Synthesis, Characterization, and Surface Activity of Some Schiff Base Cationic Surfactant Complexes Against Different Microorganisms

Adawy, Ahmed I.; Abbas, Mohamed A.; Zakaria, Khaled

doi:10.1080/10916466.2015.1060500

Cited by 9 publications

(3 citation statements)

References 17 publications

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“…The n value is around 0.86 when DHSiMF and DHSiB are absent. The formation of impurities, roughness, crystalline network flaws, active site size and irregular distribution, and other surface defects have all been connected to surface heterogeneity, which has been shown to be clearly visible at n values smaller than one 44 . The n values show that the presence of these chemicals impaired surface homogeneity because they were present in higher concentrations than those in the corrosive media without inhibitors.…”

Section: Resultsmentioning

confidence: 99%

Synthesis and applications of novel Schiff base derivatives as corrosion inhibitors and additives for improvement of reinforced concrete

Gad,

Abbas,

Bedair

et al. 2023

Sci Rep

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The studied Schiff-base compounds in this work are multitasked investigated as corrosion inhibitors and also, to improve the physical and mechanical properties of reinforced concrete. The efficiency inhibition of the two novel Schiff-base compounds named (DHSiMF) and (DHSiB) for corrosion of carbon-steel in aqueous media of 1 M HCl was assessed via electrochemical methods and loss in weight. FT-IR, 1H-NMR spectra and elemental analysis were used to confirm the structure of such compounds. It was found to have successful inhibition even at low concentrations in tested media, as an increase in inhibitor concentration led to an improvement in the inhibition efficiency. The weight loss results clearly demonstrate that DHSiMF of C-steel in 1 M HCl has a higher inhibition efficiency than DHSiB, with a maximum inhibition efficiency (85%) attained at 1 × 10–2 M from DHSiMF. Electrochemical experiments likewise revealed the same order, but with a maximal inhibitory efficiency of 98.1%. The addition of inhibitors to the corrosive media dramatically changed the anodic Tafel constants (βa) and cathodic Tafel constants (βc), indicating a mixed type nature. Electrochemical polarization curves illustrated the functions of mixed-type inhibition and the action of adsorption matching with the Langmuir adsorption isotherm. The ∆Gads values for DHSiMF and DHSiB at temperatures (ranging from 303 to 333 K) are − 34.42 kilojoule/mole to − 37.51 kilojoule/mole. These values indicate that the compounds’ adsorption types are chemo-physical adsorption. X-ray diffraction (XRD) and Scanning electron microscopy (SEM) experiments were used to check the existence of the protection layer on the surface of carbon steel by analyzing the morphologies of the corrosion effects and the formed chemical compositions of the corrosion outcomes. For the concrete, the findings suggest that the chemical reaction that takes place between the DHSiMF and DHSiB and the concrete mix will result in an increase in the flexural strength, the compressive strength, and the indirect tensile strength of the concrete that is made of the gravel and dolomite aggregate.

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Section: Resultsmentioning

confidence: 99%

Synthesis and applications of novel Schiff base derivatives as corrosion inhibitors and additives for improvement of reinforced concrete

Gad,

Abbas,

Bedair

et al. 2023

Sci Rep

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show abstract

“…The standard adsorption free energy (Δ G ads o ) can be calculated using the mathematical eq . − where R is the universal gas constant, and the value 55.5 represents the theoretical molar concentration of water. The calculated negative Δ G ads values listed in Table showed that the Pz1 and Pz2 adsorptions would be of a spontaneous nature.…”

Section: Resultsmentioning

confidence: 99%

Multifunctional Aspects of the Synthesized Pyrazoline Derivatives for AP1 5L X60 Steel Protection Against MIC and Acidization: Electrochemical, In Silico, and SRB Insights

Abbas

Eid²,

Abdou

et al. 2021

ACS Omega

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The inhibitory impact of low-cost synthesized pyrazoline derivatives named Pz series ( Pz1 and Pz2 ) on the corrosion of API 5L X60 carbon steel in 5 M HCl was inspected to serve as corrosion inhibitors against such a solution for its usage in the oilfield well acidization process. Also, the same compounds were unitized as biocides for sulfate-reducing bacteria (SRBs) to inhibit the microbial-induced corrosion effect. This study was conducted via several electrochemical techniques, namely, electrochemical potentiodynamic polarization (EP) and electrochemical impedance spectroscopy (EIS), in addition to computational density functional theory (DFT). The inhibition efficiency (IE) of Pz series on the corrosion of 5L X60 carbon steel in 5 M HCl was found to increase whenever the Pz series molecule concentration was increased. EP measurements revealed that Pz1 and Pz2 have both cathodic and anodic features (mixed inhibitor) and their corrosion IEs were around 90%. The physicochemical properties of the Pz1 and Pz2 compounds were studied using Langmuir adsorption isotherms, where the equilibrium adsorption data were found to follow it accurately. EIS outputs were found to comply with the values obtained from EP. Scanning electron microscopy was used to examine the topographic anisotropy between the inhibited and uninhibited 5L X60 carbon steel samples to double-check the electrochemical findings. DFT calculations and Monte Carlo simulations were utilized to predict the behavior of inhibitors and to rationalize the experimental results. The serial dilution bioassay technique was used to assess the Pz series as potential biocides to counter the effect of SRBs in compliance with the TM0194-2014-SG standard test method, and the results showed the potency of Pz series in inhibiting such bacterial growth.

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“…In spite of the fact that this is the method of the biocidal potent as a surfactant, the linked zone of the germicidal agent is obscure [45]. Growing the concentration of the biocide leading to more aggregate at varied substrates (aqueous or films of microorganism) [46]. Thus, the more collection of the nonionic surfactants at the film of the cells leading to excess of vigorous act of the molecules toward microorganisms.…”

Section: Maximum Surface Excess (Max)mentioning

confidence: 99%

Enhancement of the Biological activity for Esterified polyethylene glycols by blending them with Sr –Co Nanoferrites

Adawy

Ghoneim

Abdeen

2023

Preprint

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The poly (ethylene glycols) (PEG) were esterified with lauric acid or myristic acid, and their biological activities were improved by blending them with Sr0.25Co0.75Fe2O4 nanoparticles. The Sr0.25Co0.75Fe2O4 nanoparticles were prepared by the chemical co-precipitation method. These prepared polymeric surfactants were investigated using Fourier transformer infrared spectroscopy (FT-IR), Transmission Electron Microscope (TEM) and diffraction of Xray (XRD). Also, the surface tension was characterized at diverse temperatures for these compounds. In addition, the surface parameters as well as concentration of critical micelle (CMC), excess of maximum surface (Γmax), area of minimum surface (Amin), efficiency (Pc20) and effectiveness (πCMC) were measured and computed. It was assessed and assigned the biological activity of these designed surfactants through length of the field of the hindrance against different microorganisms. It was found as of the results, that these compounds have good surface properties and good biological activity by blending these prepared polymeric surfactants with Sr0.25Co0.75Fe2O4 to obtain polymeric surfactants nanocomposites for enhancing their biological activity.

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Synthesis, Characterization, and Surface Activity of Some Schiff Base Cationic Surfactant Complexes Against Different Microorganisms

Cited by 9 publications

References 17 publications

Synthesis and applications of novel Schiff base derivatives as corrosion inhibitors and additives for improvement of reinforced concrete

Synthesis and applications of novel Schiff base derivatives as corrosion inhibitors and additives for improvement of reinforced concrete

Multifunctional Aspects of the Synthesized Pyrazoline Derivatives for AP1 5L X60 Steel Protection Against MIC and Acidization: Electrochemical, In Silico, and SRB Insights

Enhancement of the Biological activity for Esterified polyethylene glycols by blending them with Sr –Co Nanoferrites

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