MIT-World Peace University (MIT-WPU) is a top educational institute located in Pune, India. It is recognized within&nbsp;UGC under Government of Maharashtra Act No. XXXV 2017.&nbsp;

It is part of the MIT group of institutions (established in 1983) which covers 10+ campuses across India and has more than 50,000+ students enrolled across various disciplines at a given point of time. The institute houses 15 schools ranging from Engineering &amp; Technology, Design, Pharmacy, Commerce, Governance among others. It offers undergraduate, postgraduate and PhD programs among different disciplines.&nbsp;

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MIT World Peace University

School of Chemistry

World University root node

Journal of Materials NanoScience

Conducting polymer and metal-based sensors for the detection of vapours and toxic gases: A concise review

Polyaniline and its nanocomposites have emerged as desirable electrode materials for supercapacitors. However, achieving specific capacitance with long-term cyclic stability is still a challenge. The present study reports on novel hierarchically porous and cross-linked polyaniline synthesized by a method employing aniline (monomer) and phytic acid (dopant acid) in the presence of octyltrimethyl ammonium bromide (OTAB) surfactant. The electrochemical performance of the phytic acid doped sample has been compared with HCl doped samples, the former being superior, i.e., a specific capacitance of 523 and 325 F g-1 at current densities of 0.25 and 10 A g-1, respectively. Additionally, the same possess excellent cycling stability with retention of ~88% of its initial capacitance over 10,000 charge-discharge cycles. Further, the phytic acid doped sample exhibited a lower equivalent series resistance (0.98 Ω cm2) than the HCl doped sample (1.26 Ω cm2). These results reveal the capability of the phytic acid doped hierarchical polyaniline sample as a promising active material for electrochemical applications. © 2020 Elsevier Ltd

Polymer

Interconnected Polyaniline Nanostructures: Enhanced Interface for Better Supercapacitance Retention

J Material Sci Eng

PANI-ZnO nanocomposites embedded polyurethane films for antifouling applications

Eco-friendly antifouling coatings are considered to be superior alternatives over conventional biocidal agents that affect marine life adversely. Considering this fact, polyurethane (PU) films modified with a novel pigment [Polyaniline-Zinc oxide (PANI-ZnO) nanocomposites, 1–2% w/w] and phytic acid as a chelating dopant have been developed. The structure has been elucidated using Infrared Spectroscopy, X-ray diffraction, X-ray photoelectron spectroscopy and the surface properties of the films were explored by using atomic force microscopy, contact angle measurements, and swelling ratios. PANI-ZnO nanocomposite particles conferred excellent chemical, mechanical and thermal properties to the PU films. The antifouling properties of the modified PU films were tested against marine bacteria (Gram negative: Vibrio harveyi and Gram positive: Bacillus licheniformis) both qualitatively and quantitatively (80 to 12% for V. harveyi and 75 to 20% for B. licheniformis). In-vitro studies displayed good antifouling performance of the modified PU-PANI-ZnO films. The present study offers a simple, moreover a passive (green) technology that allows restoration of submerged surfaces with minimal detrimental effect on marine flora and fauna. © 2018 Elsevier B.V.

Chemical Engineering Journal

Polyurethane films modified with polyaniline-zinc oxide nanocomposites for biofouling mitigation

Zinc phosphate (Zn3(PO4)2) nanocrystals were synthesized and used for making conducting polyaniline/nano-zinc phosphate composite by chemical oxidative method. The product was characterized by UV-visible absorption spectroscopy. The crystal structure, morphology and thermal stability of the product were studied by X-ray diffraction, scanning electron microscopy, transmission electron microscopy and thermo gravimetric analysis, respectively. The epoxy-based paint containing conducting polyaniline/nano-zinc phosphate composite pigment was applied on low-carbon steel samples. Corrosion protection performance of the painted low-carbon steel samples in 3.5 mass % sodium chloride solution was evaluated using electrochemical technique. Transmission electron microscopic image revealed the formation of core shell structure of the composite. Composite was found to be more thermally stable than the conducting polyaniline. The corrosion rate of conducting polyaniline/nano-zinc phosphate-painted low-carbon steel was found to be 5.1 × 10-4 mm per year, about 34 times lower than that of unpainted low-carbon steel and 10 times lower than that of epoxy nano-zinc phosphate paint-coated steel. The study reveals the possibility of using conducting polyaniline/nano-zinc phosphate as a pigment for corrosion protection. © Institute of Chemistry, Slovak Academy of Sciences 2016.

Chemical Papers

Conducting polyaniline/nano-zinc phosphate composite as a pigment for corrosion protection of low-carbon steel

Conducting polyaniline nano zinc phosphate composite was prepared by chemical oxidative method. The epoxy based paint containing 2 wt % conducting polyaniline nano zinc phosphate composite pigment was applied on low carbon steel samples. Corrosion protection performance the painted low carbon steel samples in 3.5 wt % sodium chloride solution was evaluated by impedance spectroscopy and alternating immersion testing machine. Conducting polyaniline nano zinc phosphate based paint can protect low carbon steel up to 48 hours in 3.5 wt % NaCl aqueous medium and withstand drying - wetting cycles in the atmosphere. The protection is based on simultaneously operating mechanisms viz. enhanced barrier protection, passivation and release of inhibiting phosphate ions when in contact with corrosive media.

UNIVERSITY POLITEHNICA OF BUCHAREST SCIENTIFIC BULLETIN SERIES B-CHEMISTRY {\ldots}

Evaluation of corrosion protection performance of conducting polyaniline/nano-zinc phosphate coated low carbon steel by impedance spectroscopy

In the present work, a set of polyaniline-graphene oxide (PANI-GO) nanocomposites which exhibit superior properties in terms of shelf life, processability and conductivity due to the synergistic effect of GO and PANI, have been synthesized by varying the concentration of highly non-conducting GO with respect to aniline. The obtained materials were characterized by UV-Vis, FTIR, XRD, Raman, TGA as well as FESEM, TEM analysis. The results reveal that nanocomposites show better dispersibility, crystallinity, thermal stability, and conductivity. Further, the synthesized composites have been tested for their anti-corrosion properties. The potentiodynamic results reveal that PANI nanocomposites with 1% GO exhibited long-term anti-corrosion behavior with a corrosion rate of 6.5 × 10-5 mm year-1, which is much lower than its individual components and commercial-grade red oxide. Also, it possesses highest impedance modulus ∼33 kΩ cm2 and real impedance ∼32 kΩ cm2, maximum coating resistance ∼14.81 × 103 cm2 and minimum coating capacitance after 96 h of immersion in 3.5% mass NaCl than those exhibited by all other coated samples. Higher concentration of GO could not retard the corrosion rate confirming that hydrophilicity of GO play an important role in the redox mechanism of PANI. © 2017 Institute of Chemistry, Slovak Academy of Sciences.

Graphene oxide-modified polyaniline pigment for epoxy based anti-corrosion coatings

The present endeavor focuses on the unusual interactions between polyaniline and graphene oxide (PANi–GO) which radically affects the properties of nanocomposites as it is an emerging material for many potential applications. A series of nanocomposites have been synthesized by varying the weight percentage of highly nonconducting GO with respect to aniline which exhibit superior properties in terms of shelf life, processability and conductivity due to the synergistic effect of GO and PANi. A comparison of the resistances of samples reveal that though as-synthesized GO is insulating (80 MΩ), when added to PANi (283 kΩ) in small amounts yields conducting composites (50–280 Ω). Up to 5 weight % concentration, GO renders conductivity to the composite probably by increasing the doping level of PANi. Nonetheless, no further increase in conductivity observed on addition of more than 5 wt% GO in the composite has dictated us to unravel the structure property relationship between PANi and GO, where GO facilitates the formation of partially reduced phase of PANi, thereby restricting the electronic transport. © 2016 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2016, 54, 3778–3786. © 2016 Wiley Periodicals, Inc.

Journal of Polymer Science Part A: Polymer Chemistry

Polyaniline–graphene oxide nanocomposites: influence of nonconducting graphene oxide on the conductivity and oxidation‐reduction mechanism of polyaniline