A dual-molecule modified graphene-based ion-selective membrane, and a preparation method and application thereof
By leveraging the synergistic effect of dioctadecyl dimethyl ammonium bromide with sodium polyacrylate and graphene oxide, the problems of insufficient permeability and selectivity in existing ion-selective membranes have been solved, resulting in an ion-selective membrane with high permeability and low resistance, suitable for salinity gradient power generation devices.
CN117427500BActive Publication Date: 2026-05-19UNIV OF JINAN
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Patent Information
- Application Number
- CN202311292713.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2023-10-08
- Publication Date
- 2026-05-19
- Estimated Expiration
- 2043-10-08
AI Technical Summary
Technical Problem
Existing ion-selective membranes have shortcomings in improving ion permeability and selectivity, especially due to the increased friction caused by the hydrophilicity of polyelectrolytes, which reduces membrane performance.
Method used
By employing the synergistic effect of dioctadecyldimethylammonium bromide with sodium polyacrylate and graphene oxide, nanochannels are modified through electrostatic interactions and hydrophobic modification to reduce ion transport friction and improve permeability and selectivity.
Benefits of technology
It achieves high permeability and low resistance of ion-selective membranes, enhances the mechanical strength and stability of the membranes, and is suitable for salinity gradient power generation devices.
✦ Generated by Eureka AI based on patent content.
Abstract
The application discloses a kind of amphiphilic molecule modified graphene-based ion selective membrane and its preparation method and application.The application is sequentially poured into alkaline graphene oxide aqueous solution with the cationic surfactant aqueous solution containing N(CH3)2 + And the aqueous solution containing-COO ‑ Of polymer, after being mixed uniformly, membrane is extracted into film, the film is dried and annealed, and the amphiphilic molecule modified graphene-based ion selective membrane is obtained.In the application, due to the electrostatic interaction between the N(CH3)2 + Region of the polar head of dioctadecyldimethylammonium bromide and-COO ‑ Of sodium polyacrylate, the ion selective membrane shows good ion selective performance.The ion selective membrane exhibits stable power generation performance by the synergistic effect of dioctadecyldimethylammonium bromide, sodium polyacrylate and graphene oxide.
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