Abstract We successfully fabricated a kind of novel sandwich-like thin-film nanocomposite (TFN) polyamide (PA) membranes via interfacial polymerization (IP) method on polyimide (PI) support surface which was modified by a layer of nanosized amine-modified zeolitic imidazolate framework - 8 (mZIF-8) nanoparticles for organic solvent nanofiltration (OSN). Uniform distribution of the nanoparticles was obtained via directly immersing the PI support membrane in aqueous mZIF-8 suspension prior to the IP. A post-IP cross-linking procedure was conducted to enhance further the solvent resistance of the fabricated TFN OSN membranes. Ultra-smooth (average surface roughness of 13.7 nm) and ultra-thin (average thickness of about 33 nm) skin layer was achieved, together with high Rhodamine B (RDB, 479 Da) rejection (99.1%) and reasonable ethanol permeance (~28 L m−2 h−1 MPa−1), as well as nearly unchanged RDB rejection after being submerged in DMF at high temperature (80 °C) for 120 h, indicating their very good resistance in very harsh strong polar solvent circumstance and the promising aspect of their industrial application.

中文翻译：

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胺官能化的 ZIF-8 纳米粒子作为夹层用于提高有机溶剂纳滤 (OSN) 膜的分离性能

摘要 我们在聚酰亚胺 (PI) 载体表面通过界面聚合 (IP) 法成功制备了一种新型夹心状薄膜纳米复合 (TFN) 聚酰胺 (PA) 膜，该膜由一层纳米级胺改性沸石咪唑酯改性。框架 - 用于有机溶剂纳滤 (OSN) 的 8 个 (mZIF-8) 纳米颗粒。通过在 IP 之前将 PI 支持膜直接浸入 mZIF-8 水性悬浮液中，可以获得纳米颗粒的均匀分布。进行后 IP 交联程序以进一步提高制造的 TFN OSN 膜的耐溶剂性。实现了超光滑（平均表面粗糙度为 13.7 nm）和超薄（平均厚度约为 33 nm）的表层，以及高罗丹明 B（RDB，479 Da）排斥（99.