Journal of Coatings Technology and Research

, Volume 15, Issue 5, pp 1191–1200 | Cite as

Natural compounds as potential algaecides for waterborne paints

  • Sandra G. Gómez de SaraviaEmail author
  • Silvia E. Rastelli
  • Guillermo Blustein
  • Marisa R. Viera
Brief Communication


To eliminate and prevent the formation of phototrophic biofilms on painted walls, chemicals are added to paints. These chemicals, in general, also have toxic effects on the environment. Plants synthesize secondary metabolites which have antimicrobial properties and that may be a sustainable alternative to traditional biocides. In this work, algal species isolated from biofilms formed on deteriorated painted surfaces were taxonomically identified. Observations with the optical microscope revealed the presence of mixed biofilms composed of algae belonging to the Cyanophyta, Chlorophyta, and Streptophyta divisions. The algaecide effect of natural compounds of vegetal origin such as anisole, eugenol, guaiacol, and thymol was evaluated by the microatmosphere technique. Growth inhibition of phototrophic organisms was obtained with thymol in all the concentrations used. Eugenol and guaiacol showed a total growth inhibition at the highest concentration assayed (300 μmol cm−2) and a decrease in growth at 40 μmol cm−2, while anisole did not exert any inhibitory action at the assayed concentrations. Due to these results, eugenol, thymol, and guaiacol were incorporated in an exterior waterborne paint at a concentration of 2%. Samples painted with these formulations were not colonized by algae, indicating that these compounds could be used as biocides in paint formulations.


Natural organic compounds Biocide Algaecide Waterborne paint Phototrophic biofilm 



The authors are grateful to the National University of La Plata Project 11/I201, CONICET PIP No. 00314 and CICBA 833/14 for the Grants received to finance this work.


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Copyright information

© American Coatings Association 2018

Authors and Affiliations

  • Sandra G. Gómez de Saravia
    • 1
    • 2
    Email author
  • Silvia E. Rastelli
    • 1
    • 2
  • Guillermo Blustein
    • 1
    • 3
  • Marisa R. Viera
    • 1
    • 4
  1. 1.Centro de Investigación y Desarrollo en Tecnologías de Pinturas (CIDEPINT), (CICPBA-CONICET)La PlataArgentina
  2. 2.Facultad de Ciencias Naturales y MuseoUNLPLa PlataArgentina
  3. 3.Facultad de Ciencias Agrarias y ForestalesUNLPLa PlataArgentina
  4. 4.Facultad de Ciencias ExactasUNLPLa PlataArgentina

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