Trade-off in membrane distillation with monolithic omniphobic membranes
Trade-off in membrane distillation with monolithic omniphobic membranes
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DOI：
10.1038/s41467-019-11209-6
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发表时间：
2019-07-19
影响因子：
16.6
通讯作者：
Tong, Tiezheng
中科院分区：
文献类型：
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作者：
Wang, Wei;Du, Xuewei;Tong, Tiezheng
全憎液膜由于其上级抗润湿性而在膜蒸馏中具有重要的应用价值。然而，MD膜的设计框架仍然是不完整的，由于全憎膜制造的复杂性和润湿性和水蒸气渗透性之间缺乏基本的关系。在这里，我们提出了一种无颗粒的方法，使快速制造的单片全憎膜MD脱盐。我们的整体式全憎水膜在含表面活性剂的高盐给水MD脱盐中显示出优异的抗润湿性和水净化性能。我们确定，我们的单片MD膜的润湿性和水蒸气渗透性之间存在权衡。利用可调的润湿阻力和渗透性的膜，我们阐明了这种权衡的基本机制。我们设想，我们的制造方法以及对润湿阻力-蒸汽渗透性权衡的机械见解将为MD膜在各种水净化应用中的智能设计铺平道路。
Omniphobic membranes are attractive for membrane distillation (MD) because of their superior wetting resistance. However, a design framework for MD membrane remains incomplete, due to the complexity of omniphobic membrane fabrication and the lack of fundamental relationship between wetting resistance and water vapor permeability. Here we present a particle-free approach that enables rapid fabrication of monolithic omniphobic membranes for MD desalination. Our monolithic omniphobic membranes display excellent wetting resistance and water purification performance in MD desalination of hypersaline feedwater containing surfactants. We identify that a trade-off exists between wetting resistance and water vapor permeability of our monolithic MD membranes. Utilizing membranes with tunable wetting resistance and permeability, we elucidate the underlying mechanism of such trade-off. We envision that our fabrication method as well as the mechanistic insight into the wetting resistance-vapor permeability trade-off will pave the way for smart design of MD membranes in diverse water purification applications.