Incorporation of 3-dimensional lycopodium with hydrophobic nature and interconnected nano-channels into polyvinylidene fluoride membranes for desalination applications by vacuum membrane distillation  

作　　者：Saeed Seraj Toraj Mohammadi Maryam Ahmadzadeh Tofighy 

机构地区：[1]Center of Excellence for Membrane Research and Technology,Department of Chemical,Petroleum and Gas Engineering,Iran University of Science and Technology(IUST),Tehran,1684613114,Iran

出　　处：《Frontiers of Chemical Science and Engineering》2023年第9期1162-1182,共21页化学科学与工程前沿（英文版）

基　　金：Authors would like to thank Iran National Science Foundation(INSF)for supporting this study(Grant No.96008182).

摘　　要：In the present research,for the first time,lycopodium as a novel nanofiller was incorporated into a polyvinylidene fluoride matrix to fabricate lycopodium/polyvinylidene fluoride flat-sheet membrane for desalination applications by vacuum membrane distillation process.The prepared lycopodium/polyvinylidene fluoride membranes and lycopodium were characterized by field emission scanning electron microscopy,X-ray diffraction,Fourier transform infrared,energy dispersive X-ray,and mapping analyses.Water contact angle and liquid entry pressure measurements were also performed.Response surface methodology was applied to optimize membrane structure and performance.The optimized lycopodium/polyvinylidene fluoride membrane exhibits superior performance compared to the neat polyvinylidene fluoride membrane in terms of flux,salt rejection,water contact angle,and hydrophobicity.In vacuum membrane distillation experiments,using a 15000 ppm NaCl solution as a feed at 70℃,the neat polyvinylidene fluoride membrane,optimum membrane,and agglomerated membrane(with high lycopodium loading)demonstrated 3.80,25.20,and 14.83 LMH flux and 63.30%,99.99%,99.96%salt rejection,respectively.This improvement in flux and salt rejection of the optimized membrane was related to the presence of lycopodium with hydrophobic nature and interconnected nano-channels in membrane structure.It was found that lycopodium,as the most hydrophobic material,effectively influences the membrane performance and structure for membrane distillation applications.

关 键 词：LYCOPODIUM hoprobhobicity vucuum embrane distillation DESALINATION 

分 类 号：TQ051.893[化学工程] P747[天文地球—海洋科学]