Abstract:

Polypyrrole, a π-conjugated conducting polymer with specific photoelectric properties, has been systematically introduced into the curricula of many colleges. Its preparation has been used to illustrate comprehensive experiments, integrating knowledge from multiple disciplines such as chemistry, physics, and material science. The Electrochemical Preparation Experiment of Polypyrrole developed by our university was successfully advanced from a simple preparation task into a comprehensive open experiment. First, electrochemical polymerization was carried out under the three-electrode system and the polymerization conditions were explored. Thereafter, a cyclic voltammetry test was conducted to study the electrochromism of polypyrrole. Finally, the conductivity of the products, obtained under different conditions, was characterized and analyzed. The enhanced content of this new experiment design will help students improve their comprehensive skills and cultivate their scientific thinking, which conforms with current developments in modern chemistry education.

Key words: Polypyrrole, Electrochemical polymerization, Electrochromism, Three-electrode system, Open experiment