NANO-Fe3O4/NMMO-CELLULOSE COMPOSITE MEMBRANE PREPARED BY THE IN-SITU CO-PRECIPITATION METHOD

摘要

Using NMMO-cellulose membrane as a matrix, Fe3O4/cellulose composite membrane were prepared by the in-situ co-precipitation method. The effects of Fe2+ and Fe3+ salts concentration on the structure and properties of composite membranes were studied by scanning electron microscopy(SEM), X-ray diffraction(XRD), Fourier transform infrared spectrometer(FTIR) and vibrating sample magnetometer(VSM). Results showed that the spherical magnetic Fe3O4 nanoparticleswere dispersed uniformly and immobilized in the cellulose membranes, and there were good interactions between cellulose and Fe3O4 in the membranes. With increased iron ion content, the thermal stability of Fe3O4-CMgradually increases, and the complex membrane has a second significant weightlessness peak within 620-700 degrees C. In addition, it is also found that Fe3O4/cellulose composite membranes showed good superparamagnetic property.