Preparation Of Copper Ion Controlled Release Cuprous Oxide Coating And Study On Its Antifouling Performance

In order to solve the problem of high copper content and rapid initial release rate of the cuprous oxide antifouling coatings which is widely used at present,this paper introduces a self-polishing marine anti-fouling coating containing tertiary amino groups which is capable of complexing with copper ions.This antifouling coating is continuously hydrolyzed in the surface of seawater to achieve the purpose of self-polishing and to achieve the function of temporarily immobilizing the copper ions on the surface and reducing the copper ions loss rate by complexing the copper ions with the tertiary amino groups,which could enhance the antifouling ability,and reducing the additive amount of copper ions.In this study,we polymerized MMA,DMAEMA and TIPSA by random copolymerization to get random copolymer resin,Nano-cuprous oxide was doped to get coatings.NMR and FTIR were used to investigate the DMAEMA copper ion complex.The mechanism of the complexation reaction was confirmed as the coordination between copper ion and tertiary amine group.The complexation of DMAEMA with copper ion was measured by conductivity test and UV-visible spectrophotometer.It was proved that each copper ion can be complexed with up to 4 DMAEMA molecules.The complexing constant at p H=12 is about 4.8626 × 1011;when copper ions are complexed with PDMAEMA,1.52 tertiary amino groups are coordinated with each copper ion on average.The results of the coating performance test showed that the addition of DMAEMA can enhance the hydrophilicity and antibacterial property of the coating.The formation of complex can effectively slow down the loss rate of copper ions,and the complex also has antibacterial property.Long-term antibacterial properties were improved.The experimental results of field test showed that the addition of DMAEMA had an excellent antifouling performance at 12.5%-15%.By adding DMAEMA can effectively slow down the copper ion release rate to achieve economic and environmental benefits.