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Characterization, surface properties and biological activity of new prepared cationic surfactants
Ismail Aiad,새미사반,Mohamed M. El-Sukkary,E.A. Soliman,Moshira Y. El-Awady 한국공업화학회 2014 Journal of Industrial and Engineering Chemistry Vol.20 No.4
Three cationic surfactants were prepared. A condensation reaction between dimethylaminopropylamine (DMAPA) and benzaldehyde was performed. The produced Schiff base was quaternization with three fatty alkyl bromide with different carbon chain length separately to form the desired cationic surfactants. The chemical structure of synthesized cationic surfactants was confirmed by FTIR, 1H NMR and mass spectroscopy. It was found that the chemical structure of prepared compounds has an effect on surface properties, where increasing the hydrophobic chain length decrease the values of CMC, ’max while Amin value was increased. The thermodynamic parameters showed that adsorption and micellization processes are spontaneous. It is clear that the prepared cationic surfactants at first tend to adsorb at surface, then it aggregate to form micelle. The prepared surfactants showed good biological activity against gram positive and negative bacteria and fungi in the following order of II (C12) > I (C10) > III (C16). The serial dilution method was used to evaluate the inhibiting effect of these compounds on the sulfate reducing bacteria growth.
Inhibition of mild steel corrosion in acidic medium by some cationic surfactants
Ismail Aiad,Mohamed M. El-Sukkary,E.A. Soliman,Moshira Y. El-Awady,새미사반 한국공업화학회 2014 Journal of Industrial and Engineering Chemistry Vol.20 No.5
The inhibition effect of some cationic surfactants on the corrosion of mild steel in 1.0 M HCl solution was studied by weight loss at 25–70 ℃ while potentiodynamic polarization and electrochemical impedance were used at 25 ℃. The results showed that all synthesized inhibitors were good inhibitors and their inhibition efficiencies were significantly increased by increasing both the concentration and temperature. Polarization curves revealed that the studied inhibitors act as mixed-type of inhibitors. Double-layer capacitances decrease with respect to the blank solution when these inhibitors added due to adsorption of these inhibitors on the steel surface. The adsorption of these inhibitors was found to obey Villamil adsorption model.
In situ and green synthesis of silver nanoparticles and their biological activity
Ismail Aiad,Mohamed M. El-Sukkary,E.A. Soliman,Moshira Y. El-Awady,새미사반 한국공업화학회 2014 Journal of Industrial and Engineering Chemistry Vol.20 No.5
The paper reported one-step in situ, facile and green synthesis of silver nanoparticles. In this technique, we had used the sun light as reducing agent as well as new prepared surfactant as catalyst and capping agent for reduction process and for sizing and shaping agent. The silver nanoparticles formation was investigated using UV–vis spectrophotometer, transmission electron microscope (TEM), dynamic light scattering (DLS), Energy Dispersive X-ray (EDX) and FTIR. The results showed formation uniform, well arrangement and hexagonal shape of silver nanoparticle. Both prepared surfactants and surfactants capping silver nanoparticles showed high antimicrobial activity against Gram-positive and Gramnegative bacteria and also against sulfate reducing bacteria (SRB).
One step green synthesis of hexagonal silver nanoparticles and their biological activity
새미사반,Ismail Aiad,Mohamed M. El-Sukkary,E.A. Soliman,Moshira Y. El-Awady 한국공업화학회 2014 Journal of Industrial and Engineering Chemistry Vol.20 No.6
Hexagonal and spherical silver nanoparticles were prepared by in situ and green synthesis using sunlight as reducing agent with assistance newly prepared cationic surfactant which act also as cappingagents. The silver nanoparticles formation was investigated using UV–vis spectrophotometer,transmission electron microscope (TEM), dynamic light scattering (DLS), energy dispersive X-ray(EDX) and FTIR. The results showed formation uniform, well arrangement hexagonal and sphericalshapes. Increasing hydrophobic chain length increase the stability and amount of AgNPS. Both preparedsurfactants and surfactants capping silver nanoparticles showed high antimicrobial activity againstGram-positive and Gram-negative bacteria.
새미사반,Ismail Aiad,Mohamed M. El-Sukkary,E.A. Soliman,Moshira Y. El-Awady 한국공업화학회 2014 Journal of Industrial and Engineering Chemistry Vol.20 No.6
The chemical structure of the prepared cationic surfactants which formed through condensationreaction between dimethylaminopropylamine (DMAPA) and butyraldehyde then quaternized by threefatty alkyl bromide was confirmed by FTIR, 1HNMR and mass spectroscopy. The chemical structure ofprepared compounds has an effect on surface properties. By increasing the hydrophobic chain length, thevalues of CMC and ’max decrease while Amin value was increased. The Thermodynamic parametersshowed that adsorption and micellization processes are spontaneous. It is clear that the preparedcationic surfactants tend to adsorb at surface, then it aggregate to formmicelle. The prepared surfactantsshowed good biological activity against Gram-positive and negative bacteria and fungi. The preparedcationic surfactant showed aggressive effect on the sulfate reducing bacteria growth.
Evaluation of some cationic surfactants based on dimethylaminopropylamine as corrosion inhibitors
새미사반,Ismail Aiad,Mohamed M. El-Sukkary,E.A. Soliman,Moshira Y. El-Awady 한국공업화학회 2015 Journal of Industrial and Engineering Chemistry Vol.21 No.1
Three cationic surfactants based on Schiff base were evaluated as corrosion inhibitors for carbon steel inacidic medium. Three techniques were used for the evaluation as corrosion inhibitors, namely; weightloss, polarization and electrochemical impedance. The results showed that all synthesized inhibitors aregood inhibitors and their inhibition efficiencies were significantly increased by increasing both theconcentration and temperatures. Polarization curves revealed that the studied inhibitors represent amixed-type inhibitors. Changes in impedance parameters such as charge transfer resistance, Rct, anddouble-layer capacitance, Cdl were indicative for adsorption of inhibitors on themetal surface, leading tothe formation of a protective film. The potentiodynamic polarization measurements indicated that theinhibitors are a mixed type. The adsorption of these inhibitors was found to obey Villamil adsorptionmodel.
Synthesis, characterization, surface and biocidal effect of some germinate nonionic surfactants
Mohamed F. Zaky,Ismail A. Aiad,AHMED SALAH MAHMOUD TAWFIK 한국공업화학회 2015 Journal of Industrial and Engineering Chemistry Vol.21 No.1
Different fatty acid namely; palmitic, stearic, oleic and linoleic acids and polyethylene glycol-600 werereacted to give nonionic surfactants. The formed nonionic surfactants were reacted with germaniumdioxide in presence of sodium carbonate to form germinates nonionic surfactants (I, II, III, and IV). Thechemical structures of the synthesized surfactants were characterized by FT-IR and 1H-NMR spectra. Thesynthesized surfactants showed higher surface activity at different temperature and surface parametersinfluenced by chemical structure of surfactants. The thermodynamic calculations showed thatadsorption and micellization processes are spontaneous. The synthesized surfactants showed goodantimicrobial activities against the tested microorganisms including Gram positive, Gram negative aswell as fungi. The promising inhibition efficiency of these compounds against the sulfate reducingbacteria facilitates them to be applicable in the petroleum field as new categories of sulfate reducingbacteria biocides.
Corrosion inhibition and Biocidal effect of some cationic surfactants based on Schiff base
새미사반,Atef Saied,AHMED SALAH MAHMOUD TAWFIK,A. Abd-Elaal,Ismail Aiad 한국공업화학회 2013 Journal of Industrial and Engineering Chemistry Vol.19 No.6
The three cationic surfactants based on Schiff base were laboratory prepared, (E)-decyl-4-[(2-hydroxyethylamino) methyl]-N,N-dimethyl benzenaminium bromide (I), (E)-dodecyl-4-[(2-hydroxyethylamino)methyl]-N,N-dimethyl benzenaminium bromide (II) and (E)-hexadecyl-4-[(2-hydro-xyethylamino)methyl]-N,N-dimethyl benzenaminium bromide (III) were evaluated as corrosion inhibitors for carbon steel in acid medium and antimicrobial agents against sulfate reducing bacteria,SRB. Three techniques were used for the corrosion inhibition evaluation, namely; weight loss,polarization and electrochemical impedance. The serial dilution method was used to evaluate the inhibiting effect of these compounds on the sulfate reducing bacteria growth. The results showed that the prepared compounds have good antimicrobial activities against the SRB as well as they have high efficiency as corrosion inhibitors for carbon steel in 1 M HCl.