Preparation of high flux cellulose acetate membranes and hollow fibers from prefabricated low flux specimens

摘要

A method for preparing high flux cellulose acetate membranes and hollow fibers from prefabricated low flux specimens. Low flux, hollow fiber, and planar are annealed in a selected plasticizing medium for a period of time at a temperature characteristic of the chemical nature of the polymer and the plasticizer. The temperature is that at which the plasticizer will begin to selectively solvate the polymer and is referred to as the temperature of incipient porosity.