Synthesis Of Polyaniline And Its Deriverates Under An External Electric Field

Conducting polymers have attracted considerable attention, not only from academic but from industry as well. Among the family of conducting polymers, polyaniline(PANI) is one of the most widely studied due to its inherent characteristics of unique electronic, simple synthesis process, environmental stability and low cost. Taking into account of the possibility to orient monomeric or ologomeric species under external fields, and thus the highly orientated polymer, herein polyaniline and its derivatives are prepeared under an electric field. The relationship between the structure and properties of the polymers are studied systematically.In this paper, the morphologies, structure, conductivity, doping level and electrochemical properties of CSA doped Polyaniline (PANI) formed by adding NaCl,MgSO4 and AICl3 under the presence and absence of an applied electric field were characterized respectively at first. These results indicate that the property of polyaniline nanofibers prepared under the electric field is superior to the control samples. Specifically, the arrangement of the polymer chains are inclined to be packed in a more order way, as a result, polymers with enhanced electrochemical properties are obtained. In addition, the performance of polyaniline synthesized can be manipulated by addition of different inorganic salts during the synthesis.Subsequently, the morphologies, structure, and electrochemical properties of HCl protoned Polyaniline (PANI) formed with surfactants SDS and CTAB under an applied electric field were also characterized. The results suggested that lots of granular were obtained without surfactants, while nanofibers can be observed with SDS and CTAB, the crystallinity of polyaniline synthesized in the presence of surfactants is better, and therefore the corresponding electrochemical properties.At last, the morphologies and crystalline of poly (p-phenylenediamine) formed by adding NaCl and AICl3 under the presence and absence of an applied electric field were characterized respectively. The results indicated that nanofibers can be observed under different conditions, the arrangement of the poly(p-phenylenediamine) prepared under the presence of electric field is ordered than under the absence of electric field, the crystalline of poly(p-phenylenediamine) prepared by adding AICl3 was better than by adding NaCl.