Gao Chunlei, Zhang Lei, Hou Yongping, Zheng Yongmei
Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education, School of Chemistry, Beihang University, Beijing, 100191, P.R. China.
School of Mechanical Engineering and Automation, Beihang University, Beijing, 100191, P.R. China.
Adv Mater. 2023 Oct;35(42):e2304080. doi: 10.1002/adma.202304080. Epub 2023 Sep 15.
Preparing UV-resistant heterogeneous wettability patterns is critical for the practical application of surfaces with heterogeneous wettability. However, combining UV-resistant superhydrophobic and superhydrophilic materials on heterogeneous surfaces is challenging. Inspired by the structure of cell membranes, a UV-resistant heterogeneous wettability-patterned surface (UPS) is designed via laser ablation of the coating of multilayer structures. UV-resistant superhydrophobic silica patterns can be created in situ on surfaces covered with superhydrophilic TiO nanoparticles. The UV resistance time of the UPS with a TiO -based surface is more than two orders of magnitude higher than that obtained with other surface molecular modification methods that require a mask. The cell-membrane-like structure of the UPS regulates the migration of internal siloxane chain segments in the hydrophilic and hydrophobic regions of the surface. The UPS enables efficient patterning of functional materials under UV irradiation, controlling the wetting behavior of liquids in open-air systems. Furthermore, its heterogeneous wettability remains stable even after 50 h of intense UV irradiation (365 nm, 500 mW cm ). These UV-resistant heterogeneous wettability patterned surfaces will likely be applied in microfluidics, cell culture, energy conversion, and water collection in the future.
制备具有抗紫外线性能的异质润湿性图案对于具有异质润湿性的表面的实际应用至关重要。然而，在异质表面上结合抗紫外线的超疏水和超亲水材料具有挑战性。受细胞膜结构的启发，通过对多层结构涂层进行激光烧蚀，设计了一种具有抗紫外线性能的异质润湿性图案化表面（UPS）。在覆盖有超亲水TiO纳米颗粒的表面上可以原位形成抗紫外线的超疏水二氧化硅图案。基于TiO的表面的UPS的抗紫外线时间比其他需要掩膜的表面分子修饰方法获得的抗紫外线时间高出两个数量级以上。UPS的细胞膜状结构调节表面亲水和疏水区域内硅氧烷链段的迁移。UPS能够在紫外线照射下对功能材料进行高效图案化，控制露天系统中液体的润湿行为。此外，即使在强烈紫外线照射（365nm，500mW/cm）50小时后，其异质润湿性仍保持稳定。这些具有抗紫外线性能的异质润湿性图案化表面未来可能会应用于微流体、细胞培养、能量转换和水收集等领域。
