Comparison of the growth process and electrochemical properties of polyaniline films prepared by pulse potentiostatic and potentiostatic method on titanium electrode

Abstract

Polyaniline (PANI) films were deposited on titanium (Ti) electrode in a bath containing 0.3 mol L À1 aniline and 1 mol L À1 HNO 3 by pulse potentiostatic method (PPM) and potentiostatic method (PM). The chronoamperograms during aniline polymerization were recorded, and the morphologies of PANI films prepared with different polymerization periods were examined under scanning electron microscope. The difference between the processes of PANI films growth was studied. The growth processes of PANI films prepared by PPM and PM are divided into two stages. For both PPM and PM, the first stage corresponds to the formation of a compact granular PANI layer on the surface of Ti electrode. The second stage corresponds to further growth of PANI film on the surface of the compact granular PANI film. However, the PANI films prepared by PPM and PM show different morphologies in this stage. In addition, the electrochemical properties of the PANI films prepared by PPM and PM are obviously different.

Growth Processes and Morphological Evolution of Polyaniline Film During Potentiostatic Growth

“…, potentiodynamic vs. potentiostatic and potentiodynamic vs. galvanostatic modes . There have been several studies conducted on the electrochemical growth processes of PAni . However, few systematic studies have been conducted on the growth processes and morphological evolution of PAni films during potentiostatic growth .…”

“…One of the most important points in the electrochemical studies of conducting polymers is the understanding of nucleation/growth processes. Studies of electrochemical growth processes have been performed employing three different methods: potentiostatic (constant potential), galvanostatic (constant current), and potentiodynamic (cyclic voltammetry) . Our research group has conducted comparative studies of the effects of electrodeposition methods on the electrochemical and morphological properties of PAni films, e.g.…”

3D Printing of Polycaprolactone–Polyaniline Electroactive Scaffolds for Bone Tissue Engineering

“…Further characterisation using XRD shows that the sample consists of two broad peaks at 2θ = 15 • and 20 • representing the amorphous phase and a sharp peak at 25 • representing the crystalline phase of PANI (Figure 2b). These peaks are characteristic of PANI in the conductive form (emeraldine salt) and demonstrating the successful synthesis of the polymer [61,62]. The mechanical ball-milling process reduced the PANI particle size and produced a more uniform particle size distribution (Figure 2c and Table 1).…”

One-dimensional growth and electrochemical properties of polyaniline deposited by a pulse potentiostatic method

“…A modified potentiostatic method, pulse potentiostatic polymerization, is also used to access more available operational parameters. The influences of the pulse potentiostatic parameters on growth and electroactivities of PANI have been discussed [13][14][15][16][17]. Nanofibrous PANI was obtained on titanium by the Kuang group, and their results were attributed to discontinuous polymerization [16,17].…”