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Volume 3 Recycling 2019 & Material Science 2019
July 22-23, 2019
Page 16
Material Science and Nanotechnology
Global Recycling Summit
July 22-23, 2019 | Rome, Italy
6th International Conference on
&
Journal of Environmental Geology
Todorka Vladkova
University of Chemical Technology and Metallurgy, Bulgaria
Low adhesive surfaces to non-toxic control of marine biofouling
The current non-toxic marine biofouling control is based on the idea for creation of non-adhesive, low-fouling material surfaces.
Strong/super hydrophobic low-energy surfaces (LES) are preferable in the marine biofouling control because of their stability
in water media. Siloxane fouling release coatings still are the only viable non-toxic commercial alternative to the toxic biocide
antifouling paints although antioxidant coatings and super hydrophobic surfaces are discussed lately as other ones. However,
the siloxane fouling release coatings only partially inhibit biofouling since biofilms remain a major issue. With aim to reduce
bacterial adhesion and multispecies biofilm formation, non-ionic surfactants (NISs), non-toxic antioxidants (NAOs) or their
combinations, NIS/NAO and PEG-silane co-cross-linker were tested as modifying agents in such nanocomposite coatings
together with a creation of super hydrophobic surfaces. The antimicrobial activity was correlated to surface physical-chemical
and physical-mechanical parameters relevant to bio-adhesion. Antifouling siloxane nano composite coatings were developed
with excellent anti-biofouling properties: totally preventing marine macro fouling even on static immersed surfaces as ell as
sharply reduced multispecies biofilm formation, the scare biofilm being easily removed by gentle wiping or cleaning with
running water. All experimental results indicate that the prevention of the complex marine biofouling process requires complex
approach.
Biography
VladkovahasherexpertiseinsurfaceengineeringstartingasamemberofapioneeringgroupinthedevelopmentofbrushtypePEGcoatings
(Coll&Surf,1986) to create bioinert biomaterial surfaces, that do not cause non-desirable response reactions. Later shemoves to bioactive
biomaterials andmaterial surfaces: bio-integrating biomimetic nanocomposites for bone tissue engineering; antimicrobial collagen based
nanocomposites; marine biofouling preventing composition coatings; magnetron sputtered antibacterial coatings for medical devices,
etc. Inhibition of bioadhesion and biofilm formation as well as surface characteristics, influencing biofouling (medical andmarine) are in the
focus of her investigations with a special emphasis on the non-toxic biofouling control including super hydrophobic surfaces utilization..
LES Strong hydrophobic silicon
coatings
WO 2008/074102 A1
Super
hydrophobic
surfaces
Stronghydrophobic
silicon coatings, reducing
marinebiofilm formation
AO,NISorAO/NIS
modified,
AO/NIS
modified,PEG-silane
co-cross-linked
TodorkaVladkova,JEnvironGeol. |Volume3
ISSN:2591-7641