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High-Flux Solvent-Resistant Reverse Osmosis Membrane Enabled by D-glucamine Surface Modification.
Bing Wang1, Weijia Song1, Yuqi Sun1
1Key Laboratory of Marine Chemistry Theory and Technology (Ocean University of China), Ministry of Education/College of Chemistry & Chemical Engineering, Ocean University of China, 238 Songling Road, Qingdao 266100, China.
Membranes
|May 26, 2026
Summary
Surface modification with D-glucamine enhances organic solvent reverse osmosis (OSRO) membranes. The improved OSRO membranes show high permeance, stability, and solvent tolerance for green chemical separations.
Area of Science:
- Membrane Science and Technology
- Green Chemistry
- Separation Processes
Background:
- Organic solvent reverse osmosis (OSRO) is a promising low-energy technology for separating organic mixtures.
- Developing OSRO membranes with high permeance and stability is a significant challenge.
Purpose of the Study:
- To develop a surface modification strategy for crosslinked polyimide-supported polyamide OSRO membranes.
- To improve membrane performance and stability using D-glucamine.
Main Methods:
- Surface modification of polyamide membranes using a D-glucamine/ethanol solution.
- Characterization of membrane hydrophilicity via water contact angle measurements.
- Evaluation of membrane performance in terms of permeance, salt rejection, and solvent stability.
Main Results:
- Optimized membrane (TFC-D-0.2) showed enhanced hydrophilicity (water contact angle decreased from 52.6° to 36.6°).
- Achieved high water permeance (12.84 LMH/MPa) with 98.25% NaCl rejection and excellent pressure resistance (2.5–4.0 MPa).
- Demonstrated good solvent tolerance (>96.5% NaCl rejection after 30 days) and stable performance in concentrating ethyl cinnamate/ethanol mixtures (>88% solute rejection).
Conclusions:
- D-glucamine surface modification is an effective strategy for developing high-performance OSRO membranes.
- The modified membranes offer enhanced hydrophilicity, permeance, stability, and solvent tolerance.
- This approach holds potential for sustainable separation processes in the fine chemical industry.
