Natural products to control biofilm on painted surfaces

BOGDAN, SOFIA; DEYA, CECILIA; MICHELONI, OSCAR; BELLOTTI, NATALIA; ROMAGNOLI, ROBERTO

PIGMENT & RESIN TECHNOLOGY

EMERALD GROUP PUBLISHING LIMITED

Año: 2018 vol. 47 p. 180 - 187

0369-9420

This paper aims to study five vegetables extracts as possible additives to control bacterial growth on indoor waterborne paints. Theextracts were obtained from the weeds Raphanus sativus, Rapistrum rugosum, Sinapis arvensis, Nicotiana longiflora and Dipsacus fullonum, used intraditional medicine as antimicrobial compounds.Weeds extracts were characterized by Fourier transform infrared spectroscopy and UV?Vis spectrophotometry.Their antibacterial activity against Escherichia coli and Staphylococcus aureus was also determined. Afterward, selected extracts were incorporatedin waterborne paint formulations. The paints? antimicrobial activity was assessed against S. aureus, monitoring biofilm formation by environmentalscanning electron microscopy.As a general rule, results showed that tested paints were efficient in inhibiting biofilm formation, especially that formulated withNicotiana longiflora.