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Tuesday, 24 September 2019
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Raw materials & technologies, Applications, Protective & Marine coatings

Antifouling properties of marine bacteriocin incorporated epoxy based paint

Wednesday, 21 December 2016

Bacteriocin isolated from five different marine biofilm forming bacteria were evaluated for their antibacterial activities against each other.

Antifouling properties of marine bacteriocin incorporated epoxy based paint. Source: Petra Dirscherl/pixelio.de

Antifouling properties of marine bacteriocin incorporated epoxy based paint. Source: Petra Dirscherl/pixelio.de

Among them, the secondary metabolites isolated from Pseudomonas aeruginosa exhibited maximum antibacterial activity. When the pure strains of P. aeruginosa and Micrococcus sp. were co-cultured in liquid nutrient broth, the P. aeruginosa outcompeted the population of Micrococcus sp.

Field study on stainless steel in seewater

Further, a field study was conducted to show the antifouling activity of Pseudomonas aeruginosa biofilm, developed on stainless steel (SS) coupons in natural seawater for 60 days. Initiation of macrofouling was evident on the control coupon within 30 days of exposure; whereas no such incidence of macrofouling initiation could be observed on the coupon that was pre-biofilmed by P. aeruginosa even up to 60 days. Similarly, the bacteriocin incorporated epoxy based paint formulation exhibited antifouling property for 3 months. The bacteriocin of P. aeruginosa which exhibited antifouling activity was characterised using GC-MS and identified the active compounds.

The study is published in: Progress in Organic Coatings, Volume 103, February 2017, Pages 33–39

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