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Preparation of high flux polyethylene-based reverse osmosis membranes

Authors： DU Wenlin，REN Fengwei

Units： Jiangsu Aidemans New Materials Co., Ltd., Yangzhou 225800，China

KeyWords： polyethylene membrane；solvent activation；diazotization；reverse osmosis membrane

ClassificationCode：TQ051.893

year,volume(issue):pagination： 2025,45(2):100-108

Abstract：

In the past two years, water purifiers have shown a trend of large throughput product iteration, from 2 271 L/d to 4 542 L/d, and even 6 056 L/d. At present, the main way to improve water production is to increase the number of reverse osmosis (RO) membrane and enhance the power of the booster pump, but it is bound to bring about an increase in production costs and an increase in the volume of the water purifier. In this study, ultra-thin polyethylene (PE) membrane was used as the substrate to replace polysulfone non-woven fabric, and low pressure and high throughput PE-based reverse osmosis membrane (PERO) was prepared by simple solvent activation and diazotization post-treatment. Under the conditions of 0.41 MPa and 0.25 g/L NaC1, the flux of PERO membrane reached 110 L/(m2·h). and the desalting rate was about 97.5%. By choosing DMF solvent with appropriate activation strength, the residues and oligomers in the PA layer were dissolved to make the structure of the PA layer more porous. Then, the residual primary amine group in the polyamide layer was reacted to form diazo salt through diazotization, and the diazo salt group was then crosslinked with the residual aromatic amine group or the aromatic phenol group of the diazo saline solution to further improve the desalination rate of the reverse permeability membrane.

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AuthorIntro：

杜文林（1989-），男，湖南株洲人，硕士研究生，研究方向为反渗透及纳滤膜材料开发

Reference：

[1]陈子斌.家用净水器滤芯现状与发展[J].日用电器,2024,01：111-115.
[2]胡静,金素素.国内家用净水器的工艺分析与发展[J].日用电器,2023,1：95-98.
[3]邓雅静.净水膜产业：家用领域份额缩小,商用领域大展宏图[J].电器供应商情况,2023,12：6-7.
[4]曾敏炽.家用无泵无电纳滤净水器开发研究[D].成都：四川大学,2021.
[5]Park S, Kwon S J, Shin M G, et al. Polyethylene-supported high performance reverse osmosis membranes with enhanced mechanical and chemical durability[J]. Desalination,2018,436:28-38.
[6]Park S H, Kim Y J, Kwon S J, et al. Polyethylene battery separator as a porous support for thin film composite organic solvent nanofiltration membranes[J]. ACS Appl Mater Interf,2018,10(50):44050-44058.
[7]Kwon S J, Park S H, Park M S, et al. Highly permeable and mechanically durable forward osmosis membranes prepared using polyethylene lithium ion battery separators[J]. J Membr Sci, 2017,544:213-220.
[8]张翠苗,杜文林,卢彦斌,等.聚乙烯基材反渗透膜的制备及性能研究[J].膜科学与技术,2024，44（3）：57-66.
[9]张瑞君,苏松,高珊珊.聚酰胺复合膜后处理改性的技术进展与研究展望[J].膜科学与技术,2021,41(1):161-167.
[10]李佳聪.氯化对聚酰胺膜结构及耐污染性能影响的分子模拟研究[D].天津：天津理工大学, 2021.
[11]Shin M G, Park S H, Kwon S J,et al.Facile performance enhancement of reverse osmosis membranes via solvent activation with benzyl alcohol[J]. J Membr Sci,2019,578:220-229.
[12]王志,吴浩文,王纪孝.热处理前溶剂活化对芳香聚酰胺反渗透膜结构的影响机制[J].天津大学学报,2023,56(6):554-562.
[13]Smith M B. March高等有机化学——反应、机理与结构[M]//北京:化学工业出版社, 2018.
[14]刘宇鹏.基于亚硝酸处理对聚酰胺复合反渗透膜性能提升及修复研究[D]杭州：浙江理工大学,2023.
[15]Cadotte J E, Schmidt D L. Method of improving membrane properties via reaction of diazonium compounds or precursors[P].US4888116.1989-12-19.
[16]Abhishek R, Cieslinski C,Gerhart B, et al. Composite polymide membrane having preferred azo content[P].US 9555378.2017-01-13.
[17]Wang L, Yang H, Li H, et al. Diazotized polyamide membranes on commercial polyethylene textile with simultaneously improved water permeance, salt rejections and anti-fouling[J]. Desalination, 2023, 549: 116307.
[18]Song X, Gan B, Yang Z, et al. Confined nanobubbles shape the surface roughness structures of thin film composite polyamide desalination membranes[J]. J Membr Sci, 2019, 582: 342-349.

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