A thermo-responsive composite membrane was fabricated by electrospinning a temperature-sensitive skin layer composed of poly (N-isopropylacrylamide)/polystyrene (PNIPAM/PS) on a superhydrophobic polytetrafluoroethylene (PTFE) fabric substrate. During the membrane distillation (MD) process with a 35 g/L NaCl feed solution, the PNIPAM/PS-PTFE membrane showed a high average permeate flux of 35.78 L/(m²·h) (LMH), which is 1.6-fold higher than that of commercial PTFE membrane (22.06 LMH). Meanwhile, the PNIPAM/PS-PTFE membrane maintained a salt rejection of 99.99 %. Noteworthily, the prepared membrane possessed excellent durability for long-term MD operation and an improved fouling resistance. Even if organic foulants deposited on the membrane surface, the permeate flux could be recovered up to ∼100 % with thermal actuation cleaning. The recovery rate was much higher than that of the commercial PTFE MD membrane. More significantly, after 90 h of MD operation with real landfill leachate, the permeate flux remained 85 % with the assistance of thermal actuation cleaning. This work exemplified an effective strategy for thermo-responsive membrane preparation, which can achieve both high permeate flux and fouling reversibility. The novel thermo-responsive MD membrane is worthy of being introduced into treating wastewater containing organic foulants.

通过在超疏水聚四氟乙烯 (PTFE) 织物基底上静电纺丝由聚 (N-异丙基丙烯酰胺)/聚苯乙烯 (PNIPAM/PS) 组成的温度敏感表层来制造热响应复合膜。^{在使用 35 g/L NaCl 进料溶液的膜蒸馏 (MD) 过程中，PNIPAM/PS-PTFE 膜显示出 35.78 L/(m 2} ) 的高平均渗透通量·h) (LMH)，比商用 PTFE 膜 (22.06 LMH) 高 1.6 倍。同时，PNIPAM/PS-PTFE 膜保持 99.99% 的脱盐率。值得注意的是，所制备的膜具有出色的长期 MD 操作耐久性和改进的抗污染性。即使有机污染物沉积在膜表面，通过热驱动清洁也可以将渗透通量恢复至 ~100%。回收率远高于商业 PTFE MD 膜。更重要的是，在使用真实垃圾渗滤液进行 MD 操作 90 小时后，在热驱动清洁的帮助下，渗透通量保持在 85%。这项工作举例说明了热响应膜制备的有效策略，它可以实现高渗透通量和污染可逆性。