45267-19-4Relevant articles and documents
Amidoamine double tailed cationic surfactant based on dimethylaminopropylamine: Synthesis, characterization and evaluation as biocide
Shaban, Samy M.,Aiad, Ismail,Fetouh, Howida A.,Maher, Amr
, p. 699 - 707 (2015)
Three amidoamine cationic surfactants with double tailed were prepared and their chemical structures was confirmed using spectroscopic analysis like FTIR and 1H NMR. The surface parameters of the amidoamine surfactants were determined from surface tension and conductance measurements. The double tailed amidoamine surfactant shown low critical micelle concentration than conventional surfactants with their dependence on chain length and temperatures. Thermodynamic parameters clarified the tendency of surfactants to adsorb at interface than to form micelle and both of the two processes depend on the alkyl chain and temperature. The prepared surfactants were evaluated against microorganism showing that they have good biological activity against both Gram positive and negative bacteria but they have no effect on fungi.
A lycine amphoteric surface active agent and its preparation method
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Paragraph 0059; 0061, (2018/10/02)
The invention discloses a glycine betaine-type ampholytic surfactant and a preparation method thereof. The preparation method of the glycine betaine-type ampholytic surfactant comprises the following steps of (1) amidation reaction: carrying out amidation reaction on natural fatty acid and 3-dimethylaminopropylamine under the action of a catalyst, and timely removing water generated through reaction by using a 4A molecular sieve to obtain alkylamid-propyl dimethyl tertiary amine; and (2) quaterisation reaction: carrying out quaterisation reaction on alkylamid-propyl dimethyl tertiary amine and sodium chloroacetate in a solvent to obtain the glycine betaine-type ampholytic surfactant. The ampholytic surfactant group contains an amido bond, the performance of the molecule is changed, the glycine betaine-type ampholytic surfactant has better foam stability and mild performance, and the emulsifiability is obviously superior to that of the glycine betaine-type ampholytic surfactant. The preparation method is simple in process and low in production cost; the raw materials are green and natural; the water generated in the amidation reaction process is absorbed through the 4A molecular sieve; and the yield is improved.
N-(3-(Dimethyl benzyl ammonio)propyl)alkanamide chloride derivatives as corrosion inhibitors for mild steel in 1 M HCl solution: Experimental and theoretical investigation
Shaban, Samy M.
, p. 39784 - 39800 (2016/05/24)
The effects of N-(3-(dimethyl benzyl ammonio)propyl)lauramide chloride (DMBL), N-(3-(dimethyl benzyl ammonio)propyl)myristamide chloride (DMBM) and N-(3-(dimethyl benzyl ammonio)propyl)palmitamide chloride (DMBP) on the corrosion of mild carbon steel in acidic medium (1.0 M HCl) were investigated using weight loss and electrochemical measurements. The inhibition efficiency was found to be hydrophobicity- and temperature-dependent. Increasing the hydrophobic chain length increased the efficiency due to greater adsorption on the metal surface. The inhibition efficiency is directly proportional to the tested temperature. The electrochemical polarization study revealed that the tested cationic surfactants are mixed-type inhibitors. The Villamil adsorption isotherm is the better-fitted model for describing the adsorption process on the selected steel in 1.0 M HCl medium. The change in the free energy of adsorption of the synthesized cationic surfactants on the metal surface indicates that the adsorption process is chemisorption. Double-layer capacitance values obtained from electrochemical impedance spectroscopy decrease in the presence of the synthesized surfactant. Quantum chemical calculations support the experimental data and the adsorption on the metal surface.
