Membrane materials are the core of membrane separation technology, but currently commonly used polymer membranes still have problems such as low separation performance and vulnerability to pollution. This project belongs to the field of membrane separation and aims at key technical and theoretical issues of separation membranes, including the regulation of membrane structure and performance, optimization of membrane preparation processes and research on membrane mass transfer mechanisms. The main research results are as follows: 1. A series of high-efficiency water treatment separation membranes have been developed. Design and utilize a variety of inorganic nanomaterials and organic functional molecules with unique properties and structures to build effective molecular mass transfer channels, improve interface structures, optimize surface properties, and establish structure-activity relationships between nanomaterials and functional molecules and membrane structure and properties., achieving precise control of membrane structure and performance. On the basis of maintaining the original interception performance, the prepared water treatment membrane's permeability is improved by 2-6 times, greatly improving the separation ability and anti-pollution ability of the water treatment membrane. 2. A new universal composite membrane preparation process has been developed. The preparation process optimizes the existing interfacial polymerization process and proposes a new concept of two-step interfacial polymerization. While the permeability rate of the membrane is doubled, the salt retention level is also improved, breaking through the mutual constraints of membrane permeability and selectivity. bottleneck. When applied to the preparation of organic-inorganic composite membranes, it can effectively solve the problem of loading inorganic nanomaterials in polymer membranes, and the separation performance of the membranes is further significantly enhanced, providing high-performance and multi-functionality of organic-inorganic composite membranes. New approach. 3. The transport and separation mechanism of molecules in the membrane was revealed. By combining Fourier transform infrared spectroscopy with two-dimensional correlation analysis technology, by tracking the transport and separation process of molecules in the membrane in situ, the interaction relationship between the molecules of the transported substance and each component in the membrane is analyzed from the molecular level, and a new model of membrane mass transfer and separation provides important theoretical guidance for the preparation of efficient separation membranes. The above research results have played a strong role in promoting the development of high-efficiency separation membranes and have good application prospects. The results of this project have received widespread attention and reference. Eight representative works have received a total of 527 citations from SCI, and a single article has a maximum of 109 citations. It has been authorized to have 9 China invention patents, including 1 technology transfer. Based on this project, the first person to complete the project has won many honors such as the First New Century Talent Program of the Ministry of Education, the Shanghai City Outstanding Subject Leaders Program, a Fellow of the Royal Society of Chemistry (RSC), and the Dow Innovation Challenge Award.