Three polyphenol-polyamine co-deposition systems containing different polyphenols (catechol (CA), gallic acid (GA) and tannic acid (TA)) and Polyethyleneimine (PEI) were established and used to construct adhesive layer on the surface of anion exchange membranes (AEMs). And graphene oxide (GO) was introduced into co-depositions to construct an antifouling modifying layer. The modified AEMs were characterized and applied in electrodialysis for antifouling experiments. The results showed that the TA-PEI-M with a large depositing amount exhibited more hydrophilic surface than those of CA-PEI-M and GA-PEI-M, but still low value in the negative charge density. The introduction of GO increased the negative charge density of membrane surface and endowed AEMs with enhanced antifouling ability significantly. Furthermore, GO-TA-PEI-M could maintain surface properties and antifouling performance after immersing in NaOH solutions, indicating good alkaline-stability. It was attributed to that the abundant phenolic groups in TA played a vital role in the formation of co-deposition layer. The abundant phenolic groups in TA could provide stronger adhesion and multiple reactive sites to generate more stable covalent structures with PEI. In addition, the hydrogel products produced by the electrostatic interaction of TA and PEI helped increase the depositing amount. This work proposed a novel approach to fabricate surface-modified antifouling AEMs with alkaline stability by polyphenol-polyamine co-deposition.

建立了三种包含不同多酚（邻苯二酚（CA），没食子酸（GA）和单宁酸（TA）和聚乙烯亚胺（PEI）的多酚-多胺共沉积体系，并用于在阴离子交换膜表面上构建粘合剂层（ AEMs）。然后将氧化石墨烯（GO）引入共沉积以构建防污改性层。表征了改性的AEM，并将其应用于电渗析实验中。结果表明，与CA-PEI-M和GA-PEI-M相比，具有较大沉积量的TA-PEI-M具有更亲水的表面，但负电荷密度值仍然较低。GO的引入增加了膜表面的负电荷密度，并赋予了AEM显着增强的防污能力。此外，GO-TA-PEI-M浸入NaOH溶液后可保持表面性质和防污性能，表明其具有良好的碱稳定性。这归因于TA中丰富的酚基在共沉积层的形成中起着至关重要的作用。TA中丰富的酚基可以提供更强的附着力和多个反应位点，从而与PEI生成更稳定的共价结构。另外，通过TA和PEI的静电相互作用产生的水凝胶产物有助于增加沉积量。这项工作提出了一种通过多酚-多胺共沉积制备具有碱稳定性的表面改性防污型AEM的新方法。这归因于TA中丰富的酚基在共沉积层的形成中起着至关重要的作用。TA中丰富的酚基可以提供更强的附着力和多个反应位点，从而与PEI生成更稳定的共价结构。另外，通过TA和PEI的静电相互作用产生的水凝胶产物有助于增加沉积量。这项工作提出了一种通过多酚-多胺共沉积制备具有碱稳定性的表面改性防污型AEM的新方法。这归因于TA中丰富的酚基在共沉积层的形成中起着至关重要的作用。TA中丰富的酚基可以提供更强的附着力和多个反应位点，从而与PEI生成更稳定的共价结构。另外，通过TA和PEI的静电相互作用产生的水凝胶产物有助于增加沉积量。这项工作提出了一种通过多酚-多胺共沉积制备具有碱稳定性的表面改性防污型AEM的新方法。TA和PEI的静电相互作用产生的水凝胶产物有助于增加沉积量。这项工作提出了一种通过多酚-多胺共沉积制备具有碱稳定性的表面改性防污型AEM的新方法。TA和PEI的静电相互作用产生的水凝胶产物有助于增加沉积量。这项工作提出了一种通过多酚-多胺共沉积制备具有碱稳定性的表面改性防污型AEM的新方法。