Advanced sulfonated polystyrene cation exchange membranes for high-salinity electrodialysis desalination
This technology is a method for fabricating sulfonated polystyrene ion-exchange membranes (IEMs) designed to maintain high charge selectivity in high salinity environments. Such membranes are suitable for applications in electrodialysis desalination and other electromembrane processes. Controlled synthesis parameters are used optimize the performance of the ion-exchange membranes (IEMs).
Unmet Need: Customized sulfonated polystyrene cation exchange membranes with high charge densities and low hydration degrees
The current challenge in the field of IEMs is that their selectivity diminishes in high salinity environments, such as ocean water. This loss of selectivity limits the effectiveness of existing, commercial IEMs in key applications, including electrodialysis desalination, the chloralkali process, and fuel cells. Existing IEMs struggle to maintain high permselectivity when faced with high salt concentrations, leading to inefficiencies in processes crucial for resource management and environmental sustainability. Addressing this shortfall is necessary as it directly impacts the feasibility and efficiency of desalination and other electromembrane processes, particularly in regions reliant on seawater as a primary water source.
The Technology: Advanced sulfonated polystyrene membranes for high salinity electrodialysis and electromembrane applications
This technology introduces sulfonated polystyrene IEMs specifically designed to have optimized performance in high salinity environments. The modular synthesis of the sulfonated polystyrene random copolymer allows for tailored membrane properties through controlled manipulation of synthesis time and reagent concentrations. Specific copolymer compositions and fabrication protocols have been identified that significantly improve the permselectivity and efficiency of IEMs with respect to existing commercial technologies.
Applications:
- Purification of drinking water from ocean water
- Optimized energy storage in fuel cells
- Research tool for separating highly concentrated solutes from one another
- Synthetic route for developing broad polymer types for use in IEMs
- Improved surface chemistry route for processors and semiconductors
Advantages:
- Enhanced performance in high-salinity environments
- Customizable membrane properties
- Improved resource management
- Cost-effective
Lead Inventor:
Patent Information:
Patent Pending
Related Publications:
Tech Ventures Reference:
IR CU23131
Licensing Contact: Dovina Qu