Poly(β-ketoenamine)membranes with interconnected microporosity for high-performance fluid separationsOA
Thin-film composite(TFC)membranes fabricated via interfacial polymerization are a pivotal enabler for energy-efficient fluid separations.However,achieving both a high separation efficiency and solvent stability is challenging,as it requires the critical and precise tuning of the film microporosity and internal molecular interactions.Here,we present a molecular linkage engineering approach to designing high-microporosity and structurally rigid poly(β-ketoenamine)membranes.By integrating a three-dimensional(3D)shape-persistent triptycene scaffold(2,6,14-triaminotriptycene,TAT)and a hydroxyl-pendant trialdehyde linker(1,3,5-triformylphloroglucinol,Tp),the resultant TAT-Tp membranes exhibit an extraordinary surface area of 620.21 m^(2)·g^(-1),far exceeding those of traditional polyamide and polyimine counterparts.The high density ofβ-ketoenamine linkages promotes the creation of intra-and intermolecular hydrogen-bonding networks,thereby imparting remarkable structural stability and inducing ordered local regions.These improved structural attributes,coupled with high microporosity,endow these membranes with dual-function superiority:99.1%desalination efficiency and 99.2%methyl orange rejection in methanol.Furthermore,the membranes exhibit a remarkable solvent resistance,retaining structural integrity after 30-d exposure to diverse solvents.Experiments and simulations reveal the critical role of substantially interconnected ultramicroporous voids within the rigid crosslinked networks in achieving this superior performance.This work provides a framework for engineering resilient poly(β-ketoenamine)TFC membranes for high-efficient multitasking fluid separations.
Binyu Zhou;Guishan Hu;Yubo Cui;Miaomiao Tian;Xueli Cao;Shi-Peng Sun;Jingwei Hou;Yatao Zhang;Bart Van der Bruggen;Junyong Zhu
School of Chemical Engineering,Zhengzhou University,Zhengzhou 450001,ChinaSchool of Chemical Engineering,Zhengzhou University,Zhengzhou 450001,ChinaSchool of Chemical Engineering,Zhengzhou University,Zhengzhou 450001,ChinaSchool of Ecology and Environment,Zhengzhou University,Zhengzhou 450001,ChinaState Key Laboratory of Materials-Oriented Chemical Engineering,National Engineering Research Center for Special Separation Membranes,Jiangsu National Synergetic Innovation Center for Advanced Materials,College of Chemical Engineering,Nanjing Tech University,Nanjing 211816,China NJTECH University Suzhou Future Membrane Technology Innovation Center,Suzhou 215100,ChinaState Key Laboratory of Materials-Oriented Chemical Engineering,National Engineering Research Center for Special Separation Membranes,Jiangsu National Synergetic Innovation Center for Advanced Materials,College of Chemical Engineering,Nanjing Tech University,Nanjing 211816,China NJTECH University Suzhou Future Membrane Technology Innovation Center,Suzhou 215100,ChinaSchool of Chemical Engineering,The University of Queensland,St Lucia,QLD 4072,AustraliaSchool of Chemical Engineering,Zhengzhou University,Zhengzhou 450001,ChinaDepartment of Chemical Engineering,KU Leuven,Celestijnenlaan 200F,B-3001 Leuven,BelgiumSchool of Chemical Engineering,Zhengzhou University,Zhengzhou 450001,China
化学化工
poly(β-ketoenamine)membranetriptyceneinterfacial confined growththin-film compositedesalinationorganic solvent nanofiltration(OSN)
《Nano Research》 2026 (5)
P.1077-1089,13
supported by the National Natural Science Foundation of China(Nos.92475120 and 52573238)the Outstanding Youth Fund of Henan Scientific Committee(No.252300421182)Jiangsu Future Membrane Technology Innovation Center(No.BM2021804)。
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