Study On Structure And Performance Of Conducting Polyaniline Under High Magnetic Field

The research of conducting polymer has its clear objective to replace the metal as cable, even transit to polymer superconductor in future. But the research in recent 20 years showed that it's unpractical to slather the conducting polymer material as alternative of metal material by existing technological capability. Despite all this, many unique properties are discovered such as optical property, electrical property and magnetic property. The conducting polymer material has perfect foreground such as energy storage device, sensor, molecular lead, photoelectron device, electromagnetic shielding, anticorrosion and invisible technology because the material has properties concurrent in metal and polymer material. But the capabilities and costs limit the further development of conducting polymer, either in theory or in practice.Among a good many members of conducting polymer, polyaniline is at a premium because of its facile raw material, simple synthesis method, unique doping mechanism and perfect environmental stability. Many references reported the study on the synthesis and performance of polyaniline.It is concentrated that the influence on the material by high magnetic field. Although mechanism and extent is ambiguous, the magnetic field has influence on the conducting polymer. The present viewpoints consider that the magnetic field affects the chemical reaction containing radicals and induce orientation of most organic polymer molecules and biological macromolecules due to the magnetic susceptibility anisotropy. The existence of paramagnetic ions can greatly increase the effects of magnetic alignment and improve the properties of a polymer. But the suspicion and debate still exists.The topic utilizes the superconducting high magnetic field system to provide magnetic field to study polyaniline. The performances of polyaniline are studied including molecular structure, electrical conductivity, crystal structure and thermal stability. The structure and performances are compared with the polyaniline without influence of magnetic field. The superconducting high magnetic field provided different magnetic field strength to affect the polyaniline under 1.00T,3.00T,6.00T,9.00T and 12.00T. The results show that high magnetic field has influence on the conductivity and crystallization, and more influence corresponding with higher magnetic field intensity. But the high magnetic field has no obvious influence on the molecular structure and thermal stability.