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Damage caused by corrosion triggered metallic constructs to be malfunction and collapse, which resulted in financial loss. For this reason corrosion preventing coatings is applied to preserve the worth of industrial assets. Polyaniline (PANI) is one of the members of conducting polymers to use as protective coatings. However, certain co -additives like natural compounds have significantly uplifts the effectiveness of polyaniline (PANI). Herein, the incredible properties of gum rosin (GR) that boost the inhibitory performance of PANI are presented. The PANI patched with GR was synthesized by inverse emulsion polymerization. The UV–Visible and FTIR analysis confirms the synthesis of PANI-gum rosin (PANI-GR) composite, whereas, the thermogram of synthesized composite shows outstanding thermal stability to 533 ° C. SEM analysis reveals a bi-layered morphology with porous PANI layer which is superimposed by fibrous layer of gum rosin. PANI-GR was soluble in numerous common organic solvents, including chloroform, methanol, n-heptane, toluene, DMSO, NMP, and acetone the maximum solubility potential was observed to be 7.8 % (w / v). The corrosion preventing ability of the PANI-GR composite was evaluated through OCP, EIS and Tafel analysis. A significant uplift was found in the OCP potential (E OCP) to −0.38 V which might be due to the existence of a PANI-GR layer with prominent anticorrosive properties. The synthesized PANI-GR composite layer reveals a significant reduction in the corrosion of mild steel surfaces with corrosion efficacy up to 92 % in a diprotic acidic medium. In a nut shell, the potential of PANI-GR composite is demonstrated here in order to resolve problems of PANI, leading to significantly save the country assets. • Ecologically friendly and Novel PANI-GR composite • Superior solubility in common organic solvents • Significant uplift in the OCP potential (E OCP) • Extraordinary corrosion prevention ability up to 92 % [ABSTRACT FROM AUTHOR]

The properties of conducting polymers (CPs) such as polyaniline (PANI) and its derivatives can be modified, improved and even enhanced by making composites with materials which can change the extent and level of doping in the CPs. This paper reports on the synthesis of PANI in the presence of various concentration of polyvinyl alcohol by inverse emulsion polymerization. The as synthesized PANI and PANI/PVA were characterized with UV/VIS, FTIR, XRD, TGA, SEM, conductivity and electrochemical measurements. The results demonstrated the formation of polyaniline doped with polyvinyl alcohol showing high thermal stability and improved room temperature conductivity. The synthesized composites were found to be soluble in common organic solvents such as N-methylpyrolidinone (NMP), Chloroform, 2:1 mixture of toluene and 2-proanol, 1:1 mixture of chloroform and toluene and 2:1 mixture of toluene and methanol. Cyclic voltammetric studies showed good redox properties of synthesized PANI and PANI/PVA. [ABSTRACT FROM AUTHOR]

The current research focused on the super capacitive behavior of organic conducting polymer, i.e., polypyrrole (PPy) and its composites with gum arabic (GA) prepared via inverse emulsion polymerization. The synthesized composites material was analyzed by different analytical techniques, such as UV-visible, FTIR, TGA, XRD, and SEM. The UV-Vis and FTIR spectroscopy clearly show the successful insertion of GA into PPy matrix. The TGA analysis shows high thermal stability for composites than pure PPy. The XRD and SEM analysis show the crystalline and amorphous structures and overall morphology of the composites is more compact and mesoporous as compared to the pure PPy. The electrochemical properties of modified solid state supercapacitors established on pure polypyrrole (PPy), polypyrrole/gum arabic (PPy/GA) based composites were investigated through cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS) and galvanostatic charge–discharge (GCD). The specific capacitance of the PPy modified gold electrode is impressive (~168 F/g). The specific capacitance of PPy/GA 1 electrode has been increased to 368 F/g with a high energy density and power density (~73 Wh/kg), and (~599 W/kg) respectively. [ABSTRACT FROM AUTHOR]

The eco-friendly and cost-efficient synthesis of polyaniline (PANI) is one of the perplexing tasks in the research horizons of conducting polymers while keeping the desired properties unaffected. The present work reports an eco-friendly and comparably cost-efficient pathway for the synthesis of corrosion-resistant, thermally stable, and highly soluble PANI salt using coconut oil as a novel dispersion medium. The PANI salt was optimized by varying the reaction parameters, such as concentration of monomer, oxidant, surfactant, and solvent. The UV/Visible spectra indicated absorption peaks in the range of 344–353, 424–433, and 740–779 nm. The FTIR analysis of PANI salt reveals the stretching of the benzenoid and quinoid rings at 1460 and 1559 nm respectively. X-ray diffraction shows peaks on 2Ө at 19° and 25° which are the characteristic peaks of PANI. PANI salt was found to be soluble in several organic solvents such as 2-propanol, n-Methylpyrolidinone (NMP), and highly soluble in chloroform and Dimethyl sulfoxide (DMSO) up to 7.6 and 6.9% respectively. SEM images and TGA analysis of PANI confirmed the porous morphology like cauliflower and quite thermally stable up to 538 °C respectively. The layer of synthesized PANI shows remarkable corrosion inhibiting behavior on the surface of mild steel which reduces the rate of corrosion up to 82%. Hence, boost up the global economy. [Display omitted] • Eco-Friendly and Comparably Cost efficient coconut oil as novel dispersion medium. • High solubility of the synthesized PANI in chloroform up to 7.6%. • The synthesized PANI salts possess highest thermal stability than the reported literature. • The synthesized PANI salts are excellent anticorrosion material for mild steel. [ABSTRACT FROM AUTHOR]