一种正渗透膜及其制备方法和应用
By introducing an EVOH-GA intermediate layer into the forward osmosis membrane, the stability and lifespan issues of traditional forward osmosis membranes in acidic environments were solved, resulting in a forward osmosis membrane with excellent acid resistance, which improved water flux and ion rejection rate.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- TIANJIN JUYI CONSTR ENG CO LTD
- Filing Date
- 2026-06-16
- Publication Date
- 2026-07-17
AI Technical Summary
Existing forward osmosis membranes have poor stability and short service life in acidic environments, making it difficult to meet the needs of acidic wastewater treatment in the phosphorus chemical industry.
A hydrophilic intermediate layer formed by crosslinking ethylene-vinyl alcohol copolymer and glutaraldehyde is introduced between the base membrane layer and the separation layer. A stable chemical crosslinking structure is formed through interfacial polymerization, thus preparing a forward osmosis membrane with high selectivity, high water permeability and excellent acid resistance.
It significantly improves the structural stability and acid resistance of the membrane, effectively avoids interlayer delamination and hydrolysis problems, increases water flux and ion rejection rate, and extends the service life of the membrane.
Smart Images
Figure CN122399592A_ABST