Mohamed M. El-Sukkary

The Preparation and Characterization of Some Novel Quaternary Iminium Salts Based on Schiff-base as a Corrosion Inhibitor

Abstract Novel quaternary iminium compounds, namely, N-(4-methoxybenzylidene)-N-benzyldodecyliminium chloride (Ia), N-(4-methoxybenzylidene)-N-benzylhexadecyl iminium chloride (Ib), N-(4-methoxybenzylidene)-N-benzyloctadecyliminium chloride (Ic), and N-benzylidene-N-benzyldodecyliminium chloride, were prepared. The surface properties such as surface and interfacial tension, foaming, and emulsifying power of these surfactants were investigated. The surface parameters including critical micelle concentration (CMC), maximum surface excess (Γmax), minimum surface area (Amin), efficiency (PC20), and effectiveness (πCMC) were calculated. Free energy of micellization (ΔG°mic) and adsorption (ΔG°ads) were calculated.

Aqueous Solution Properties, Biodegradability, and Antimicrobial Activity of some Alkylpolyglycosides Surfactants

Abstract In the present investigation, a series of alkyl polyglycosides with alkyl chain length of C 8, 9, 10, 12 and 14 were synthesized using transacetalization method. Purity of the products was investigated using high performance liquid chromatography. Surface parameters particularly Effectiveness πcmc, Efficiency Pc20, maximum surface excess Γmax, minimum surface area Amin and HLB values are investigated, in addition to thermodynamic parameters (ΔGads and ΔGmic). Resistance to hydrolysis for the prepared compounds was investigated. The synthesized compounds were tested for their biodegradability in Nile river water according to Die-away test method and their antimicrobial activity against different strains of bacteria, yeast and fungi was investigated.

Synthesis and Properties of Some N-Acylethylenediamine Triacetic Acid Chelating Surfactants

Abstract A new kind of surfactants with chelating properties named N-acylethylenediamine triacetate (N-acyl ED3A) of different hydrocarbon chain lengths were synthesized from anhydrous ethylene diamine, fatty acid chlorides (Capryloyl, lauroyl, myristoyl, palmitoyl, stearoyl or oleoyl chloride) and chloroacetic acid. The chemical structures of the prepared compounds were confirmed using different spectroscopic techniques, primarily Fourier transform infrared spectroscopy and nuclear magnetic resonance. The surface properties including surface and interfacial tension, foaming height, emulsification power, calcium ion stability, stability to hydrolysis and critical micelle concentration (CMC) were determined. The trisodium N-acylethylenediamine triacetates have been found to combine the properties of strong surfactancy, extreme mildness with a high tolerance to water hardness, and ability to chelate metal ions, which indicates a promising application prospect in many fields.

Electrical and Gravimetric Estimation of the Corrosion Inhibition of Three Synthesized Cationic Surfactants N-(3-(Butylidene Amino) Propyl)-N, N-Dimethyl Alkan-1-Ammonium Bromide Derivatives in 1 M HCl

The inhibiting effect of three synthesized corrosion inhibitors that are based on Schiff base and named N-(3-(butylidene amino) propyl)-N,N-dimethyl decan-1-ammonium bromide, N-(3-(butylidene amino) propyl)-N,N-dimethyl dodecan-1-ammomium bromide, and N-(3-(butylidene amino) propyl)-N,N-dimethyl hexadecan-1-ammonium on the corrosion rate of mild steel in 1.0 M hydrochloric acid was monitored through gravimetric and electrochemical techniques at 25°C. The temperature effect ranging from 25°C to 70°C on the corrosion rate has been studied and used for predicting the adsorption isotherm and thermodynamic parameters. The propensity of the synthesized compounds to adsorb on the steel surface were found to obey Villamil adsorption isotherm. The inhibition efficiency was increased concurrently with a plethora of inhibitor concentration and a rise of the solution temperature. Polarization curves prove that the tested compounds act as mixed-type inhibitors. Double-layer capacitances of inhibitors decrease when compared to the blank solution.

Surface Parameters, Biodegradability, and Antimicrobial Activity of Some Trisodium N-acyl ED3A Surfactants

A new kind of surfactant with chelating properties named N-acyl ethylenediamine triacetate (N-acyl ED3A) of different hydrocarbon chain lengths was synthesized from anhydrous ethylene diamine, fatty acid chlorides (capryloyl, lauroyl, myristoyl, palmitoyl, stearoyl, or oleoyl chloride) and chloroacetic acid. Surface parameters and thermodynamic parameters were investigated. The prepared surfactants were tested for their biodegradability and their antimicrobial activity against different strains of bacteria, yeast, and fungi was investigated.