Antibacterial Activity of Certain Phenolic Resins: Effect of -OH and -NH- Groups on Escherichia-Coli Bacteria

In the present work, we demonstrate the activity of certain synthesised phenolic resins presenting -OH and NH- groups on Escherichia-Coli bacteria, synthesise was carried with phenols and formaldehyde in catalysed medium. Characterisation of these resins by IR and NMR spectroscopy shows the presence of –CH₂– for novolac and substituted resins, and –CH₂O– for resol resin. The study of the antibacterial activity by the membrane filtration method (Q = 0.4μ) by varying resin mass and time gives a better results with the resins containing –N⁺ R₂- group than the others with only –OH group.