To solve the fouling and wetting issues in membrane distillation (MD), the preparation of membranes with a superhydrophobic surface has been a significant focus of researchers. In this study, an innovative biaxial electrospinning technology combined with a single PVDF-co-HFP polymer was employed to prepare a green superhydrophobic, monolayer hybrid membrane without using long-chain perfluorinated additives in one-step. Compared with nanofiber (NF) membranes, the surface roughness of the nanosphere-nanofiber (NF-NS) hybrid membranes increased 3.58 times, achieving a superhydrophobic surface (CA:153.8 ± 0.19°) while the single layer structure imparted good surface stability to the membrane. The introduction of nanospheres reduced the membrane's pore size, improved tensile strength, imparted a firmer pore structure, and reduced thermal conductivity, which contributed to a higher LEP value and average water flux. In MD testing, optical coherence tomography (OCT) technology was applied to monitor the foulant growth process in-situ on the membrane surface non-destructively and in real-time. Furthermore, a 7-day membrane distillation test was conducted with a water flushing operation, which demonstrated the outstanding long-term performance of the superhydrophobic NS-NF hybrid membrane, with a rejection rate of 99.8 ± 0.13% and average water flux of 29.6 ± 0.19LHM. These results represent valuable evidence for promoting the industrial development of MD technology by addressing stability and pollutant concerns.

为了解决膜蒸馏 (MD) 中的污染和润湿问题，制备具有超疏水表面的膜一直是研究人员的重点。在这项研究中，一种创新的双轴静电纺丝技术与单一的 PVDF- co相结合。-HFP 聚合物用于一步制备绿色超疏水性单层杂化膜，而无需使用长链全氟化添加剂。与纳米纤维（NF）膜相比，纳米球-纳米纤维（NF-NS）杂化膜的表面粗糙度增加了3.58倍，实现了超疏水表面（CA：153.8±0.19°），而单层结构赋予了良好的表面稳定性。膜。纳米球的引入减小了膜的孔径，提高了拉伸强度，赋予了更坚固的孔结构，并降低了热导率，这有助于提高 LEP 值和平均水通量。在MD测试中，光学相干断层扫描（OCT）技术被应用于非破坏性、实时地原位监测膜表面的污垢生长过程。此外，7天的膜蒸馏试验和水冲洗操作，证明了超疏水NS-NF杂化膜的优异长期性能，截留率为99.8±0.13%，平均水通量为29.6±0.19LHM . 这些结果代表了通过解决稳定性和污染物问题来促进 MD 技术工业发展的宝贵证据。