Performance of thin film nanocomposite (TFN) membranes can be enhanced by intercalation of nanofillers with special wettability and surface charge in the thin film layer. Properties of the nanofillers have great influence on the interfacial polymerization of polyamide. In this study, nano-porous zeolitic imidazolate framework-8 (ZIF-8) crystals were dispersed in amine monomer (piperazine) solution and intercalated in the polymeric thin film layer. Structure and surface property of the polyamide layer were changed by adding this hydrophobic and negative charged ZIF-8, which was identified by attenuated total reflectance infrared, scanning electron microscope, X-ray photoelectron spectroscopy, atomic force microscopy and water contact angle measurement. The TFN membranes containing ZIF-8 showed a water flux high to 55 L/m² h with Na₂SO₄ rejection higher than 95% at 0.6 MPa. Moreover, this high performance remained stable for long-term testing during 36 h and even temperature reaching to 70 °C.

通过在薄膜层中插入具有特殊润湿性和表面电荷的纳米填料，可以提高薄膜纳米复合材料（TFN）膜的性能。纳米填料的性质对聚酰胺的界面聚合有很大的影响。在这项研究中，将纳米孔型咪唑沸石骨架8（ZIF-8）晶体分散在胺单体（哌嗪）溶液中，并插入聚合物薄膜层中。通过添加这种疏水且带负电荷的ZIF-8改变聚酰胺层的结构和表面性能，该ZIF-8通过衰减的全反射红外，扫描电子显微镜，X射线光电子能谱，原子力显微镜和水接触角测量来鉴定。含有ZIF-8的TFN膜的水通量高达55 L / m ²h，Na ₂ SO ₄截留率在0.6 MPa时高于95％。而且，这种高性能对于36小时甚至温度达到70°C的长期测试仍保持稳定。