Synthesis, Characterization And Properties Research Of Conducting Polyaniline Containing Transition Metal Ions

Conducting polyaniline containing transition metal ions have different functional characteristics compared with the polyanilines doped with conventional protonic acid. In this work conducting polyanilines containing transition metal ions were successfully synthesized by oxidizing the complex of aniline with transition metal ions and characterized by FT-IR, UV/Vis spectroscopy and elemental analysis. The ambient temperature electrical conductivity and thermal stability were investigated. The main research contents were as follows:1. Intrinsic polyaniline and polyaniline hydrochloride were synthesized and characterized by FT-IR and UV/Vis spectroscopy. The scanning electronic micrograph and X-ray diffraction studies were employed to observe the morphology and crystallization patterns of the resulting products. Their thermal stability and electrochemical properties and solubility in common organic solvents were also investigated. These provided some basic data for further study.2. UV/Vis spectroscopy was employed to explore the interaction between the polyaniline molecular chains with transition metal ions such as Cu2+, Fe3+, Co2+, Ni2+. The experimental results demonstrated that the strong complexation/doping interaction existed between the polyaniline chains and transition metal ions.3. Conducting polyanilines containing transition metal ions were synthesized by oxidizing the complex of aniline with transition metal ions. Take the copper salt as an example, the influence of the synthetic conditions such as the molar ratio of reactants, reaction medium, temperature and time on the polymer yield and electrical conductivity was discussed. Meanwhile the corresponding FT-IR spectra were studied. The optimal synthetic conditions have been obtained. The SEM morphology and XRD patterns were observed and compared with intrinsic polyaniline and polyaniline hydrochloric salt as well.Elemental analysis results show that transition metal ions have been successfully incorporated into the polymeric chains.4. The thermal stability of poly anilines containing transition metal ions was studied by TGA in N2 and static air atmosphere, and compared with intrinsic polyaniline and polyaniline hydrochloric salt. The corresponding thermal decomposition information has been obtained. It provided a theoretical basis for these material's application.5. A possible mechanism to explain the resulting conductivity of polyanlines doped with transition metal ions has been proposed based on the experimental results.