The doping process of polyaniline (PANI) was investigated in a thermal (80°C) solution of poly(styrene sulfonic acid) (PSS). The in situ UV-vis spectra indicated that the doping process at 80°C was completed in 1200s, which is much faster than that at 25°C. Through a kinetic study, the diffusion coefficient of PSS at 80°C was estimated as 0.37×10-16cm2s-1, which is 132-fold higher than that at 25°C (0.28×10-18cm2s-1). The specific characteristics of PANI doped with PSS (PANI-PSS) were checked using X-ray photoelectron spectroscopy (XPS), Auger electron spectroscopy (AES), cyclic voltammetry (CV), and in situ UV-vis absorption spectroscopy. It was found that the low diffusion rate of PSS at 25°C prevented the release of anions from PANI-PSS even under a negative applied potential. The electrochemical measurements showed that the charge transfer rate and electroactivity of PANI-PSS were much higher than those of PANI-H2SO4 in a neutral solution.
|Number of pages||6|
|Journal||Journal of the Taiwan Institute of Chemical Engineers|
|Publication status||Published - 2011 Mar 1|
All Science Journal Classification (ASJC) codes
- Chemical Engineering(all)