Electromagnetic and Electrical Properties of Coated Cotton Fabric with Barium Ferrite Doped Polyaniline Film

In this study, we aimed to produce fabrics with microwave absorbing properties in broad band. For this purpose, the cotton fabrics were coated with polyaniline (PAni) by using chemical oxidative polymerization method. Firstly, the type of protonic acid used, the polymerization time, the type and concentration of dopant, and the number of coating layer were varied as parameters. The effect of these parameters on resistance values of coated fabrics was investigated. We determined the most appropriate process conditions to provide the lowest resistance values. Secondly, the fabric was coated with PAni by adding, barium ferrite powder as filler with different ratios. Morphological properties, electrical, and electron magnetic properties of coated fabrics were determined. As a result, we obtained 350 Q of the minimum resistance values of coated fabric using 1M HCL, 0.5M aniline and 0.5M ammonium persulphate by chemical oxidative polymerization method for totally 4 h of polymerization time. The results of electromagnetic parameters showed that the absorption values of the fabric coated PAni was average 48% in the frequency range of 6-14 GHz. It Was Concluded that microwave absorber for a textile material can be successfully produced by this process. (C) 2009 Wiley Periodicals, Inc. J Appl Polym Sci 113: 358-366, 2009