Preparation And Modification Of Phthalocyanine Prepolymer/Fe₃O₄ Hybrid Material

With the advancement of technology,Fe3O4 magnetic hybrid materials have attracted more attention. As a new functional material, they have been applied in stealth technology on thunder and warship, cancer treatment, tower, bridge and magnetic recording materials and so on. Fe3O4 magnetic materials have their own properties such as the excellent absorbing capabilities and low prices. However, large relative density, narrow frequency bands and the poor practical effects have been their inevitable defects. Thus, to retain the advantages and overcome the disadvantages, generally, Fe3O4 magnetic hybrid materials have been made by using other materials with outstanding propertiesDue to the excellent photoconductivity, chemical stability, thermal stability and photosensitivity, copper phthalocyanines have been applied in aerospace industries, organic solar cells, organic semiconductors and so on. Copper phthalocyanines have special phthalocyanine ring structure, which can provide lots of charge carrier and carrier mobilities. Therefore, copper phthalocyanines have been used to prepare functionalized Fe3O4 magnetic materials, to obtain wide frequency band, light weight, thin and strong adsorption capacity Fe3O4 magnetic hybrid materials. The research contents are as follows:(1) Through a simple solvent-thermal route, tri-substituted-bisphthalonitrile(TPH)/Fe3O4 magnetic hybrid materials were synthesized from Fe3O4 and Tri-substituted-bisphthalonitrile. The hybrid materials had good monodispersity and particle diameter of the spherical morphology was uniform. Besides, microwave absorption properties would be dependent on the content of TPH and the reaction temperture.(2) To obtain the superior electromagnetic properties, CuPc/Fe3O4 magnetic hybrid materials were synthesized from Fe3O4 and CuPc. And CuPc was based on tri-substituted-bisphthalonitrile. Besides, the electromagnetic properties of CuPc/Fe3O4 magnetic hybrid materials were relyed on the varying polymerization degree of CuPc. Importantly, the maximum reflection loss value reached to-32.96 dB when the absorber thickness is at 2.5 mm.(3) CNT as dielectric materials has been used widely. However, it has poor magnetic permeability. Thus, to improve the electromagnetic properties, CNT/Fe3O4 magnetic hybrid materials were synthesized through solvent-thermal route. In addition, CNT had been wrapped by copper phthalocyanine to improve the absorb microwave further. It proved that the maximum value of saturation magnetization achieved to 49.34 emu/g and the maximum value of electromagnetic properties achieved to-37.2 dB. Thus, due to the thin thickness and strong microwave absorption capacity, CNT/Fe3O4 magnetic hybrid materials had been important microwave absorbers.