Cross-linked polyimide membranes for solvent resistant nanofiltration in aprotic solvents |
| |
Authors: | Katrien Vanherck Pieter Vandezande Steliana O Aldea Ivo FJ Vankelecom |
| |
Institution: | aCentre for Surface Chemistry and Catalysis, Faculty of Bioscience Engineering, Katholieke Universiteit Leuven, Kasteelpark Arenberg 23, Box 2461, B-3001 Leuven, Belgium |
| |
Abstract: | Solvent stable nanofiltration membranes were prepared through the chemical cross-linking of asymmetric Matrimid®-based polyimide membranes with p-xylylenediamine. The influence of this straightforward post-treatment on membrane stability, morphology and performance in dimethylformamide (DMF), N-methylpyrrolidinone (NMP), dimethylacetamide (DMAc) and dimethylsulfoxide (DMSO) was thoroughly investigated. With permeabilities up to 5.4 l/m2 bar h and rejections up to 98% for low molecular weight dyes in these demanding solvents, optimally performing, truly solvent resistant nanofiltration membranes were obtained. Nanozeolite-filled membranes were prepared in parallel to study the effect of an inorganic filler on the cross-linking reaction and performance in aprotic solvents. The outstanding stability and performance of these membranes and their easy preparation clearly offer vast potential for applications in harsh solvent environments. |
| |
Keywords: | Solvent resistant nanofiltration Polyimide Cross-linking Aprotic solvents Solvent stability |
本文献已被 ScienceDirect 等数据库收录! |
|