Abstract:

In order to investigate color response and reversibility of polyaniline-coated silk fabric to pH value, polyaniline-coated silk fabric was prepared by an in-situ chemical polymerization in the presence of ammonium persulfate as the oxidant and dodecyl benzene sulphonic acid as the dopant. The color and color coordinates of polyaniline (PANI)/silk composite fabrics  were measured by the colorumeter. UV-Vis reflecance spectra of fabrics were determined by the integrating sphere. The effect of pH value on the volor of PANI/silk was investigated. It is found that the color of composite textile shows pH-responsive function, its color can change from dark green to blue green, and dark blue when the pH increase from 1 to 14. In addition, PANI/Silk can be reused reversibly in different pH solutions and has a stable switching effect.

Key words: polyaniline, silk, composite fabric, pH-responsive behavior