Study on Fouling-Resistant Performance Improvement of Silicone-Based Coating with Poly(Acrylamide-Silicone)

摘要

In this paper, an improved fouling-resistant silicone-based coating was designed and prepared with theaddition of an amphiphilic additive of poly (acrylamide-silicone) (PAS) into silicone. The preparationof the amphiphilic additive and the designed coating was introduced and characterized. Test resultsshowed that, the addition of PAS into silicone coating could significantly increased the underwater airbubble contact angles (which were measured between the coating surface and the air bubble on thebubble side) of the coating surface, and 0.5% (w/w) of PAS loading in silicone could give it thehighest underwater air bubble contact angle hysteresis. The results also showed that the diatoms渞andominitial contact with the surface was sensitive to the underwater air bubble contact angle,while the 渋ntentionalbonding, such as diatoms permanent adhesion as well as mussels exploring forbasal byssus deposition, was sensitive to the underwater air bubble contact angle hysteresis. When0.5% (w/w) of PAS was loaded in silicone, the coating showed maximum effect on the inhibition ofdiatoms permanent adhesion and mussel basal byssus deposition, and it also could significantly lowerthe flow shear stress necessary to remove 50% of the settled diatoms Navicula sp. by 52% incomparison with control silicone coating. The addition of less than 1.5%(w/w) of PAS had no toxicityfor diatom Navicula sp. as well as mussels Mytilus galloprovincialis. Therefore, the copolymer of PAScould be used as a promising antifouling additive to enhance the antifouling ability of silicone-basedcoatings.