Zhu Shufang, Niu Yuke, Yan Xu
Industrial Research Institute of Nonwovens &Technical Textiles, Shandong Center for Engineered Nonwovens, College of Textiles & Clothing, Qingdao University, Qingdao 266071, China.
Shandong Yuma Sun-Shading Technology Corp, Ltd., Shouguang 262702, China.
Membranes (Basel). 2025 May 1;15(5):134. doi: 10.3390/membranes15050134.
Currently, solar-driven interface evaporation for seawater desalination is believed to be an effective way to overcome freshwater shortage. To improve the efficiency of solar-driven interfacial evaporators, designing the evaporator's structure is essential. In this study, we proposed a folded structure solar-driven interfacial evaporator with electrospun recycled PET/carbon nanotube fibrous membranes. The as-spun membranes were folded into 4, 8, and 16 petals. The results suggested that F@8 (fold with eight petals) had the best solar-driven evaporation performance, with a photothermal conversion efficiency of 90.59% and an evaporation rate of 1.31 kg·m·h, due to its lower light projection area and greater light absorption. The evaporation performance remained stable after 10 cycles. In addition, the concentration of ions in the freshwater collected after desalination was 2~3 orders of magnitude lower than that before desalination. These results indicate that a properly designed folded structure can effectively enhance evaporators through changing the light projection area and absorption. This approach might provide an effective way to optimize the structure of interfacial solar-driven evaporators.
目前，太阳能驱动的界面蒸发用于海水淡化被认为是克服淡水短缺的有效方法。为了提高太阳能驱动界面蒸发器的效率，设计蒸发器结构至关重要。在本研究中，我们提出了一种具有电纺回收PET/碳纳米管纤维膜的折叠结构太阳能驱动界面蒸发器。纺出的膜被折叠成4瓣、8瓣和16瓣。结果表明，F@8（8瓣折叠）具有最佳的太阳能驱动蒸发性能，光热转换效率为90.59%，蒸发速率为1.31 kg·m⁻²·h⁻¹，这是由于其较低的光投射面积和较高的光吸收率。经过10次循环后，蒸发性能保持稳定。此外，淡化后收集的淡水中离子浓度比淡化前低2至3个数量级。这些结果表明，合理设计的折叠结构可以通过改变光投射面积和吸收率有效地增强蒸发器。这种方法可能为优化界面太阳能驱动蒸发器的结构提供有效途径。
