| abstract |
A method for preparing a polymer membrane using an environmentally friendly diluent, which involves using an ionic liquid as a diluent and using a thermally induced phase separation method to prepare a polymer porous membrane. The steps are as follows: add a mass percentage of 15 to 70 wt% polymer and 85-30 wt% ionic liquid are used as diluents, stirred and heated to raise the temperature and left to stand for defoaming or mixed with a twin-screw extruder to make a polymer homogeneous casting film liquid ;Scrape the casting solution into a flat plate or spin it into a hollow fiber through a spinneret, then immerse it in a cooling liquid to quench and solidify to form a film; immerse the formed film in an extractant to extract the diluent ionic liquid , and the polymer porous membrane is obtained after drying. The invention is characterized in that the polymer porous membrane is prepared by using the ionic liquid as a diluent, the preparation process is simple, the process is green and environmentally friendly, and the prepared polymer membrane has large flux, high strength and good mechanical properties. |