Fabrication of Robust and High Resilient Polythiophene Conductive Polyamides Fibers Based on Tannic Acid Modification

In this work, conductive polyamide fibers were successfully prepared through polymerization of thiophene on the surface of polyamide fibers based on fiber pretreatment and surface activation modification. Sulfuric acid was utilized to roughen the polyamide fibers to increase the activity. Tannic acid (TA) was oxidized and grafted onto the roughened polyamide fibers to convert the inert surface into a highly adhesive tannic acid surface, thus improving the fastness of polythiophene on fiber surface. The effects of treatment temperature, time, and pH were investigated in the preparation process. The surface morphology and chemical structure of the conductive fibers were analyzed by scanning electron microscope (SEM), X-ray photoelectron spectroscopy (XPS), and Fourier transform infrared spectrometry (FTIR). The prepared conductive polyamide fibers have robust electrical conductivity, good strength, thermal stability, resilience, washing fastness, sensing properties, and electrothermal properties, providing potential applications in flexible electronic devices, functional sensors, and infrared assisted therapy.