Fabrication and characterization of super-hydrophobic surfaces based on sandpapers and nano-particle coatings
Fabrication and characterization of super-hydrophobic surfaces based on sandpapers and nano-particle coatings
复制标题
DOI：
10.1016/j.colsurfa.2023.131358
复制
发表时间：
2023-06
期刊：
影响因子：
--
通讯作者：
Shabnam Mohammadshahi;Jordan Breveleri;Hangjian Ling
中科院分区：
文献类型：
--
作者：
Shabnam Mohammadshahi;Jordan Breveleri;Hangjian Ling
在这项工作中，我们通过在含有微米级磨料颗粒的砂纸上喷涂一层疏水纳米颗粒来制备一系列超疏水表面。研究了粒度范围从60到1500的砂纸。结果表明，粒度为240、400、800、1000和1500的涂层砂纸具有超疏水性，其水接触角为158° ~ 165°，滑动角为10° ~ 2°。然而，粒度为60、120和600的其他涂覆砂纸没有显示出超疏水性，可能是因为Cassie-Baxter状态不稳定。此外，我们还研究了流体静压力和液体流量对超疏水砂纸耐用性的影响。我们发现，如预期的那样，由于压力和液体流动，被气体覆盖的表面积的百分比降低，但是样品在最高压力（2.4 atm）和最高流速（5.0 m/s）下保持在部分Cassie-Baxter状态。在压力和流量测试之后，所有样品都保持其超疏水特性。空气胸甲对制造的样品的鲁棒性可以归因于分级粗糙结构。总之，我们开发了一种方法，可以显着降低制造强大的超疏水表面的成本。未来的工作是需要评估的超疏水砂纸的应用，如减阻，抗生物污垢，防结冰的性能。
In this work, we fabricate a series of super-hydrophobic surfaces by sprayed-coating a layer of hydrophobic nano-particles on sandpapers that contain micro-scale abrasive particles. Sandpapers with a range of grit sizes from 60 to 1500 are investigated. We find that the coated sandpaper with grit sizes of 240, 400, 800, 1000, and 1500 exhibit super-hydrophobicity with a high water contact angle ranging from 158° to 165° and a low sliding angle varying from 10° to 2°. However, other coated sandpapers with grit sizes of 60, 120, and 600 do not show super-hydrophobicity, possibly for the reason that the Cassie-Baxter state is not stable. Furthermore, we study the impacts of hydrostatic pressure and liquid flow on the robustness of the super-hydrophobic sandpapers. We find that the percentage of surface area covered by gas reduces due to pressure and liquid flow as expected, but the samples remain in the partial Cassie-Baxter state at the highest pressure (2.4 atm) and highest flow speed (5.0 m/s). After the pressure and flow tests, all samples retain their super-hydrophobic properties. The robustness of the air plastron on the fabricated samples could be attributed to the hierarchical roughness structures. In conclusion, we develop a method that could significantly reduce the cost of fabricating robust super-hydrophobic surfaces. Future work is required to evaluate the performance of the super-hydrophobic sandpapers for applications such as drag reduction, anti-biofouling, and anti-icing.