Fouling Release Siloxane-Polyurethane Coating Enables Easier Removal of Biofouling Organisms, Graffitti, Etc. (Technology RFT-588)
Scientists at NDSU have developed a siloxane-polyurethane coating that reduces the strength with which problematic fouling organisms and materials attach to surfaces. The self-stratifying coating uses block copolymers of hydrophilic poly(sulfobetaine methacrylate) (poly(SMBA)) and hydrophobic poly(dimethyl siloxane) (PDMS) to provide an amphiphilic surface. The poly(SMBA) is highly stable in marine environments, enabling a long-lasting hydrophilic coating. The technology is not designed to prevent attachment of fouling organisms / materials, but is rather to make their removal easier. Therefore, the technology would best be applied to situations where a surface can be cleaned with high pressure water, is exposed to rapid liquid flow, or otherwise is accessible for cleaning.
The performance attributes of the linear structure derived from the NDSU monomers provide significant benefits as compared with competing plant oil based polymers.
- Comparable fouling release properties to industry standard
- Mechanical performance significantly improved over silicone elastomers
- High durability in marine environments
- Excellent adhesion eliminates the need for a separate tie-coat
- Enables easier removal of fouling organisms and materials, making restoration of surfaces much more practical than with existing anti-fouling coatings.
Henry Nowak, Technology Manager
NDSURF Tech Key
RFT, 588, RFT588
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