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Hydrophilic silicone coatings as fouling release: simple synthesis, comparison to commercial, marine coatings and application on fresh water-cooled heat exchangers
Holberg, S.; Losada, R.; Blaikie, F.H.; Hansen, H.H.W.B.; Soreau, S.; Onderwater, R.C.A. (2020). Hydrophilic silicone coatings as fouling release: simple synthesis, comparison to commercial, marine coatings and application on fresh water-cooled heat exchangers. Materials Today Communications 22: 100750. https://hdl.handle.net/10.1016/j.mtcomm.2019.100750
In: Materials Today Communications. Elsevier: Amsterdam. e-ISSN 2352-4928
Peer reviewed article  
Beschikbaar in  Auteurs 
Trefwoord
    Marien/Kust
Author keywords
    Fouling; Fouling release; Silicone; Polyethylene glycol; Heat exchanger; Power plant
Auteurs  Top 
  • Holberg, S.
  • Losada, R.
  • Blaikie, F.H.
  • Hansen, H.H.W.B.
  • Soreau, S.
  • Onderwater, R.C.A.
Abstract
    A synthesis route to hydrophilic, biocide-free fouling-release coatings by dispersing a polydimethyl siloxane (silicone, PDMS)-polyethylene glycol (PEG) copolymer in a PDMS coating is described. In comparison to known coatings including commercial fouling release for marine vessels, anti-fouling and fouling release performance was investigated by laboratory tests (contact angle, pseudo barnacle test and bacteria culture test applying Pseudomonas aeruginosa) and by application on fresh water-cooled surface condensers mimicking conditions of thermal power plants. A developmental silicone coating comprising PEG reduced fouling growth and adhesion in laboratory tests by more than a factor of ten compared to steel. In a freshwater exposure test, a comparative, commercial fouling release coating performed better than the developmental PEG-PDMS coating and is a promising candidate for applications on surface condensers of thermal power plants as it reduces fouling at a flow rate of just 1.6 m/s.
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