Lekmuenwai Milin, Yingkiatinon Piyachit, Namkotr Warin, Tancharoensup Chatchawan, Muangnapoh Tanyakorn, Sodsai Tippawan, Sreearunothai Paiboon, Surawathanawises Krissada, Traipattanakul Bhawat
School of Integrated Science and Innovation, Sirindhorn International Institute of Technology, Thammasat University, Pathum Thani 12120, Thailand.
School of Manufacturing Systems and Mechanical Engineering, Sirindhorn International Institute of Technology, Thammasat University, Pathum Thani 12120, Thailand.
Nanomaterials (Basel). 2025 May 29;15(11):828. doi: 10.3390/nano15110828.
Dew collection is one of the most efficient water harvesting methods. In this work, we experimentally investigated the effects of modified nanostructured surfaces on water harvesting performance. Aluminum surfaces exhibiting hydrophobic, superhydrophobic, hydrophilic, and biphilic properties were utilized in this study. The superhydrophobic surface was fabricated using a fluorinated modified silica nanoparticles coating, while nanolaser processing and the surface abrasion with sandpapers were employed to create two distinct hydrophilic structures. In addition, various biphilic surface patterns, incorporating both superhydrophobic and hydrophilic characteristics, were also fabricated. The nanolaser-treated surface demonstrated the highest water harvesting performance, achieving a water collection of 386.7 mL/m. This performance represented a 42% increase compared to unpolished sample and a 282% increase relative to the superhydrophobic sample. Furthermore, the results indicated that the optimal biphilic surface pattern occurred at a 1:4 superhydrophobic-to-hydrophilic area ratio. The experimental outcomes were further interpreted through the mechanisms underlying water harvesting. Additionally, the experimental results were explained with the water harvesting mechanism.
露水收集是最有效的集水方法之一。在这项工作中，我们通过实验研究了改性纳米结构表面对集水性能的影响。本研究使用了具有疏水、超疏水、亲水和双亲性特性的铝表面。超疏水表面是通过氟化改性二氧化硅纳米颗粒涂层制备的，而纳米激光加工和砂纸表面研磨则用于创建两种不同的亲水结构。此外，还制备了各种兼具超疏水和亲水特性的双亲性表面图案。纳米激光处理的表面表现出最高的集水性能，集水量达到386.7 mL/m。与未抛光样品相比，该性能提高了42%，相对于超疏水样品提高了282%。此外，结果表明，最佳的双亲性表面图案出现在超疏水与亲水面积比为1:4时。通过集水的潜在机制对实验结果进行了进一步解释。此外，还用集水机制解释了实验结果。
