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

    Year: 2013

    Journal: International Journal of Electrochemical Science, 2013, 8, pp 6478-6492, 20130926

    Authors: Cunguo Lin, Jinwei Zhang, Li Wang, Jiyong Zheng, Fengling Xu, Juan Zhou, Liangmin Yu

    Organizations: College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, China; State Key Laboratory for Marine Corrosion and Protection, Qingdao 266101, China; Luoyang Ship Material Research Institute, Qingdao 266101, China

    In this paper, an improved fouling-resistant silicone-based coating was designed and prepared with the addition of an amphiphilic additive of poly (acrylamide-silicone) (PAS) into silicone. The preparation of the amphiphilic additive and the designed coating was introduced and characterized. Test results showed that, the addition of PAS into silicone coating could significantly increased the underwater air bubble contact angles (which were measured between the coating surface and the air bubble on the bubble side) of the coating surface, and 0.5% (w/w) of PAS loading in silicone could give it the highest underwater air bubble contact angle hysteresis. The results also showed that the diatoms “random” initial contact with the surface was sensitive to the underwater air bubble contact angle, while the “intentional” bonding, such as diatoms permanent adhesion as well as mussels exploring for basal byssus deposition, was sensitive to the underwater air bubble contact angle hysteresis. When 0.5% (w/w) of PAS was loaded in silicone, the coating showed maximum effect on the inhibition of diatoms permanent adhesion and mussel basal byssus deposition, and it also could significantly lower the flow shear stress necessary to remove 50% of the settled diatoms Navicula sp. by 52% in comparison with control silicone coating. The addition of less than 1.5%(w/w) of PAS had no toxicity for diatom Navicula sp. as well as mussels Mytilus galloprovincialis. Therefore, the copolymer of PAS could be used as a promising antifouling additive to enhance the antifouling ability of silicone-based coatings.