Synthesis, characterization, surface and biocidal effect of some germinate nonionic surfactants

Abstract

Different fatty acid namely; palmitic, stearic, oleic and linoleic acids and polyethylene glycol-600 were reacted to give nonionic surfactants. The formed nonionic surfactants were reacted with germanium dioxide in presence of sodium carbonate to form germinates nonionic surfactants (I, II, III, and IV). The chemical structures of the synthesized surfactants were characterized by FT-IR and 1H-NMR spectra. The synthesized surfactants showed higher surface activity at different temperature and surface parameters influenced by chemical structure of surfactants. The thermodynamic calculations showed that adsorption and micellization processes are spontaneous. The synthesized surfactants showed good antimicrobial activities against the tested microorganisms including Gram positive, Gram negative as well as fungi. The promising inhibition efficiency of these compounds against the sulfate reducing bacteria facilitates them to be applicable in the petroleum field as new categories of sulfate reducing bacteria biocides.