DEVELOPMENT OF THE FORCE SENSITIVE RESISTORS USING POLYPYRROLE COATED COTTON WOVEN FABRIC FOR PRESSURE SENSING APPLICATION

Abstract
The cotton twill woven fabric is taken for coating with polypyrrole (PPy) conductive polymer by chemical oxidation method. Monomer, oxidant and dopant used are pyrrole, ferric chloride and Tetra-ethyl ammonium p-toluene-sulfonate at ratio of 4:2:1. Optimized monomer concentration of 0.4M is taken for polymerization process and processing time of 4 hours at 15 ⁰C. After the polymerization, the samples were washed with 2% ethanol and distilled water simultaneously until excess particle removing. The pressure sensing ability of the PPy cotton fabric is measured with change in resistivity by varying weight. The warp direction of the fabric is showing good sensitivity than weft direction. PPy cotton fabric has better sensing ability of pressure compare with standard nonwoven sample.
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Subject(s)
Cotton, Polypyrrole, Chemical oxidation, Resistivity, Woven, Nonwoven
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