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M A Quraishi - One of the best experts on this subject based on the ideXlab platform.

  • electrochemical Thermodynamic Surface and theoretical investigation of 2 aminobenzene 1 3 dicarbonitriles as green corrosion inhibitor for aluminum in 0 5 m naoh
    Journal of Molecular Liquids, 2015
    Co-Authors: Chandrabhan Verma, Priyanka Singh, Indra Bahadur, Eno E Ebenso, M A Quraishi
    Abstract:

    Abstract The influence of 2-aminobenzene-1,3-dicarbonitriles derivatives (ABDNs) namely 5′-amino-2,4-dihydroxy-4″-methyl-1,1′:3′,1″-terphenyl-4′,6′-dicarbonitrile (ABDN-1), 5′-amino-2,2″,4-trihydroxy-1,1′:3′,1″-terphenyl-4′,6′-dicarbonitrile (ABDN-2) and 5′-amino-2,3″,4-trihydroxy-1,3-methoxy, 1′:3′,1″-terphenyl-4′,6′-dicarbonitrile (ABDN-3) on aluminum corrosion in 0.5 M NaOH was investigated using chemical and electrochemical methods. Potentiodynamic polarization study reveals that 2-aminobenzene-1,3-dicarbonitriles were mixed type inhibitors. Adsorption of 2-aminobenzene-1,3-dicarbonitriles on aluminum Surface in 0.5 M NaOH follows the Langmuir adsorption isotherm. Adsorption of inhibitors on aluminum Surface was studied using SEM and EDX spectroscopy examinations. Quantum chemical calculations support the weight loss and electrochemical observations.

  • 2 aminobenzene 1 3 dicarbonitriles as green corrosion inhibitor for mild steel in 1 m hcl electrochemical Thermodynamic Surface and quantum chemical investigation
    Journal of The Taiwan Institute of Chemical Engineers, 2015
    Co-Authors: Chandrabhan Verma, M A Quraishi, Ambrish Singh
    Abstract:

    Abstract The three 2-aminobenzene-1,3-dicarbonitriles derivatives (ABDNs) namely 5′-amino-2,4-dihydroxy-4″-methyl-1,1′:3′,1″-terphenyl-4′,6-dicarbonitrile (ABDN-1), 5′-amino-2,2″,4-trihydroxy-1,1′:3′,1″-terphenyl-4′,6′-dicarbonitrile (ABDN-2) and 5′-amino-2,3″,4-trihydroxy-1,3-methoxy,1′:3′,1″-terphenyl-4′,6′-dicarbonitrile (ABDN-3) were synthesized and their corrosion inhibition properties on mild steel in 1 M HCl were investigated using weight loss and electrochemical techniques. Among the compounds investigated, ABDN-3 exhibited the best inhibition efficiency of 97.83% at 100 mg/L. Scanning electron microscopy (SEM) and dispersive X-ray spectroscopy (EDX) examinations was performed on inhibited and uninhibited mild steel samples to show the presence of ABDNs on mild steel Surface. The potentiodynamic polarization studies reveal that all three studied inhibitors were of mixed type and their adsorption on the mild steel Surface in 1 M HCl follows the Langmuir adsorption isotherm. Quantum chemical calculations studied were also performed to support weight loss and electrochemical experimental observations.

Chandrabhan Verma - One of the best experts on this subject based on the ideXlab platform.

  • electrochemical Thermodynamic Surface and theoretical investigation of 2 aminobenzene 1 3 dicarbonitriles as green corrosion inhibitor for aluminum in 0 5 m naoh
    Journal of Molecular Liquids, 2015
    Co-Authors: Chandrabhan Verma, Priyanka Singh, Indra Bahadur, Eno E Ebenso, M A Quraishi
    Abstract:

    Abstract The influence of 2-aminobenzene-1,3-dicarbonitriles derivatives (ABDNs) namely 5′-amino-2,4-dihydroxy-4″-methyl-1,1′:3′,1″-terphenyl-4′,6′-dicarbonitrile (ABDN-1), 5′-amino-2,2″,4-trihydroxy-1,1′:3′,1″-terphenyl-4′,6′-dicarbonitrile (ABDN-2) and 5′-amino-2,3″,4-trihydroxy-1,3-methoxy, 1′:3′,1″-terphenyl-4′,6′-dicarbonitrile (ABDN-3) on aluminum corrosion in 0.5 M NaOH was investigated using chemical and electrochemical methods. Potentiodynamic polarization study reveals that 2-aminobenzene-1,3-dicarbonitriles were mixed type inhibitors. Adsorption of 2-aminobenzene-1,3-dicarbonitriles on aluminum Surface in 0.5 M NaOH follows the Langmuir adsorption isotherm. Adsorption of inhibitors on aluminum Surface was studied using SEM and EDX spectroscopy examinations. Quantum chemical calculations support the weight loss and electrochemical observations.

  • 2 aminobenzene 1 3 dicarbonitriles as green corrosion inhibitor for mild steel in 1 m hcl electrochemical Thermodynamic Surface and quantum chemical investigation
    Journal of The Taiwan Institute of Chemical Engineers, 2015
    Co-Authors: Chandrabhan Verma, M A Quraishi, Ambrish Singh
    Abstract:

    Abstract The three 2-aminobenzene-1,3-dicarbonitriles derivatives (ABDNs) namely 5′-amino-2,4-dihydroxy-4″-methyl-1,1′:3′,1″-terphenyl-4′,6-dicarbonitrile (ABDN-1), 5′-amino-2,2″,4-trihydroxy-1,1′:3′,1″-terphenyl-4′,6′-dicarbonitrile (ABDN-2) and 5′-amino-2,3″,4-trihydroxy-1,3-methoxy,1′:3′,1″-terphenyl-4′,6′-dicarbonitrile (ABDN-3) were synthesized and their corrosion inhibition properties on mild steel in 1 M HCl were investigated using weight loss and electrochemical techniques. Among the compounds investigated, ABDN-3 exhibited the best inhibition efficiency of 97.83% at 100 mg/L. Scanning electron microscopy (SEM) and dispersive X-ray spectroscopy (EDX) examinations was performed on inhibited and uninhibited mild steel samples to show the presence of ABDNs on mild steel Surface. The potentiodynamic polarization studies reveal that all three studied inhibitors were of mixed type and their adsorption on the mild steel Surface in 1 M HCl follows the Langmuir adsorption isotherm. Quantum chemical calculations studied were also performed to support weight loss and electrochemical experimental observations.

Ambrish Singh - One of the best experts on this subject based on the ideXlab platform.

  • 2 aminobenzene 1 3 dicarbonitriles as green corrosion inhibitor for mild steel in 1 m hcl electrochemical Thermodynamic Surface and quantum chemical investigation
    Journal of The Taiwan Institute of Chemical Engineers, 2015
    Co-Authors: Chandrabhan Verma, M A Quraishi, Ambrish Singh
    Abstract:

    Abstract The three 2-aminobenzene-1,3-dicarbonitriles derivatives (ABDNs) namely 5′-amino-2,4-dihydroxy-4″-methyl-1,1′:3′,1″-terphenyl-4′,6-dicarbonitrile (ABDN-1), 5′-amino-2,2″,4-trihydroxy-1,1′:3′,1″-terphenyl-4′,6′-dicarbonitrile (ABDN-2) and 5′-amino-2,3″,4-trihydroxy-1,3-methoxy,1′:3′,1″-terphenyl-4′,6′-dicarbonitrile (ABDN-3) were synthesized and their corrosion inhibition properties on mild steel in 1 M HCl were investigated using weight loss and electrochemical techniques. Among the compounds investigated, ABDN-3 exhibited the best inhibition efficiency of 97.83% at 100 mg/L. Scanning electron microscopy (SEM) and dispersive X-ray spectroscopy (EDX) examinations was performed on inhibited and uninhibited mild steel samples to show the presence of ABDNs on mild steel Surface. The potentiodynamic polarization studies reveal that all three studied inhibitors were of mixed type and their adsorption on the mild steel Surface in 1 M HCl follows the Langmuir adsorption isotherm. Quantum chemical calculations studied were also performed to support weight loss and electrochemical experimental observations.

Pedro Tarazona - One of the best experts on this subject based on the ideXlab platform.

  • capillary waves as eigenmodes of the density correlation at liquid Surfaces
    Journal of Chemical Physics, 2018
    Co-Authors: Jose Hernandezmunoz, E Chacon, Pedro Tarazona
    Abstract:

    We analyze the density correlations in a liquid-vapor Surface to establish a quantitative connection between the Density Functional (DF) formalism, Molecular Dynamic (MD) simulations, and the Capillary Wave (CW) theory. Instead of the integrated structure factor, we identify the CW fluctuations as eigenmodes of the correlation function. The square-gradient DF approximation appears as fully consistent with the use of the Thermodynamic Surface tension to describe the Surface fluctuations for any wavevector because it misses the upper cutoff in the Surface Hamiltonian from the merging of the CW mode with the non-CW band. This mesoscopic cutoff may be accurately predicted from the main peak in the structure factor of the bulk liquid. We explore the difference between the full density-density correlation mode and the bare CW that represents the correlation between the corrugation of the intrinsic Surface and the density at the interfacial region. The non-local decay of the CW effects, predicted from DF analysi...

  • capillary waves as eigenmodes of the density correlation at liquid Surfaces
    Journal of Chemical Physics, 2018
    Co-Authors: Jose Hernandezmunoz, E Chacon, Pedro Tarazona
    Abstract:

    We analyze the density correlations in a liquid-vapor Surface to establish a quantitative connection between the Density Functional (DF) formalism, Molecular Dynamic (MD) simulations, and the Capillary Wave (CW) theory. Instead of the integrated structure factor, we identify the CW fluctuations as eigenmodes of the correlation function. The square-gradient DF approximation appears as fully consistent with the use of the Thermodynamic Surface tension to describe the Surface fluctuations for any wavevector because it misses the upper cutoff in the Surface Hamiltonian from the merging of the CW mode with the non-CW band. This mesoscopic cutoff may be accurately predicted from the main peak in the structure factor of the bulk liquid. We explore the difference between the full density-density correlation mode and the bare CW that represents the correlation between the corrugation of the intrinsic Surface and the density at the interfacial region. The non-local decay of the CW effects, predicted from DF analysis and observed in MD simulations with the intrinsic sampling method, is found to characterize the bare CW fluctuations, which also require a wavevector-dependent Surface tension.

Richard Frydrych - One of the best experts on this subject based on the ideXlab platform.

  • Comparison of Surfaces properties of different types of cotton fibers by inverse gas chromatography
    Journal of Polymer Research, 2009
    Co-Authors: Narjes Rjiba, Michel Nardin, Jeanyves Drean, Richard Frydrych
    Abstract:

    Three types of cotton fibers of different varieties and exhibiting different maturities and wax contents were examined by inverse gas chromatography (IGC), at infinite dilution. In this study, the potential relationships between the microstructure and the Surface properties of different cotton fibers are analyzed. This method is based on the analysis of adsorption of gaseous probes on solid Surfaces. By measuring the retention time of probes into a column containing the fibers, Thermodynamic Surface characteristics of these fibers, in particular the dispersive component of their Surface energy, and their Surface morphological aspects, are determined. The IGC data are correlated with a Surface physico-chemical analysis performed by X-ray photoelectron spectroscopy (XPS) and scanning electron microscopy.

  • a study of the Surface properties of cotton fibers by inverse gas chromatography
    Joint International Conference on Information Sciences, 2007
    Co-Authors: Narjes Rjiba, Michel Nardin, Jeanyves Drean, Richard Frydrych
    Abstract:

    In the present study, the potential relationships between the microstructure and the Surface properties of different cotton fibers are analyzed by inverse gas chromatography (IGC) at infinite dilution. By measuring the retention time of polar and nonpolar gaseous probes into a column containing the fibers, Surface characteristics of these fibers, in particular the dispersive component of their Surface energy and their Surface morphological index, were determined. It is clearly shown that the presence of natural waxes on cotton fibers plays a major role on their Thermodynamic Surface properties, affecting the Surface energy and the acid-base character as well as the morphological aspects of such fibers. Finally, it appeared that IGC is a well appropriate method for the evaluation of the Surface characteristics of cotton fibers.