| Autor: |
Benda J; Department of Coatings and Polymeric, North Dakota State University, Fargo, North Dakota 58108, United States., Narikiyo H; Graduate School of Engineering, Department of Polymer Chemistry, Kyoto University, Sakyo Ward, Kyoto 606-8501, Japan., Stafslien SJ; Department of Coatings and Polymeric, North Dakota State University, Fargo, North Dakota 58108, United States., VanderWal LJ; Department of Coatings and Polymeric, North Dakota State University, Fargo, North Dakota 58108, United States., Finlay JA; School of Natural and Environmental Sciences, Newcastle University, Newcastle upon Tyne NE1 7RU, U.K., Aldred N; School of Life Sciences, University of Essex, Wivenhoe Park, Colchester CO4 3SQ, U.K., Clare AS; School of Natural and Environmental Sciences, Newcastle University, Newcastle upon Tyne NE1 7RU, U.K., Webster DC; Department of Coatings and Polymeric, North Dakota State University, Fargo, North Dakota 58108, United States. |
| Abstrakt: |
Combining amphiphilic fouling-release (FR) coatings with the surface-active nature of amphiphilic additives can improve the antifouling/fouling-release (AF/FR) properties needed to offer broad-spectrum resistance to marine biofoulants. This work is focused on further tuning the amphiphilic character of a previously developed amphiphilic siloxane-polyurethane (SiPU) coating by varying the amount of PDMS and PEG in the base system. Furthermore, surface-modifying amphiphilic additives (SMAAs) were incorporated into these amphiphilic FR SiPU coatings in varying amounts. ATR-FTIR, contact angle and surface energy measurements, and AFM were performed to assess changes in surface composition, wettability, and morphology. AF/FR properties were evaluated using laboratory biological assays involving Cellulophaga lytica , Navicula incerta , Ulva linza , Amphibalanus amphitrite , and Geukensia demissa . The surfaces of these coatings varied significantly upon changes in PDMS and PEG content in the coating matrix, as well as with changes in SMAA incorporation. AF/FR properties were also significantly changed, with formulations containing the highest amounts of SMAA showing very high removal properties compared to other experimental formulations, in some cases better than that of commercial standard FR coatings. |
