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Information Journal Paper

Title

NEW ASPECTS OF POLYANILINE DOPING: A STUDY BASED ON USING ELECTROCHEMICAL QUARTZ CRYSTAL NANOBALANCE

Pages

  3-12

Abstract

 Oxidative and non-oxidative DOPINGs of POLYANILINE in various acidic media with different concentrations have been studied by ELECTROCHEMICAL QUARTZ CRYSTAL NANOBALANCE technique. POLYANILINE was synthesized electrochemically on the gold electrode of quartz crystal using a galvanostatic electropolymerization method (1 mA/cm2). Electrochemically synthesized POLYANILINE film was exposed to different concentrations of various acidic solutions and the changes in the mass (frequency) of the polymer were recorded. Results showed that the extent and the rate of non-oxidative DOPING depend on the concentration and nature of dopant acid. The rate of DOPING in the case of a number of tested inorganic acids was as the order of: H3PO4<HCl<HClO4<H2SO4. Exposure of doped POLYANILINE to ammonia solution (0.5 M) resulted a mass reduction in the polymer film due to the non-oxidative undoping process. Further experiments showed that this DOPING/undoping behaviour is a completely reversible process. Mass changes of the polymer in oxidative DOPING/undoping process were also recorded. It was also found that at pH values lower than 1, the total mass change during oxidation of the polymer was dependent on acid (or proton) concentration. However, at pH values over 1, the mass change during oxidation was independent of acid (or proton) concentration. These two observations support two different mechanisms of DOPING suggested by other workers.  

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    APA: Copy

    MIRMOHSENI, A., OLADEGARAGOZE, A., & FOTOUHI FAR, F.. (2007). NEW ASPECTS OF POLYANILINE DOPING: A STUDY BASED ON USING ELECTROCHEMICAL QUARTZ CRYSTAL NANOBALANCE . IRANIAN POLYMER JOURNAL (ENGLISH), 16(1 (79)), 3-12. SID. https://sid.ir/paper/537496/en

    Vancouver: Copy

    MIRMOHSENI A., OLADEGARAGOZE A., FOTOUHI FAR F.. NEW ASPECTS OF POLYANILINE DOPING: A STUDY BASED ON USING ELECTROCHEMICAL QUARTZ CRYSTAL NANOBALANCE . IRANIAN POLYMER JOURNAL (ENGLISH)[Internet]. 2007;16(1 (79)):3-12. Available from: https://sid.ir/paper/537496/en

    IEEE: Copy

    A. MIRMOHSENI, A. OLADEGARAGOZE, and F. FOTOUHI FAR, “NEW ASPECTS OF POLYANILINE DOPING: A STUDY BASED ON USING ELECTROCHEMICAL QUARTZ CRYSTAL NANOBALANCE ,” IRANIAN POLYMER JOURNAL (ENGLISH), vol. 16, no. 1 (79), pp. 3–12, 2007, [Online]. Available: https://sid.ir/paper/537496/en

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