Polyester-amide (PEA) thin film composite (TFC) NF membranes have rapidly evolved towards a competitive performance, benefiting from their remarkable antifouling capability and superior chlorine resistance. In this report, a new concept of synergistic interfacial polymerization is explored, which promptly triggers the reaction between hydramines and trimesoyl chloride (TMC) in the presence of a trace amount of diamines. This rapid-start mode enables the formation of defect-free PEA films without the requirement of catalysis. A comprehensive characterization of physicochemical properties using high-resolution mass spectrometer (HRMS) reveals that the recombination and formation of a “hydramine-diamine” coupling unit plays a decisive role in activating the synergistic interfacial polymerization reaction with TMC molecules. Taking the pair of serinol and piperazine (PIP) as an example, the PEA-NF membrane fabricated with 0.1 w/v% serinol mixed with 0.04 w/v% PIP as water-soluble monomer and 0.1 w/v% TMC as oil phase monomer was found to have a pure water permeability (PWP) of 18.5 L·m−2·h−1·bar−1 and a MgSO4 rejection of 95.5 %, which surpasses almost all the reported PEA NF membranes. Findings of the current research provide more possibilities for the low-cost and rapid synthesis of high-performance PEA membranes aiming for water purification.

中文翻译：

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海胺/二胺与均苯三甲酰氯之间的协同界面聚合：纳滤膜制备的新反应


聚酯酰胺（PEA）薄膜复合（TFC）纳滤膜凭借其卓越的防污能力和优异的耐氯性，已迅速发展为具有竞争力的性能。在该报告中，探索了协同界面聚合的新概念，该概念在微量二胺存在下迅速引发羟胺和均苯三甲酰氯（TMC）之间的反应。这种快速启动模式无需催化即可形成无缺陷的 PEA 薄膜。使用高分辨率质谱仪（HRMS）对物理化学性质的全面表征表明，“羟胺-二胺”偶联单元的重组和形成在激活与TMC分子的协同界面聚合反应中起着决定性作用。以丝氨醇和哌嗪对(PIP)为例，以0.1 w/v%丝氨醇与0.04 w/v% PIP作为水溶性单体和0.1 w/v% TMC作为油相混合制备PEA-NF膜研究发现该单体的纯水渗透率（PWP）为18.5 L·m−2·h−1·bar−1，MgSO4截留率为95.5%，超过了几乎所有报道的PEA NF膜。目前的研究结果为低成本、快速合成用于水净化的高性能PEA膜提供了更多可能性。