Benzothiazol-3-ium Cationic Schiff Base Surfactants: Synthesis, Surface Activity and Antimicrobial Applications against Pathogenic and Sulfur Reducing Bacteria in Oil Fields

Negm, Nabel A.; Elkholy, Yehya M.; Ghuiba, F.M.; Zahran, M. K.; Mahmoud, Soad A.; Tawfik, Salah M.

doi:10.1080/01932691003756902

Cited by 33 publications

(34 citation statements)

References 21 publications

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“…The adsorption of the inhibitor molecules on the carbon steel surface decreases the interaction between the metal surface and the corrosive ions increases the inhibition efficiency. Comparing the results of inhibition efficiency at 400 ppm by weight after 1 h in Table 1 revealed that ethoxylated compound with a low number of ethylene oxide units (VE15) had an inhibition efficiency of 84.65 %, while the introduction of more ethylene units into the molecule increased the efficiency of the produced inhibitor (VE60) to 88.22 % after 1 h. That effect is reasonable due to the increased oxygen heteroatom extent in the inhibitor molecules, which increases the electron density on the inhibitor molecules and, consequently, the adsorption tendency increases on the metal surface [44,45].…”

Section: Effect Of Inhibitor Concentration On Corrosion Of Carbon Steelmentioning

confidence: 93%

Vanillin-derived non-ionic surfactants as green corrosion inhibitors for carbon steel in acidic environments

Tawfik

Negm

2015

Res Chem Intermed

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Four eco-friendly ('green') non-ionic surface active agents were synthesized via reaction of fatty acids obtained from hydrolysis of castor oil with vanillin. The products were then reacted with monoethanol amine to form a vanillin ester Schiff base. The vanillin ester Schiff base was ethoxylated using ethylene oxide gas in the presence of tri-ethyl amine as a catalyst to give the desired nonionic surfactants. The chemical structures of the obtained surfactants were characterized using FTIR and 1 HNMR spectroscopy. The inhibition effect of the four synthesized non-ionic surfactants derived from vanillin (VE15, VE20, VE40, and VE60) on the corrosion of carbon steel in acidic media of 0.5-M HCl was studied by weight loss, potentiodynamic and electrochemical impedance spectroscopy measurements. The results show that the synthesized inhibitors are effective inhibitors even at very low concentrations, and the adsorption on carbon steel surface obeys the Langmuir adsorption isotherm. Potentiodynamic polarization curves reveal that the synthesized inhibitors behave as mixed-type inhibitors. Adsorption of used inhibitors led to a reduction in the double layer capacitance and an increase in the charge transfer resistance. Calculated DG ads o values indicated that the mechanism by which these inhibitors adsorb onto carbon steel in 0.5-M HCl solution is chemical adsorption. The surface activities of the synthesized surfactants were determined using surface tension measurements. The biodegradability of these surfactants indicates that the compounds readily degrade in the environment and can be considered as green corrosion inhibitors.

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Section: Effect Of Inhibitor Concentration On Corrosion Of Carbon Steelmentioning

confidence: 93%

Vanillin-derived non-ionic surfactants as green corrosion inhibitors for carbon steel in acidic environments

Tawfik

Negm

2015

Res Chem Intermed

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“…The products were filtered off and recrystallized twice from ethanol to obtain the crystalline products of the desired metal complexes (C12QSn, C12QZn, C12QCo, C16QSn, C16QZn, and C16QCo) [37,38] (Scheme 1). [39,40].…”

Section: Synthesis Of Cationic Surfactants Metal Complexesmentioning

confidence: 97%

Synthesis, characterization and antimicrobial activity of N,N-bis(hydroxymethyl)-N-[(2-mercaptoacetoxy)methyl]alkyl ammonium bromide surfactant and their Co(II), Zn(II) and Sn(II) complexes

Tawfik

Zaky

2014

Res Chem Intermed

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Two-membered cationic surfactants namely: N,N-bis(hydroxymethyl)-N-[(2-mercaptoacetoxy)methyl)dodecane ammonium bromide (C12Q) and N,Nbis(hydroxymethyl)-N-[(2-mercaptoacetoxy)methyl]hexadecane ammonium bromide (C16Q) and their cobalt, tin and zinc complexes (C12QCo, C12QSn, C12QZn, C16QCo, C16QSn and C16QZn) were synthesized. The chemical structures of the synthesized compounds were confirmed using different spectroscopy tools. The surface activities of the synthesized surfactants were influenced by their chemical structures and the type of the transition metals. The synthesized cationic surfactants and their metal complexes were evaluated as biocides against Gram-positive bacteria (Bacillus subtilis and Micrococcus luteus), Gram-negative bacteria (Bordetella pertussis and Escherichia coli) and fungi (Candida albicans and Aspergillus niger), while the sulfate-reducing bacteria were tested against Desulfomonas pigra. The biological activity results showed that the cationic surfactants exhibit moderate to high efficiency against the tested microorganisms. The antimicrobial activity was strongly increased by complexation of these cationic surfactants with Co(II), Sn(II) and Zn(II) ions. The antimicrobial activity of the synthesized compounds against sulfate-reducing bacteria showed promising results in the field of biocides application.

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“…Because of this repulsion, the hydrophobic chains are directed to the metal/water interface and form a well ordered layer. Hence, the repulsion force between the chains and the aggressive medium will increase by increasing the number of methylene groups [62].…”

Section: Mechanism Of Inhibitionmentioning

confidence: 99%

Three gemini cationic surfactants as biodegradable corrosion inhibitors for carbon steel in HCl solution

2015

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Three gemini cationic surfactants with different hydrophobic spacer chain lengths were synthesized and characterized. The inhibition effect of N,on the corrosion of carbon steel in 1.0 M HCl solution at 25-60°C was studied by weight loss, potentiodynamic polarization, and electrochemical impedance spectroscopy. The results show that the synthesized inhibitors are effective inhibitors even at very low concentration, and the adsorption on the carbon steel surface obeys the Langmuir adsorption isotherm. Potentiodynamic polarization curves reveal that the synthesized inhibitors behave as a mixed-type inhibitor. Adsorption of used inhibitors led to a reduction in the double layer capacitance and an increase in the charge transfer resistance. Thermodynamic parameters have been obtained by adsorption theory. Surface activity and corrosion inhibition relationship were discussed. The biodegradability of the synthesized surfactants showed their readily biodegradation in the open environment and were considered as environmentally friendly corrosion inhibitors.

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Benzothiazol-3-ium Cationic Schiff Base Surfactants: Synthesis, Surface Activity and Antimicrobial Applications against Pathogenic and Sulfur Reducing Bacteria in Oil Fields

Cited by 33 publications

References 21 publications

Vanillin-derived non-ionic surfactants as green corrosion inhibitors for carbon steel in acidic environments

Vanillin-derived non-ionic surfactants as green corrosion inhibitors for carbon steel in acidic environments

Synthesis, characterization and antimicrobial activity of N,N-bis(hydroxymethyl)-N-[(2-mercaptoacetoxy)methyl]alkyl ammonium bromide surfactant and their Co(II), Zn(II) and Sn(II) complexes

Three gemini cationic surfactants as biodegradable corrosion inhibitors for carbon steel in HCl solution

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