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Monday, 16 September 2019
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Raw materials & technologies, Applications, Protective & Marine coatings

Degradable polyurethane has good antifouling ability

Wednesday, 12 June 2013

The synthesis of a degradable polyurethane based on glycolide as soft segment provides a good marine anti-biofouling. 

The degradable polyurethane has a good marine anti-biofouling ability 

Source: Limnomar

The degradable polyurethane has a good marine anti-biofouling ability 

Source: Limnomar

Chinese researchers from the Faculty of Materials Science and Engineering (South China University of Technology, Guangzhou) and the Hefei National Laboratory for Physical Sciences at Microscale (Department of Chemical Physics, University of Science and Technology of China, Hefei) have prepared a degradable polyurethane (PU) with copolyester oligomer consisting of ε-caprolactone (CL) and glycolide (GA) as the soft segments. The material was synthesised by a combination of ring-opening polymerisation and condensation reaction.

 

More rapid degradation due to glycolide

Enzymatic and hydrolytic degradation experiments demonstrated that the PU can degrade in seawater. Such a PU exhibits a more rapid degradation in comparison to that with poly(ε-caprolactone) (PCL) soft segments because the introduction of GA can reduce the crystallinity, as revealed by differential scanning calorimetry (DSC) and polarizing optical microscope (POM).

Self-renewal property effects good antifouling ability  

Marine field tests show that the degradable PU has good antifouling ability due to its self-renewal property. Besides, such a PU can serve as a carrier and controlled release system for an antifoulant and the incorporation of an antifoulant in the PU can significantly improve the antifouling ability and duration.

This study was published in: Journal of Materials Chemistry B, 2013, Issue 1, pp 3099-3106.

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