Anti-Icing Chitin Coating System Development

摘要

Three concerns face marine paint manufacturers: anti-icing and antifoulingcapability and environmentally safe waste disposal. First, icephobic paints must prevent ice formation which leads to drag and structural damage. Conventional ship bottom coatings are based on (1) asphalt/oil media pigmented with a lead sulfate/aluminum and (2) a tung oil/phenolic medium. Second, antifouling paints must inhibit barnacles, algae and fungi destruction. Current paints contain TBT, cuprous oxide, mercury, water-soluble acrylic organotin polymer or polysiloxane silicone. Federal regulations require replacement of the coatings and antifouling materials in the next few years. Last, all liquid-applied spray coatings are subject to transfer efficiency of less than 50%. The overspray clogs grates, interfers with spray booth airflows, and must be separated and disposed. Usually, the sludge is landfilled, produced downstream pollution. (JS)