A practical, high-productive and superhydrophobic nanofibrous membrane was firstly introduced for membrane distillation (MD) process using poly (methyl methacrylate) (PMMA) and the electroblowing process. Wrinkled PMMA nanofibers demonstrated nano/micro-structure improving hydrophobicity greatly. Direct contact membrane distillation (DCMD) performance of the cold-pressed nanofibrous PMMA membrane was assessed using 35 and 150 g/L saline feed waters for 24 h and the results were compared with commercial polytetrafluoroethylene (PTFE) and polypropylene (PP) membranes. The PMMA membrane exhibited highest permeate flux (41.04 and 35.94 kg/m² h for 35 and 150 g/L feeds, respectively) with stable electrical conductivity (EC) (˂ 5 μS/cm) resulting from superhydrophobicity (164.2°) and high liquid entry pressure (LEP) of 227.3 kPa. Although the commercial membranes presented good DCMD performance for 35 g/L feed, partial pore wetting with final EC of 11.93 and 17.62 μS/cm was measured for the PTFE and PP membranes using 150 g/L feed, respectively. The nanofibrous PMMA membrane is a promising applicant for conducting promising desalination using the DCMD process considering high production rate, simplicity of fabrication process and cost-effectiveness.

首先介绍了一种实用，高产且超疏水的纳米纤维膜，该膜用于使用聚甲基丙烯酸甲酯（PMMA）的膜蒸馏（MD）和电吹工艺。皱纹的PMMA纳米纤维表现出极大的纳米/微结构，可改善疏水性。使用35 g / L和150 g / L的盐水进水24 h评估了冷压纳米纤维PMMA膜的直接接触膜蒸馏（DCMD）性能，并将其与商用聚四氟乙烯（PTFE）和聚丙烯（PP）膜进行了比较。PMMA膜表现出最高的通量（41.04和35.94 kg / m ² h分别适用于35和150 g / L的进料，具有超疏水性（164.2°）和227.3 kPa的高液体进入压力（LEP），具有稳定的电导率（EC）（˂5μS/ cm）。尽管商用膜对35 g / L进料具有良好的DCMD性能，但使用150 g / L进料分别测量了PTFE和PP膜的部分孔润湿，最终EC为11.93和17.62μS/ cm。考虑到高生产率，制造工艺的简单性和成本效益，纳米纤维PMMA膜是使用DCMD工艺进行有希望的脱盐的有希望的申请人。