Abstract
Abstract Electrical and thermal conductivity of wool fabric is modified with applying polypyrrole on its surface by in-situ chemical polymerization in aqueous media using FeCl 3 oxidant and p-toluene sulphonic acid dopant. Effects of various process parameters of in-situ polymerization viz. pyrrole concentration, FeCl 3 concentration and polymerization time on thermal conductivity of the coated textiles have been reported. A significant improvement of electrical and thermal conductivity is observed when wool fabrics are coated with the polypyrrole. Thermal conductivity of wool fabric can be increased from 0.0312 Wm −1 K −1 to 1.60 Wm −1 K −1 after polypyrrole coating. PPy add-on and average surface resistivity of this sample is found to be 8.12% and 1.337 kΩ/ϒ, respectively. SEM images reveal quiet uniform coating of polypyrrole on individual wool fibres. FTIR studies depict significant chemical interaction between wool fibre and polypyrrole. DSC results reveal that thermal stability of wool fibre has been enhanced by PPy coating.
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