| abstract |
A process for the production of porous polymer ultrafiltration or microfiltration membranes including Halar (poly (ethylene chlorotrifluoroethylene)) and related compounds to avoid the use of toxic solvents. Preferred solvents, coatings and pore formers are citric acid ethyl ester or glycerol triacetate. The membrane may be in the form of hollow fibers or flat sheets and may include other materials for controlling the properties of the membrane, such as hydrophilic / hydrophobic balance. Leaching agents may be introduced into the membrane. |