Preparation of a structural bionic antifouling coating
The bionic anti-fouling coating is an anti-fouling coating prepared by simulating the skin and structure of marine organisms,or extracting the anti-fouling substances in the body of marine organ-isms.In this paper,the simple salt dissolution method was used to simulate the composite structure of the upper transparent layer and lower porous layer of soft coral.The anti-fouling chemical substances of saccharin,gabapentin and capric acid in soft coral were added in different ways to prepare bionic anti-fouling coatings with different compositions,and the fouling resistance of the coatings was studied.The results showed that the compression modulus of the sample with the ratio of saccharin∶gabapentin∶cap-ric acid of 47∶23∶25 was the smallest,followed by the sample with the ratio of 42∶33∶25 and the sam-ple with 0.01 g saccharin.The smaller the compression modulus,the easier it is to deform.The surface energy of the transparent layer and porous layer of the sample with the ratio of saccharin∶gabapentin∶capric acid of 47∶23∶25 was the smallest,which was 22.2 and 16.0 mJ/m2,respectively.The surface energy of the transparent layer and porous layer of the samples with the ratio of saccharin∶gabapentin∶capric acid of 42∶33∶25 and 0.01 g saccharin was second,which was 22.7,22.9 and 16.1,16.5 mJ/m2,respectively.The smaller the surface energy,the better the hydrophobicity and anti-fouling perfor-mance.The samples were tested for stain resistance and static antibacterial experiments.The research showed that compared with the bionic anti-fouling coatings with single anti-fouling component,the bionic anti-fouling coating with all three anti-fouling components had better anti-fouling effect.The sample with saccharin had better anti-fouling effect than that with other single anti-fouling components.
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