Tailoring the Surface Properties of Coatings Through Self-Stratification
Technical Report,01 Apr 2012,31 May 2016
NORTH DAKOTA STATE UNIV FARGO FARGO United States
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In order to combat biofouling, self-stratified siloxane PDMS-polyurethane PU coatings have been developed as potential fouling release coatings. To understand the effect of surface damage on the fouling release performance of the coatings, the coatings were abraded using two different Scotch Brite pads with varying roughness, under varying loads. The contact angle and surface energy data showed that the coatings retained their hydrophobicity even after abrasion. The FR performance against microfoulants deteriorated, but the performance of the abraded coatings improved towards barnacles. Based on the results obtained, it was hypothesized that the FR behavior was dependent on the size of the features formed after abrasion, relative to the size of the fouling organism. Analysis of the surface features further supported this hypothesis.