Liu Jie, Zhang Xinwen, Wang Ruoyun, Long Fei, Liu Lei
State Key Laboratory of Metal Matrix Composites, School of Material Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China.
Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration, Shanghai Jiao Tong University, Shanghai 200240, China.
Materials (Basel). 2020 Dec 6;13(23):5564. doi: 10.3390/ma13235564.
Superhydrophobic surfaces have attracted intensive attention in the antifouling field because of their excellent anti-bioadhesive performance and environmental friendliness. However, promising surfaces have met great challenges of poor mechanical robustness under harsh serving conditions. Herein, an organic-inorganic composite strategy, that the silane-modified TiO nanoparticles are compounded into the porous framework provided by the stable and indurative aluminum oxide film, is proposed to address the common serious problem in superhydrophobic surfaces. Different from the traditional superhydrophobic surfaces, this composite film possesses a ~18 μm thick layer which can provide strong support to silane-modified TiO nanoparticles. The resulting film can reserve superhydrophobicity to the surface even after a thickness loss of ~15 μm under continuous abrasion. At the same time, the results of the bacterial adhesive tests also verify that the film has the same long-term anti-bioadhesive performance. The film with superhydrophobicity, excellent anti-bioadhesive property, and stable robustness will make it a promising candidate for serving in a harsh environment, and the design concept of this film could be applied to various substrates.
超疏水表面因其优异的抗生物粘附性能和环境友好性而在防污领域引起了广泛关注。然而，有前景的表面在恶劣的使用条件下遇到了机械强度差的巨大挑战。在此，提出了一种有机-无机复合策略，即将硅烷改性的TiO纳米颗粒复合到由稳定且坚硬的氧化铝膜提供的多孔框架中，以解决超疏水表面普遍存在的严重问题。与传统的超疏水表面不同，这种复合膜具有约18μm厚的层，可为硅烷改性的TiO纳米颗粒提供强大的支撑。即使在连续磨损下厚度损失约15μm后，所得薄膜仍能保持表面的超疏水性。同时，细菌粘附测试结果也证实该薄膜具有相同的长期抗生物粘附性能。这种具有超疏水性、优异抗生物粘附性能和稳定强度的薄膜将使其成为在恶劣环境中应用的有前途的候选材料，并且该薄膜的设计理念可应用于各种基材。
