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Study on Structure and Performance of Conducting Polyaniline under High Magnetic Field

Author: SongXiangZuo
Tutor: NiuDun
School: Northeastern University
Course: Applied Chemistry
Keywords: Strong magnetic field Polyaniline Crystallization Conductivity Thermal stability
CLC: O632
Type: Master's thesis
Year: 2008
Downloads: 52
Quote: 0
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Abstract


Conductive polymer as the material, from the beginning of the purpose is very clear, is expected conductive polymer materials in the future instead of the metal as a cable to use, and even the development of polymer superconductors. But in the nearly 20 years of research process, people come to realize the extensive use of such materials as metal substitutes at least not realistic to the existing technology in terms of capacity. Nevertheless, made extensive and in-depth study of their physical and chemical properties, it was discovered that they have many unique optical, electrical and magnetic properties. It is they both metals and other characteristics of the polymer materials, making it technically has a wide range of attractive application prospects in the energy, optoelectronic devices, sensors, molecular wires and molecular devices, as well as electromagnetic shielding, metal anti-corrosion and stealth . Many other members of the conductive polymer, polyaniline is easy to get because of their raw materials, synthetic unique mechanism of doping, good environmental stability and a wide range of potential uses of the growing attention and become the fastest-growing research progress conductive high molecular materials. Both at home and abroad, are many reported the synthesis, the nature of the study and application of polyaniline. The role of the strong magnetic field of polymer materials has long been a concern so far are not clear, but the extent and mechanism of the strong magnetic polymer materials. Currently considered a strong magnetic field may affect the free radical activity occurred during the polymerization reaction, or an organic polymer and a bio-polymer chain orientation changes. Article on the basis of the solution method by chemical oxidation Polyaniline superconducting strong magnetic field system, respectively, of polyaniline plus 1.00T 3.00T 6.00T, 9.00T and a 12.00T five different strength of the magnetic field, observed conductive The properties, thermal stability, crystal structure and the magnetic field strength of the relationship, and made a comparative analysis of the performance of the sample with no applied magnetic field. The results show that the strong magnetic field has no effect on the molecular structure and thermal stability of the polyaniline basic influence on the crystal structure and the conductive properties, and the greater the magnetic field strength, the role of the more obvious. May be because the irradiation of the strong magnetic field after the polymerization, the molecular structure and thermal stability were not found significant changes. Crystallization of the polyaniline molecules can be changed but the role of the strong magnetic field, this change may affect conductivity main reason. Moreover, the relationship between this change and the magnetic field strength and nonlinearity.

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CLC: > Mathematical sciences and chemical > Chemistry > Polymer chemistry ( polymer ) > Carbon - chain polymers
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