Electrochemical polymerization of aniline from an oxalic acid medium

Synthesis of Poly (2,5-dimethoxyaniline) and Electrochromic Properties

“…The use of dibasic oxalic acid rather than mineral acids such as HCl and H 2 SO 4 showed higher adhesion of polyaniline on substrate 35,37 . The polymers were deposited on the ITO glass electrode by scanning the potentials between -0.5 to +0.5 eV versus Ag/AgCl reference electrode.…”

“…Poly(2,5-dimethoxyaniline) (PDMA) film was deposited on the ITO (indium tin oxide) coated glass by the potentiostatically electrochemical polymerization of DMA at room temperature according to the published procedure [34][35][36] . Prior to each experiment, the ITO coated glass electrode was cleaned with acetone and distilled water.…”

“…The response time for coloration of PDMA under H 2 SO 4 is faster than that of oxalic acid 30 . However, using oxalic acid as an electrolyte for the synthesis of PDMA brings about higher adhesion of film on substrate than using H 2 SO 4 as the electrolyte 35,37 . In summary, the PDMA film can be switched successfully from yellow to blue and blue to yellow through applying negative and positive potentials via the redox switching.…”

Corrosion of polyaniline-coated steel in high pH electrolytes

“…Sample analysis was done within 2 h after preparing the films. [16]. The large polygonal crystals seen in Fig.…”

The Formation of Passive Layers on Zinc Based Platings

“…This phase leads to the formation of a passive layer on the electrode surface. 34 Passivation of especially carbon steel and iron prior to electropolymerization is very important in synthesizing homogenous and adherent polymer films. On the other hand, polymerization rate and polymer structure depend strongly on the anion type in the supporting electrolyte due to a different degree of specific adsorption of anions on mild and stainless steel.…”