Browsing by Author "Akuzov D."
Now showing 1 - 3 of 3
Results Per Page
Sort Options
Item Composition antifouling coating: Effect of siloxane and fluorinated oil incorporation on marine biofilm formation(2014-01-01) Akuzov D.; Vladkova T.; Klöppel A.; Brümmer F.; Murthy S.Composition polysiloxane based coatings are currently the only viable commercial alternative of the toxic biocide containing antifouling paints. Oil incorporation improves the foul-releasing ability of the polysiloxane coatings. The impact of non-reactive, different molecular mass, both siloxane and fluorinated oil on the biofilm formation onto developed by us polysiloxane composition coating is presented. It is evaluated in laboratory and field experiments on the ground of the determination of the elastic modulus, water contact angle, critical surface tension, surface roughness and topography.Item Current approaches to reduction of marine biofilm formation(2014-01-01) Vladkova T.; Akuzov D.; Klöppel A.; Brümmer F.Biofilm formation is the initial step ofthe complex marine biofouling process, limiting the performance ofsubmerged surfaces in numerous applications. No technology is known up to now capable to stop the marine biofilm development even on biocidal paints coated surfaces. Several non-toxic approaches for control over marine biofilms based on physi-cal, chemical or/and biological methods, most of them inspired by the nature, are currently on search. Surface patterning, enzyme alternatives of toxic biocides and nature derived anti-biofilm agents (natural biocides, bio-surfactants/dispersants and quorum sensing inhibitors) are in the scope of this review.Item Sharply reduced biofilm formation from Cobetia marina and in black sea water on modified siloxane coatings(2018-04-01) Akuzov D.; Franca L.; Grunwald I.; Vladkova T.Siloxane fouling release coatings are currently the only viable non-toxic commercial alternative to toxic biocide antifouling paints. However, they only partially inhibit biofouling since biofilms remain a major issue. With the aim to improve the bacterial resistance of siloxane coatings modified with non-ionic surfactant (NIS), antioxidant (AO) or both NIS/AO, the ability of PEG-silane co-cross-linker was investigated to reduce Cobetia marina adhesion and multispecies biofilm formation from natural seawater. Surface physical-chemical and physical-mechanical parameters relevant to bio-adhesion were estimated before the testing of the biofilm formation. Slightly reduced biofilm from C. marina and sharply reduced multispecies biofilm, formed in natural sea water, were found on the PEG-silane co-cross-linked coatings without modifying additives. However, both C. marina growth and biofilm formation from natural sea water were sharply reduced on the PEG-silane co-cross-linked coatings containing NIS or AO, even more, no C. marina adhesion was seen on the coating containing NIS and AO simultaneously. Possible explanations of the observed effects are presented in this article. It was concluded that the PEG-silane co-cross-linker, toghether with NIS and AO, can be used as an efficient tool to additionally reduce the bioadhesion of Gram-negative marine bacteria and multispecies biofilm formation on siloxane antifouling coatings.