A modified polyamide nanofiltration membrane of methiocarb and a preparation method and application thereof
By introducing fenitrothion as an aqueous phase additive during the interfacial polymerization process, a fenitrothion-modified polyamide nanofiltration membrane was prepared. This solved the problem of sacrificing water flux when improving the rejection rate of traditional nanofiltration membranes, achieving a synergistic improvement in water flux and rejection rate, as well as enhanced antifouling performance, making it suitable for water treatment and desalination.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- NORTH CHINA ELECTRIC POWER UNIV
- Filing Date
- 2026-06-16
- Publication Date
- 2026-07-17
AI Technical Summary
Traditional polyamide nanofiltration membranes often sacrifice water flux when improving retention rate, and their antifouling ability and long-term operational stability are insufficient, resulting in bottlenecks in practical applications.
The preparation method of polyamide nanofiltration membrane modified with pyridinium involves introducing pyridinium as an aqueous phase additive during the interfacial polymerization process. By utilizing its dicarboxylic acid sulfide group to covalently crosslink with pyromellitic tricarboxylic acid chloride, the diffusion rate of piperazine is controlled, forming a uniform crosslinked separation layer, thereby enhancing the hydrophilicity and antifouling ability of the membrane.
It significantly improves water flux and salt rejection rate, enhances the membrane's antifouling performance and long-term operational stability, breaks the traditional nanofiltration membrane permeability-selectivity trade-off effect, and provides a new type of membrane material that combines high flux and high selectivity.
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Figure CN122399600A_ABST