Parisi Gregory, Szewczyk Piotr K, Narayan Shankar, Stachewicz Urszula
Department of Mechanical, Aerospace, and Nuclear Engineering, Rensselaer Polytechnic Institute, 110 8th Street, Troy, New York 12180, United States.
Faculty of Metals Engineering and Industrial Computer Science, AGH University of Krakow, al. A. Mickiewicza 30, Krakow 30-059, Poland.
ACS Appl Mater Interfaces. 2023 Aug 23;15(33):40001-40010. doi: 10.1021/acsami.3c07044. Epub 2023 Aug 9.
The global water supply worsens yearly with climate change; therefore, the need for sustainable water resources is growing. One of them is fog water collectors with variable surface wettability, with multifunctional designs for utilization worldwide and to address regions with low humidity levels. Therefore, we created fiber meshes with a photoresponsive switchable surface. This study uses electrospun polyvinylidene fluoride (PVDF) meshes, whose wettability is controlled by adding TiO. The fog water collection performance is studied at high and low humidity levels. With TiO-PVDF, the electrospun mesh can be converted from hydrophobic to hydrophilic under UV irradiation and transformed back to a hydrophobic state with heat treatment. The switchable meshes were found to be more effective at water collection after UV irradiation at lower fog rates of 200 mL·h. The ability to switch between hydrophobic and hydrophilic properties as needed is highly desired in fog collection applications using electrospun meshes, as it can improve overall efficiency after UV irradiation.
随着气候变化，全球水资源供应逐年恶化；因此，对可持续水资源的需求不断增长。其中之一是具有可变表面润湿性的雾水收集器，其多功能设计可在全球范围内使用，并适用于低湿度地区。因此，我们创建了具有光响应可切换表面的纤维网。本研究使用静电纺聚偏二氟乙烯（PVDF）网，其润湿性通过添加TiO来控制。在高湿度和低湿度水平下研究雾水收集性能。对于TiO-PVDF，静电纺网在紫外线照射下可从疏水转变为亲水，并通过热处理变回疏水状态。发现在200 mL·h的较低雾率下紫外线照射后，可切换网在集水方面更有效。在使用静电纺网的雾收集应用中，根据需要在疏水和亲水特性之间切换的能力是非常理想的，因为它可以提高紫外线照射后的整体效率。
