The fabrication methods for high performance pervaporation (PV) desalination membranes were complicated and difficult to be scaled-up. To address this issue, we developed a composite membrane using a porous polysulfone (PSF) membrane that was prepared by a conventional non-solvent induced phase inversion (NIPS) technology. The key was to design the PSF structure with a skinless, macro-void free and bi-continuous cross-sectional morphology for achieving an ultra-low transport resistance. This was done by incorporating non-solvent additives of polyvinylpyrrolidone (PVP) and propionic acid (PA) into the PSF polymer dope and regulating the temperature of the water coagulant. As a result, the PSF based PV composite membrane exhibited a high-water flux of 124.8 ± 3.2 kg/(m²·h) and a salt rejection of 99.9% when separating a 3.5 wt% NaCl solution at 70 °C. Moreover, a water flux of 71.3 ± 1.8 kg/(m²·h) was achieved for treating a high concentrated NaCl solution of 20 wt%. To our best knowledge, these PV membrane desalination performances overshadowed all reported PV composite membranes using substrates fabricated by the NIPs method. Most importantly, the easy-to-scale-up membrane fabrication method, as well as the excellent PV desalination performance, indicated a great potential for industrial applications.

高性能渗透蒸发（PV）海水淡化膜的制备方法复杂且难以扩大规模。为了解决这个问题，我们开发了一种使用多孔聚砜 (PSF) 膜的复合膜，该膜是通过传统的非溶剂诱导相转化 (NIPS) 技术制备的。关键是设计具有无表皮、无大空隙和双连续横截面形态的 PSF 结构，以实现超低传输阻力。这是通过将聚乙烯吡咯烷酮 (PVP) 和丙酸 (PA) 的非溶剂添加剂加入到 PSF 聚合物涂料中并调节水凝固剂的温度来实现的。结果，基于 PSF 的 PV 复合膜表现出 124.8 ± 3.2 kg/(m ²·h) 在 70 °C 下分离 3.5 wt% 的 NaCl 溶液时，脱盐率为 99.9%。此外，处理 20 wt% 的高浓度 NaCl 溶液的水通量为 71.3 ± 1.8 kg/(m ² ·h)。据我们所知，这些 PV 膜脱盐性能超过了所有报道的使用 NIPs 方法制造的基板的 PV 复合膜。最重要的是，易于放大的膜制造方法以及出色的光伏脱盐性能表明其具有巨大的工业应用潜力。