Abstract
Polyethersulfone with cardo (PES-C) was an engineering thermoplastic and membrane material with high glass transition temperature. According to the result of solubility parameter difference, the effects of polyethylene glycol (PEG) on polymer precipitation curves in the triangle phase diagram, casting solution viscosity and rate of gelation were studied by methods of titration, viscometer and gelation kinetics experiment. PES-C ultrafiltration membranes were prepared by phase inversion method using N-methylpyrrolidone (NMP) as solvent and PEG as additive. The effects of PEG on the performance and structure of membrane were investigated. Experimental results showed that the addition of PEG reduced the solvency of solvent for polymer from the phase diagram. Increase of PEG concentration led to the increase of casting solution viscosity, the gelation rate slowed down, the solute rejection increased and the pure water flux decreased.
| Original language | English |
|---|---|
| Pages (from-to) | 82-86 |
| Number of pages | 5 |
| Journal | Beijing Ligong Daxue Xuebao/Transaction of Beijing Institute of Technology |
| Volume | 27 |
| Issue number | 1 |
| Publication status | Published - Jan 2007 |
Keywords
- Membrane forming system
- Membrane performance and structure
- Polyethersulfone with cardo
- Polyethylene glycol