Marine structures often suffer from biofouling, which may lead to macrofouling by marine animals like marine worms and barnacles, weighing down the structures and increasing the drag. This paper analyses the effect of the newly fabricated biological anti-adhesion Titania-Polyurea spray coating, which can effectively reduce biofouling from enriching on the surface. Through the surface characterization, bioassays and micro-channel drag-reduction test, the antibacterial effect caused by the nano-titanium dioxide is systematically studied. Compared to the different weight percentages of nano-TiO₂ in the coating system, the photocatalytic activity, riblet surface structure and hydrophobic wettability are supposed to be the key factors to reduce the flow resistance at a drag reduction rate of 3.0% and further enhance the anti-biofouling performance under dark conditions.

中文翻译：

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二氧化钛-聚脲涂层中所含的纳米二氧化钛对码头生物污垢和减阻的影响。

海洋结构经常遭受生物污染，这可能导致海洋动物（如海洋蠕虫和藤壶）发生大污垢，使结构沉重并增加阻力。本文分析了新型生物抗粘连性二氧化钛-聚脲喷涂涂料的效果，该涂料可有效减少因表面富集而引起的生物污染。通过表面表征，生物测定和微通道减阻试验，系统研究了纳米二氧化钛引起的抗菌作用。与涂料体系中不同重量百分比的纳米TiO 2相比，在减阻率为3时，光催化活性，肋状表面结构和疏水润湿性被认为是降低流阻的关键因素。