CATEGORY: BIOFOULING
Proceedings of International Conference on Heat
Exchanger Fouling and
Cleaning, June 9-14, 2013, Budapest, Hungary
Nanostructured
coatings for resistance to aquatic biofouling
P. Navabpour, X. Zhang and K. Cooke
parnia.navabpour@miba.com
Teere Coatings Ltd., Miba Coating Group, Droitwich, UK
Abstract
Thin
film coatings have been developed to reduce the build-up and to facilitate the
removal of biological organisms from aquatic surfaces, using industrially
compatible vacuum deposition processes. The aim was to develop coatings which
reduce biofouling through their composition and nanostructure, rather than the
release of toxic biocides, together with good adhesion and resistance to
environmental degradation.
The coatings ranged from transparent silicon oxide and siloxanes to
double layer and multilayer coatings. The biofouling evaluated in laboratory
tests using freshwater bacterium, Psudomonas fluorescens, showed significantly
improved antifouling performance compared to uncoated and standard surfaces. In
addition to their antibiofouling properties, the coatings impart improved
mechanical resistance and have the potential for use in a variety of
applications, including heat exchangers, sensors and windows for optical and
ultrasonic radiation, and filtration membranes. The magnetron sputtering,
plasma assisted chemical vapor deposition (PACVD) and hybrid process technology
is described and its relevance for anti-fouling applications in heat exchangers
is discussed.
Free Full Text Source: http://www.heatexchanger-fouling.com/papers/papers2013/43_Navabpour_F.pdf
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