Biocidal Activity and Corrosion Inhibition of Some Cationic Surfactants Derived from Thiol Polyurethane | ||
| Egyptian Journal of Chemistry | ||
| Article 5, Volume 61, Issue 1, January and February 2018, Pages 45-60 PDF (1.22 M) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/ejchem.2017.2119.1169 | ||
| Authors | ||
| Mohammed Fahmy Zaky1; Ibrahim Sabbah2; Nabil Abdelmonem Negm1; Mostafa Hendawy* 3 | ||
| 1Petrochemicals Department, Egyptian Petroleum Research Institute | ||
| 2Alazhar University, Faculty of Science. | ||
| 3Alazhar university, Faculty of sceince, Chemistry department. | ||
| Abstract | ||
| Six series of cationic polyurethane surfactants [PQ10-20] were synthesized by the reaction between different six esters (which prepared by condensation of fatty alcohol namely: octanol, decanol, dodecanol, tetradecanol, hexadecanol and octadecanol with bromoacetic acid) and polyurethane as quaternizing agent. The chemical structures of these surfactants were confirmed using elemental analysis, FTIR spectra,+HNMR and UV analysis. The surface activities of the synthesized cationic thiol polyurethane surfactants showed their tendency towards adsorption at the air/water interface. The adsorption tendency was estimated from the values of surface tension and the depression of surface tension at the critical micelle concentration. The studied surfactants were evaluated as antimicrobial agents against pathogenic and sulfur reducing bacteria using inhibition zone diameters and minimum inhibition concentration values. The synthesized cationic thiol polyurethane surfactants showed good antimicrobial activities against the tested microorganisms including Gram positive, Gram negative as well as fungi. The synthesized compounds were tested for the activity as corrosion inhibitors against carbon steel corrosion in 2N H2SO4 at 50, 100, 200, 400 and 600 ppm. The inhibition efficiencies of the tested compounds showed good inhibition and protection of the carbon steel. The corrosion inhibition tendency correlated to the surface activity and chemical structure of the compounds. | ||
| Keywords | ||
| cationic surfactants; Surface activity; Adsorption; antimicrobial activity; Corrosion inhibition; polyurethane | ||
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