详情

原文传递 Non-Leaching, Benign, Fouling Control, Multilayer Polymer Coatings for Marine Applications: PP-1274 Findings.

题名：	Non-Leaching, Benign, Fouling Control, Multilayer Polymer Coatings for Marine Applications: PP-1274 Findings.
作者：	ober, c. k.
关键词：	ocean environments, leaching, ecosystems, fouling, environmental protection
摘要：	The goal of this research is to produce environmentally friendly coatings that protect the hulls of ships below the waterline against fouling by seaweed, barnacles, and other organisms. Fouling by these organisms produces additional drag on the ship, increasing the operating and maintenance costs. Currently, antifouling paints containing tin and copper biocides are used because of their effectiveness against most forms of fouling. However, these biocidal organometallic compounds that are environmentally persistent cause damage to the ecosystem, and enter the food chain. The ban on tributyltin (TBT) antifoulants by the International Maritime Organization will be effective in 2008, and copper-based coatings are expected to face similar restrictions in the near future. Non-toxic 'fouling-release' or 'fouling-repellant' coatings are the desirable alternatives to coatings that are biocidal. Silicone-based paints that belong to the former category are commercially available, but do not satisfy many of the desired performance characteristics. The soft silicones do not withstand the rigorous demands of the marine environment, do not sufficiently and consistently self-clean, or, due to polymer restructuring or other degradation pathways, lose many of the desirable surface properties with time and exposure to marine organisms. This report describes the synthesis and testing of block copolymers that contain semifluorinated (SF) and poly(ethylene glycol) (PEG) side groups, and show promise as non-toxic, antifouling substitutes to copper-containing paints. These surface-active groups modify the coating-water interfacial energy, conferring fouling- release or fouling- repellant properties to the surface. / Availability Note: Order this product from NTIS by: phone at 1-800-553-NTIS (U.S. customers); (703)605-6000 (other countries); fax at (703)605-6900; and email at orders@ntis.gov. NTIS is located at 5285 Port Royal Road, Springfield, VA, 22161, USA.
总页数：	u0824；22p
报告类型：	科技报告