Effect of Coated Polypyrrole Content on the Properties of Polypyrrole Coated Fabrics

Abstract

To chemically prepare polypyrrole(pPy) coated fabrics(silk, cotton and nylon fabrics), the fabrics were first soaked in 0.4M oxidant FeCl3/0.06M dopant anthraquinone-2-sulfonic acid solution for 5min at room temperature, and subsequently soaked in a 0.4M monomer pyrrole aqueous solution for 5min at room temperature. The content(wt%) of coated pPy in the coated fabrics was controlled by the number of treatments(these two steps). This study examined the effect of the number of treatments/pPy content on the sheet resistance, mechanical/bending properties and color behaviors of pPy coated fabrics. The coated pPy content, sheet resistance(Ω/square) and color strength(K/S) of pPy coated fabrics increased sharply with increasing number of treatments up to 20 times, while the increase slowed down afterward. The tensile strength, elongation at break and lightness(L*) decreased with increasing number of treatments. The tensile modulus and bending rigidity of coated fabrics increased significantly with increasing number of treatments/coated pPy content. This indicated that the flexibility of coated fabrics decreased considerably.

Conductivity, superhydrophobicity and mechanical properties of cotton fabric treated with polypyrrole by in-situ polymerization using the binary oxidants ammonium Peroxodisulfate and ferric chloride

“…Furthermore, the polypyrrole used in this study is known as a rigid substance with conjugated double bond structures. 56 Therefore, the polypyrrole particles formed through the pyrrole polymerization can be estimated to disperse even into inside the fabrics, form rigid conductive layers and restrict the movement of the threads, making the fabrics stiff. As a consequence, A100 and F100, whose thicknesses increased by more than 10% because of the large polypyrrole deposition amounts, exhibited stiffer and more rigid appearances because of deposition and coating.…”