fe²⁺ concentration, amount of PEI, reaction temperature, aging time and stirring speed. The structure and properties of magnetic paper were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD) and vibrating sample magnetometer (VSM). The results indicated that the optimal reaction conditions were as follows: Fe²⁺ concentration 0.06 mol/L, the amount of PEI 2%, reaction temperature 60degC, aging time 60 min and stirring speed 1000 r/min. SEM micrograph shows that magnetic particles are in nanometer size and distribute uniformly on the surface of magnetic paper. XRD confirms that the magnetic particles are Fe₃O₄. VSM results show that the magnetic paper has super-paramagnetic behavior.