Recent Progress in Electrospun Nanofibers for the Membrane Distillation of Hypersaline Wastewaters  

作　　者：Di Xu Zhigao Zhu Jiansheng Li 

机构地区：[1]Key Laboratory of New Membrane Materials,Ministry of Industry and Information Technology,School of Environmental and Biological Engineering,Nanjing University of Science and Technology,Nanjing 210094,China

出　　处：《Advanced Fiber Materials》2022年第6期1357-1374,共18页先进纤维材料（英文）

基　　金：The authors gratefully acknowledge the National Natural Science Foundation of China(No.52000105);the Natural Science Foundation of Jiangsu Province(No.BK20200478);the Fundamental Research Funds for the Central Universities(No.30922010806).

摘　　要：Membrane distillation(MD)utilizing low-grade thermal energy can be used to effectively desalinate hypersaline brines with a high freshwater recovery for water reuse.Membrane flux and durability are the two main indices used to evaluate MD membrane performance.In the past decade,electrospun nanofibrous distillation membranes(EFDMs)with a low mass transfer resistance have garnered increasing attention in MD research,owing to their high porosity and interconnected-pore structure.However,on the one hand,the pores of EFDMs compared to those of phase-inversion membranes are easily deformed and impacted by water flow,reducing membrane flux;on the other hand,the general hydrophobic interface is susceptible to being wetted,fouled and scaled during the desalination/concentration process,resulting in MD failure.This review will present a comprehensive discussion of the recent progress in electrospun nanofibers for the MD of hypersaline wastewaters with a focus on designing specially wettable membrane interfaces and welding-pore structured membranes to enhance MD distillation efficiency and durability simultaneously.Besides,the challenges and perspectives of MD in treating hypersaline wastewaters are also provided as a guide for future research on sustainable and clean freshwater recovery.

关 键 词：ELECTROSPINNING Membrane distillation Flux and durability Wetting fouling and scaling control Pore deformation 

分 类 号：TB383[一般工业技术—材料科学与工程]