Preparation, structure and electrochromic behavior of PANI/PVA composite electrospun nanofiber

Abstract

In this study, the preparation of polyaniline/polyvinyl alcohol (PANI/PVA) emulsion and the fabrication of PANI/PVA nanocomposite and electrochromic device are presented systematically. The surface morphologies, chemical structural and mechanical properties of the PANI/PVA nanofibers were characterized using scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR) and instrumental equipment. Four PANI/PVA composites with different PANI concentrations (i.e. 0 wt%, 0.2 wt%, 0.4 wt%, 0.6 wt%) were prepared to investigate the effects of PANI content on the electrochemical properties of the composites. Electrochromic properties of these PANI/PVA electrospun composite nanofibers are systematically characterized by an electrochemical workstation. Cyclic voltammetry was conducted to measure the electrochemical behavior of the PANI/PVA electrospun composite nanofibers at scanning speeds of 5 mV/s, 20 mV/s, 50 mV/s and 100 mV/s; it could be found that the redox peaks almost disappear. The discoloration of PANI/PVA composite electrospun nanofiber presents the color changing among the three mainstream colors of green, yellow, and blue.

Polyaniline/polyvinylpyrrolidone nanofibers via nozzle‐free electrospinning

“…For the PANI‐ES/PVP solution, with increasing PANI‐ES content, the system electrical conductivity substantially increased, as mentioned in Table 1. The PANI‐ES may affect the solution's electrical and viscoelastic properties by increasing its concentration in the solution 50 . The higher charge density and ionic conductivity can enhance the jet instability and higher splitting degree, making the overall electrospinning process challenging to control 50 .…”

“…The PANI‐ES may affect the solution's electrical and viscoelastic properties by increasing its concentration in the solution 50 . The higher charge density and ionic conductivity can enhance the jet instability and higher splitting degree, making the overall electrospinning process challenging to control 50 . The potential difference of the applied voltage was adjusted from 40 kV to 60 kV during the electrospinning process to avoid the PANI‐ES/PVP solutions electrospraying.…”

“…49 Doped PANI usage in polymer blend solutions has been reported extensively in the literature. 8,14,21,26,35,37,42,46,[50][51][52][53] Much of the current literature presents varying results on the electrospun materials' enhanced electrical conductivity based on the doped PANI. There are several disadvantages associated with the use of doped PANI as compared to using pure PANI.…”

Electrospun Conducting Polymers: Approaches and Applications

“…Electrospun CP-based nanofibers have been observed to undergo color changes on the basis of their oxidation state with the uniformity, alignment, and compactness of the device. These factors have been observed to affect not only the distribution of color but also the mechanical properties of the resultant material [238]. These have potential applications in the fields of smart textiles.…”

Influence of used polyvinyl alcohol grade on the electrochromic properties of Ni(OH)2-PVA composite films

“…At the same time, PVA has found its application in the elements of electrochromic devices. Recently, researchers have proposed a method for forming a nanocomposite material based on polyaniline and polyvinyl alcohol for an electrochromic device [21]. In turn, the work [22] proposed the formation of a solid polymer electrolyte for an electrochromic device based on WO 3 .…”