| Globally,biological fouling is regarded as one of the main culprits of marine fouling.This type can seriously corrode many long-term submerged structural facilities,such as offshore structural oil platforms,aquaculture cages,pipelines and water tanks in water purification plants,and the marine transportation industry.In the process of transportation,the hull is attached by a large number of microorganisms to form a biofilm that is difficult to remove,which makes the increased roughness of the hull surface cause the increase of resistance,and finally leads to the decline of the navigation speed.The use of environment-friendly programs to prevent bio-fouling will neither cause toxic effects to marine creature and humans,but also can greatly reduce the economic loss of fuel waste caused by overcoming resistance.Inspired by the nature,the bionic functional structure uses simpler ways to produce production,which provides inspiration for the industrial production to prevent marine biological fouling.The unique egg beater structure of the Salvinia blades with strong underwater superhydrophobicity can form a stable air layer,which can be used as a prototype of bionic antifouling films.The conclusion that the hydrophobic room-temperature silicone sulfide rubber has a pollutant release function,which can effectively prevent the adhesion of defaced organisms,has been confirmed by many researchers.The negatively charged graphene is effectively repelled with the negatively charged defaced biological surfaces.Combined with the advantages of the above three,we use room-temperature silicone sulfide rubber and graphene to prepare Salvinia bionic microstructure antennal antifouling film(micro-SR-GN).This work content mainly includes the following aspects:(1)Preparation of anti-fouling films: the graphene powder is doped into room temperature silicone sulfide rubber and poured into the pre-made with and without microstructure template,and the micro-SR-GN or SR-GN antifouling films are obtained after curing.The silicone rubber was poured into the with and without microstructure template.After curing,the micro-SR or SR antifouling surface was obtained.The hydrophilic modification method of polyvinyl pyrrolidenone(PVP)was used to prepare the hydrophilic tip(HT)of the antenna micro-SR-GN-HT.The antennae of micro-SR-GN were immersion modified by Na OH modification to obtain micro-SR-GN-Na OH.(2)Characterization of antifouling surface: The successful addition of graphene was confirmed by scanning electron microscope,X-ray diffraction and Raman spectroscopy of the graphene-added surfaces.The Fourier infrared spectroscopy and water contact angle determination of micro-SR-GN-HT and micro-SR-GN-Na OH were confirmed successfully.(3)Bubble adsorption capacity of antifouling surfaces: micro-SR-GN,micro-SR-GN-HT,SR-GN and micro-SR-GN-Na OH in dynamic underwater bubble adsorption capacity was determined,and the results found that the bubble adsorption capacity of micro-SR-GN has the best durability.(4)Static and dynamic antifouling experiment: micro-SR-GN,SR-GN,micro-SR-and micro-SR-GN-Na OH for dynamic and static antifouling experiments,the results show that micro-SR-GN has excellent resistance to Pantrophic paramococcus,Bacillus subtilis and Chlorella pyrenoidosa in static or dynamic conditions.In conclusion,the Salvinia biomimetic microstructure antennal antifouling film(micro-SR-GN)prepared in this work has a strong bubble adsorption function,and the formed bubble physical barrier can effectively hinder the adhesion of defacing organisms.It has opened up new ideas for the field of marine bio-fouling prevention. |
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