Non-toxic, anti-fouling silicones with variable PEO-silane amphiphile content Academic Article uri icon


  • Non-toxic silicone coatings with improved resistance to diatom slime formation were prepared by simple blending and curing with a poly(ethylene oxide) (PEO)silane amphiphile: -(ethylene oxide)3Si-(CH2)2-oligodimethylsiloxane13-block-poly(ethylene oxide)8-OCH3. Coatings were formed by blending varying levels (1, 5 and 10wt%) into a room-temperature vulcanization (RTV), silica-reinforced silicone. The coatings were subjected to a series of biofouling tests, including exposure to Bacillus and Pseudoalteromonas bacteria and Cylindrotheca closterium diatoms, both individually and as a mixed community of Bacillus and C. closterium. Additionally, microfouling was evaluated upon exposure of the silicone coatings to natural seawater by submersion in the Atlantic Ocean for extended periods. Biofouling was assessed in terms of percentage of coverage, biomass and average thickness based on confocal laser scanning microscopy images. For all tests, silicones modified with 5 and 10wt% PEOsilane amphiphile exhibited similarly high anti-biofouling behavior. In addition, silicone coatings modified with just 1wt% PEOsilane amphiphile displayed a marked improvement on resistance to C. closterium diatom settlement compared to the unmodified silicone.

published proceedings


author list (cited authors)

  • Fay, F., Hawkins, M. L., Rehel, K., Grunlan, M. A., & Linossier, I.

citation count

  • 19

complete list of authors

  • Fay, Fabienne||Hawkins, Melissa L||Rehel, Karine||Grunlan, Melissa A||Linossier, Isabelle

publication date

  • January 2016