Electrothermal Feedback in Polypyrrole Coated Cotton Fabric

In this study, polypyrrole (PPy) was coated by chemical oxidation through in-situ polymerization technique. Tetraethyl ammonium p-toluene sulfonate (TEAp-TS) was chosen as a doping agent along with FeCl3 as oxidizing agent. Six different fabric samples were prepared by varying concentrations of monomer, doping agent and oxidizing agent in order to obtain samples with different electrical resistivity. Each sample was exposed to four different temperatures (80, 120, 160 and 200 °C) and electrical resistivity was recorded at different intervals in the range 0-600 seconds. In this way the influence of temperature on electrical resistivity of PPy coated cotton fabric samples was analyzed and found that resistivity decreases with the increase in temperature in two minutes significantly. FT-IR spectrum confirms that there is no change in PPy before and after heating of samples. SEM micrographs showed the deposition of PPy on cotton fibers surface.