Yang Guoyan, Yin Zuozhu, Han Xiangyu, Ma Yongcun, Xu Jilin, Hong Zhen, Xie Chan, Luo Yidan, Xue Mingshan
School of Materials Science and Engineering, Nanchang Hangkong University, Nanchang, 330063, China.
School of Materials Science and Engineering, Nanchang Hangkong University, Nanchang, 330063, China.
Water Res. 2025 Aug 8;287(Pt A):124375. doi: 10.1016/j.watres.2025.124375.
The solar-powered interfacial evaporation approach demonstrates extensive applicability prospects within seawater desalination domains. Traditional solar energy evaporators (SE) are often designed without regard to factors such as surface structure optimization and synergistic combination of heterogeneous materials. In this study, inspired by the unique structure of durian fruit peel, a Janus composite hydrogel SE (SPP@PAM) with pyramidal array features was innovatively designed. The upper stratum of the SE comprises polypyrrole-integrated superhydrophobic pyramidal foam, with the lower stratum being a polyvinyl alcohol/agar hydrogel matrix crosslinked with aminated carbon nanotubes. The Janus structure improves evaporation efficiency while reducing droplet attachment, lowering the enthalpy of evaporation, and increasing the rate of water transfer. The results showed that the evaporation rate of SPP@PAM reached 3.54 kg·m⁻²·h⁻¹ under a single solar irradiation condition. After 18 days of cycling experiments, there was almost no salt accumulation on the surface. This research provides a new strategy for industrial-scale desalination.
太阳能驱动的界面蒸发方法在海水淡化领域展现出广阔的应用前景。传统的太阳能蒸发器（SE）在设计时往往未考虑表面结构优化和异质材料协同组合等因素。在本研究中，受榴莲果皮独特结构的启发，创新性地设计了一种具有金字塔阵列特征的Janus复合水凝胶SE（SPP@PAM）。该SE的上层由集成聚吡咯的超疏水金字塔泡沫组成，下层是与胺化碳纳米管交联的聚乙烯醇/琼脂水凝胶基质。Janus结构提高了蒸发效率，同时减少了液滴附着，降低了蒸发焓，并提高了水传输速率。结果表明，在单一太阳辐照条件下，SPP@PAM的蒸发速率达到3.54 kg·m⁻²·h⁻¹。经过18天的循环实验后，表面几乎没有盐分积累。该研究为工业规模的海水淡化提供了一种新策略。
