| With the development of the shipping industry,the problem of marine biological fouling has attracted more and more attention.The traditional antifouling coatings prevent marine biological fouling,while they also put tremendous pressure on the marine ecological environment.Due to the anti-fouling mechanism of fouling-release,low surface energy silicone antifouling coatings do not need to release toxic biocides to inhibit the attachment of marine fouling organisms.Its environmental friendliness makes silicone low surface energy coatings have a broad prospect in the future research and application of marine antifouling coatings.However,low surface energy coatings also have two shortcomings in practical applications:(1)The mechanical performance is poor.Once a collision occurs,the coating is likely to crack,the surface will be damaged,and the anti-fouling performance will also decline;(2)The anti-fouling performance is highly dependent on the flushing of water flow,and the anti-fouling performance in low-speed environment and static environment is not satisfactory.In response to these two problems,this paper first combines the advantages of organofluorine with the advantages of organosilicon by introducing organofluorine groups as side chains into the main chain of organosilicon groups.While retaining the flexibility of the organosilicon coating,it improves the mechanical properties of the coating and further improve the low surface energy properties of the coating.Next,it is reinforced by adding modified nano SiO2,and the bactericide is introduced into the low surface energy coating to impart antibacterial properties to the surface and improve the static antifouling ability of the coating..The molecular structure and composition of the target product were characterized by FI-TR,1H-NMR,and XPS.The influence of the introduction of organic fluorine groups on the wettability of low surface energy coatings was studied by contact angle.The introduction of organic fluorine groups increases the water contact angle of the coating by about 10°.Adhesion tester and tensile test show that the modified filler improves the mechanical strength of the coating.The anti-bacterial test and anti-diatom test prove that the grafted anti-fouling group has a significant improvement on the anti-fouling performance of the coating.When the amount of the cross-linking agent grafted with triclosan reaches 7.5%,the sterilization rate reaches 93%.Finally,the marine field test at Zhoushan Port shows that the triclosan-modified low surface energy fluorosilicone coating maintains excellent anti-fouling performance under the real marine environment for three months.In order to achieve the improvement of the antifouling performance of silicone low surface energy coatings without antifoulant,,in this paper,by adding non-toxic non-reactive methyl fluoro silicone oil to the fluorosilicone cross-linked coating,the methyl fluoro silicone oil oozes into the cross-linked coating to construct a bionic self-lubricating surface..By adjusting the molecular weight and amount of the added methyl fluorosilicone oil,it is explored that the effect of methyl fluorosilicone oil on the mechanical properties and antifouling performance of the fluorosilicone crosslinked coating.We characterize the coating wettability and mechanical properties by contact angle test and cross-cut method,and characterize the anti-fouling properties and clean performance of the coating by a series of experiments such as antibacterial experiments,anti-BSA adhesion,and sliding of various liquids on the coating surface.Appropriate methyl fluorosilicone oil molecular weight and addictive amount of super-lubricating coating can effectively improve the anti-fouling performance of fluorosilicone cross-linked coating.Finally,the stability test shows that the prepared ultra-lubricated fluorosilicone low surface energy coating still maintains excellent anti-fouling performance even after 7 days of evaporation and water scouring. |
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