Key Laboratory of Superlight Materials and Surface Technology, Ministry of Education, College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, China.
Key Laboratory of Superlight Materials and Surface Technology, Ministry of Education, College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, China; Hainan Harbin Institute of Technology Innovation Research Institute Co., Ltd., Hainan 572427, China; Shandong Key Laboratory of Corrosion Science, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China.
J Colloid Interface Sci. 2022 Nov 15;626:815-823. doi: 10.1016/j.jcis.2022.06.180. Epub 2022 Jul 4.
An inorganic-organic composite coating is an effective way to solve the issue of marine organism attachment and realize multi-element synergistic antifouling. Herein, BiWO/boron-grafted polyurethane composite coatings (BWOB) composed of BiWO with three morphologies (nanosheet, flower and microsphere) and boron-grafted polyurethane (ITB) were successfully synthesized to achieve high-efficiency antifouling. BiWO nanoparticles were evenly distributed on the surface and inside the ITB to form micro/nanostructures. In the composite coatings doped with flower-shaped BiWO, 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 (·O) 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.
无机-有机复合涂层是解决海洋生物附着问题并实现多元素协同防污的有效方法。本文采用三种形貌（纳米片、花和微球）的 BiWO 和硼化聚氨酯（ITB）合成的 BiWO/硼化聚氨酯复合涂层（BWOB），实现了高效的防污性能。BiWO 纳米颗粒均匀分布在 ITB 的表面和内部，形成微/纳米结构。在掺杂花状 BiWO 的复合涂层中，BWOB-5 对大肠杆菌和金黄色葡萄球菌的抑菌和抗硅藻附着性能分别达到 95.43%和 98.38%，对菱形藻的抑制率达到 98.62%。此外，表面的微/纳米结构、光催化过程中稳定产生的羟基自由基（·OH）和超氧自由基（·O）以及 BWOB 复合涂层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 涂层具有优异的环保性能。因此，BWOB 涂层有望在光催化杀菌和防污领域具有潜在的应用价值。
