ساخت خازن به ظرفيت پيكوفاراد با استفاده از پلي آنيلين رسانا

Picofarads Capacitance Base on Conducting Polyaniline Films

Polyaniline was synthesized chemically. The purified form of polyaniline was swollen with THF before dispersing in N-methyl pyrrolidonc for film making. The thickness of the films were 80 and 100 micrometers. Polyaniline films were doped with hydrochloric acid at two different concentrations for varied periods of time. The doped films with areas of 1 cm*" were used as conducting plates, and papers were soaked with paraffin as dielectric of conducting polyaniline capacitor. In the present work design, construction of capacitor based on conducting polyaniline films has been investigated experimentally. The results of measurement and calculation of capacitance of the designed capacitor, assuming that diffusion of dopam in polyaniline is plate-like, are reported. Stability under both atmospheric and vacuum conditions were investigated. Experimental results and theoretical studies show that by increasing the doping time, capacitance is increased. Also, the thinner insulating form of pokanilinc film, the faster the two conducting fronts meet and the capacitor reaches a maximum. The value of this maximum in the present work was 42PF.