Concurrent genesis of color and electrical conductivity in leathers through in-situ polymerization of aniline for smart product applications

摘要

We present a simple method to produce self-colored and conducting leathers using in-situ polymerization of aniline with ammonium persulfate as oxidant and hydrochloric acid as dopant. The structural and morphological features of treated leathers were examined using Fourier transformed infra-red spectroscopy, X-ray diffraction and scanning electron microscopic analyses. Results suggest the deposition of conducting emeraldine salt form of polyaniline on the leather substrate rather than other poorly conducting states. We also show that the treated leathers are bluish green through reflectance measurements thereby suggesting that the use of toxic and expensive dyes can be avoided for coloration process. Further, we demonstrate that a maximum electrical conductivity of 0.15S/cm is obtained for the leather treated with optimal experimental conditions, which aids its application to operate touch-screen devices. Copyright (c) 2015 John Wiley & Sons, Ltd.