Nanofiltration (NF) is an advanced environmental technology in water treatment. To thin film nanocomposite (TFN) membrane, good compatibility between nanofillers and polyamide (PA) layer is the guarantee of remarkable performance. Herein, tannic acid (TA) was employed as modifier of UIO-66-NH₂ prior to the interfacial polymerization (IP). With TA modification, more interaction can be formed so that the compatibility between nanofillers and PA layer can be promoted at the molecular level. Characterizations demonstrated the coating of TA on UIO-66-NH₂, together with successful introducing of nanofillers in TFN membranes. Compared to pristine thin film composite (TFC) membrane, both UIO-incorporated TFN (TFN-U) and TA modified UIO-incorporated TFN (TFN-TU) membranes showed higher permeance (111.2% and 93% enhancement, respectively). However, under the same nanofillers dose, TFN-TU exhibited slightly lower permeance and higher rejection than TFN-U since the bridging effect of TA healed non-selective voids in skin layer. With the increasing of nanofiller dose in IP, TFN-TU remained reasonable selectivity while TFN-U failed to. Moreover, TFN-TU showed better anti-fouling property due to TA modification. Introducing TA modified MOFs into IP can serve as an ingenious strategy for TFN membrane to achieve high-quality environmental applications.

纳滤（NF）是水处理领域的一项先进的环保技术。对于薄膜纳米复合材料（TFN）膜，纳米填料与聚酰胺（PA）层之间的良好相容性是卓越性能的保证。在此，在界面聚合（IP）之前，将鞣酸（TA）用作UIO-66-NH _2的改性剂。通过TA改性，可以形成更多的相互作用，从而可以在分子水平上促进纳米填料和PA层之间的相容性。表征表明TA在UIO-66-NH ₂上的涂层，以及在TFN膜中成功引入纳米填料。与原始薄膜复合（TFC）膜相比，掺入UIO的TFN（TFN-U）和TA改性掺入UIO的TFN（TFN-TU）膜均显示出更高的渗透性（分别提高111.2％和93％）。然而，在相同的纳米填料剂量下，TFN-TU的渗透性和排阻性均比TFN-U略低，因为TA的桥接作用可以治愈皮肤层中的非选择性空隙。随着IP中纳米填料剂量的增加，TFN-TU仍保持合理的选择性，而TFN-U却没有。此外，由于TA改性，TFN-TU显示出更好的防污性能。将TA修饰的MOF引入IP可以作为TFN膜实现高质量环境应用的巧妙策略。