Highly permeable reverse osmosis membranes incorporated with hydrophilic polymers of intrinsic microporosity via interfacial polymerization
Highly permeable reverse osmosis membranes incorporated with hydrophilic polymers of intrinsic microporosity via interfacial polymerization作者机构:Engineering Research Center of Membrane and Water Treatment of MOECollege of Chemical&Biological EngineeringZhejiang UniversityHangzhou 310027China Research Institute of NingboZhejiang UniversityNingbo 315100China Xi’an High-Tech InstituteXi’an 710025China
出 版 物:《Chinese Journal of Chemical Engineering》 (中国化学工程学报(英文版))
年 卷 期:2022年第35卷第5期
页 面:194-202页
核心收录:
学科分类:080706[工学-化工过程机械] 08[工学] 0807[工学-动力工程及工程热物理]
基 金:supported by Zhejiang Provincial Natural Science Foundation of China (LZ20B060001) National Natural Science Foundation of China (22008208&21908192) China Postdoctoral Science Foundation (2019TQ0276)
主 题:PIM-1 Intrinsic microporosity Reverse osmosis Interfacial polymerization Trade-off
摘 要:Enhancing the water permeation while maintaining high salt rejection of existing reverse osmosis(RO)membranes remains a considerable ***,we proposed to introduce polymer of intrinsic microporosity,PIM-1,into the selective layer of reverse osmosis membranes to break the trade-off effect between permeability and selectivity.A water-soluble a-LPIM-1 of low-molecular-weight and hydroxyl terminals was *** designed characteristics endowed it with high solubility and *** it was mixed with m-phenylenediamine and together served as aqueous monomer to react with organic monomer of trimesoyl chloride via interfacial *** characterization results exhibited that more“nodulerather than“leafstructure formed on RO membrane surface,which indicated that the introduction of the high free-volume of a-LPIM-1 with three dimensional twisted and folded structure into the selective layer effectively caused the frustrated packing between polymer *** virtue of this effect,even with reduced surface roughness and unchanged layer thickness,the water permeability of prepared reverse osmosis membranes increased 2.1 times to 62.8 L·m^(-2)·h^(-1) with acceptable Na Cl rejection of 97.6%.This attempt developed a new strategy to break the trade-off effect faced by traditional polyamide reverse osmosis membranes.