膜科学与技术

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The influence of support on organic-inorganic composite
nanofiltration membranes

Authors： ZHANG Yuehua1,2, SUN Xiao1, CHEN Xianfu1, QIU Minghui1, FAN Yiqun1

Units： 1. State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, Nanjing 211816, China； 2. Qingyuan Innovation Laboratory, Quanzhou 362801， China

KeyWords： thin-film composite membrane; nanofiltration; ceramic membrane; antibiotic; interfacial polymerization

ClassificationCode：TQ051.893

year,volume(issue):pagination： 2025,45(3):78-87

Abstract：

Antibiotics, as a new type of pollutant, have been spread from pharmaceutical wastewater to natural water, posing a serious challenge to water conservation. Nanofiltration membranes with molecular weight cut-off of 200~2 000 is one of the most promising techniques for the removal of antibiotics from wastewater. Among them, the thin-film composite (TFC) membranes using ceramic membranes as support have attracted much attention in recent years due to their excellent stability and pressure resistance. However, the laws on how ceramic supports affect the polymerization process and the formation of separation layer is still uncleared. In this work, the ceramic membranes with different pore sizes of 500, 300，100, 20 and 5 nm was selected to investigate the important role of support. It was shown that the polyamide network structure prepared by appropriately increasing the pore size of ceramic support was relatively loose, resulting in the reduced transmission resistance and enhanced permeance. Secondly, the ceramic support with smoother surface and narrower pore size distribution is conductive to construct a complete and defective separation layer. Finally, the Al2O3 ceramic membrane with a pore size of 100 nm was preferred, and nanofiltration membranes with a pure water permeance of 141.2 L/（m2·h·MPa） and more than 98% rejection of tetracycline was prepared, showing prospects in the treatment of antibiotic wastewater.

Funds：

国家重点研发项目(2022YFB3805001); 清源创新实验室重大项目(00122003); 吉安市“揭榜挂帅”项目(pzzy-wtht-20220117014)

AuthorIntro：

张月华(1997-)，女，河南三门峡人，博士研究生，主要从事膜分离材料的研究与应用

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