Abstract：
An inorganic-organic composite coating is an effective way to solve the issue of marine organism attachment and realize multi-element synergistic antifouling. Herein, Bi2WO6/boron-grafted polyurethane composite coatings (BWOB) composed of Bi2WO6 with three morphologies (nanosheet, flower and microsphere) and boron-grafted polyurethane (ITB) were successfully synthesized to achieve high-efficiency antifouling. Bi2WO6 nanoparticles were evenly distributed on the surface and inside the ITB to form micro/nanostructures. In the composite coatings doped with flower-shaped Bi2WO6, BWOB-5 showed excellent antibacterial and antidiatom adhesion properties, achieving 95.43% and 98.38% against Escherichia coli and Staphylococcus aureus, respectively, and 98.62% against Nitzschia closterium. In addition, the micro/nanostructure on the surface, the stable production of hydroxyl radicals (·OH) and superoxide radicals (·O2-) during photocatalysis, and the antifouling functional groups of the resin matrix in the BWOB composite coatings were all conducive to photocatalytic antifouling activity. More importantly, BWOB coatings exhibited excellent environmentally friendly properties. Therefore, BWOB coatings are expected to have potential application value in the field of photocatalytic sterilization and antifouling.
摘要：
无机-有机复合涂层是解决海洋生物附着问题、实现多元协同防污的有效途径。在这里，Bi2WO6/硼接枝聚氨酯复合涂层（BWOB）由具有三种形态（纳米片，花和微球）和硼接枝聚氨酯（ITB）成功合成，实现了高效防污。Bi2WO6纳米颗粒均匀分布在ITB表面和内部以形成微/纳米结构。在掺杂花形Bi2WO6的复合涂层中，BWOB-5表现出优异的抗菌和抗硅藻粘附性能，对大肠杆菌和金黄色葡萄球菌分别达到95.43%和98.38%，分别,和98.62%的抗Nitzschiaclosterium。此外,表面上的微/纳米结构，光催化过程中羟基自由基（·OH）和超氧自由基（·O2-）的稳定产生，BWOB复合涂料中树脂基体的防污官能团均有利于光催化防污活性。更重要的是,BWOB涂料表现出优异的环保性能。因此,BWOB涂料有望在光催化杀菌和防污领域具有潜在的应用价值。
