SYNTHESIS OF POLYANILINE FILM IN THE SOLUTION CONTAINING POLYVINYL ALCOHOL
Corresponding Author(s) : Nguyen Thi Huong
UED Journal of Social Sciences, Humanities and Education,
Vol. 5 No. 2 (2015): UED JOURNAL OF SOCIAL SCIENCES, HUMANITIES AND EDUCATION
Polyaniline film (PANi) was successfully synthesized on mild steel by means of the electrochemical method. This one-step process was conducted in the electrolyte that consists of monomer aniline, oxalic acid, and polyvinyl alcohol (PVA). The mild steel substrate did not need to undergo any special treatment. The PANi/PVA film could precipitate and adhere well on the mild steel. The redox property of film was clearly demonstrated on the cyclic voltammogram. The FTIR analysis showed that PVA has been doped in PANi matrix. Results from the SEM image analysis indicated that the microstructure of the PANi/PVA film was considerably improved thanks to the presence of PVA. The results of the electrochemical measurement pointed out that the corrosion current was decreased to a great extent and the corrosion potential was shifted to the more positive potential (-0.3V). This proved that the PANI/PVA film has brought the steel substrate into a passive state.
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