Related Experiment Video
Updated: Jun 2, 2025
10:19
Three-Dimensionally Printed Microfluidic Cross-flow System for Ultrafiltration/Nanofiltration Membrane Performance Testing
Published on: February 13, 2016
11.2K
Modeling and optimization of surface modification process of ultrafiltration membranes by guanidine-based deep
Foad Gholami1, Azar Asadi2, Mina Dolatshah3
1Environmental Group, Energy Department, Materials and Energy Research Centre, Alborz, Iran.
Heliyon
|January 15, 2025
Summary
This study enhances Polyetherimide (PEI) membranes using a deep eutectic solvent (DES) for improved performance and reduced fouling. The optimized DES-modified PEI membrane shows superior antibiotic separation capabilities.
Area of Science:
- Materials Science
- Chemical Engineering
- Membrane Technology
Background:
- Polyetherimide (PEI) membranes suffer from low performance and high fouling, limiting their commercial use.
- Surface modification is crucial for enhancing membrane properties.
- Deep eutectic solvents (DES) offer a sustainable approach for membrane modification.
Purpose of the Study:
- To modify PEI membrane surfaces using a DES for improved efficiency and antifouling properties.
- To optimize the DES modification conditions using Response Surface Methodology (RSM).
- To evaluate the performance of the modified membrane in antibiotic separation.
Main Methods:
- PEI membrane surface modification using a choline/guanidine (Ch/Gu) DES.
- Optimization of modification parameters (Ch/Gu ratio, time) via RSM.
- Characterization of membrane properties and filtration performance evaluation.
- Antibiotic (penicillin, cephalexin) rejection tests.
Main Results:
- Optimal modification achieved at 0.8 Ch/Gu ratio and 30h.
- The DES-modified PEI membrane exhibited significantly enhanced pure water flux (PWF) and flux recovery ratio (FRR).
- Antibiotic rejection exceeded 95% for the modified membrane, compared to ~63% for the bare membrane.
- Stable long-term performance in dead-end and cross-flow filtration.
Conclusions:
- DES modification effectively enhances PEI membrane performance and antifouling characteristics.
- The optimized DES-PEI membrane is suitable for eco-friendly and cost-effective antibiotic separation.
- DES presents a promising strategy for advanced membrane applications.
Related Concept Videos
01:18Detergent Purification of Membrane Proteins
5.1K
Detergents are used to purify the integral proteins of the membrane. The hydrophobic portion of the detergent can replace membrane phospholipids while solubilizing the membrane proteins. When detergent monomers reach a specific concentration in a solution called critical micelle concentration (CMC), they form micelles. Above CMC, the concentration of the detergent monomers remains in equilibrium with the micelle. The number of detergent monomers present in the CMC varies for each detergent, and...
5.1K
01:15Dialysis
582
Dialysis is a diffusion-based purification process that separates analyte molecules from a complex matrix. This is accomplished by allowing molecules in the solution to pass through a semipermeable membrane into a liquid on the other side. The membrane is usually made of cellulose acetate or cellulose nitrate, and the second liquid must be miscible with the solution. Ions (e.g., chloride or sodium) or organic molecules (e.g., glucose) can pass through the membrane pores, which generally have...
582