Abstract
Three-component waterborne silicone antifouling coatings, which could cured at room temperature, were prepared, respectively, with cationic (stearyl trimethyl ammonium bromide) or anionic (sodium dodecyl benzene sulfonate) silicone emulsion as a film-forming substance, γ-methacryloxypropyltrimethoxysilane as a curing agent and dibutyltin dilaurate as a catalyst. The effect of emulsifier on the structure and properties of silicone coating was studied. The results showed that the coating with cationic silicone emulsion had high crosslinking density, and its surface is smooth. The surface of the coating prepared by the anionic silicone emulsion is rough. Emulsifier type had no obvious effect on the surface free energy of the waterborne silicone coating. The coatings have the characteristics of low surface energy and excellent bacterial desorption properties. Stearyl trimethyl ammonium bromide in the cured coating can reduce the adhesion of marine bacteria on the coating surface. Both the emulsifiers can inhibit the activity of Navicula Tenera. The waterborne silicone coating prepared by cationic silicone emulsion has better comprehensive mechanical properties and antifouling performance.
Highlights
Marine fouling organisms adhere to the hull, which will reduce the ship’s speed, increase fuel consumption, and cause blockage of marine pipelines
1a is the structural formula of the cationic emulsifier stearyl spectroscopy trimethyl ammonium bromide
Two kinds of water-based silicone antifouling coatings using silane coupling agent KH-570 as curing agent can be cured to form a film at room temperature
Summary
Marine fouling organisms adhere to the hull, which will reduce the ship’s speed, increase fuel consumption (up to 30%), and cause blockage of marine pipelines. Biological fouling brought huge economic losses [1,2,3]. Antifouling coatings play an important role in preventing fouling organisms from attaching. Due to its low surface energy, silicone antifouling paint causes marine organisms not to attach firmly. Fouling organisms are easy to remove under the action of water flows [4]. Silicone antifouling coatings have been widely studied and applied because of their excellent environmental friendliness. Major coating companies have put their products on the market [5]
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