Method for making uniform polyvinylidene difluoride membranes

摘要

A method is provided for enhancing the characteristics of a hydrophobic polyvinylidene difluoride membrane which comprises heating the membrane to a temperature of at least 80 DEG C. but less than the temperature at which the membrane softens and deforms for a time sufficient to achieve a state such that, when the membrane is subsequently hydrophilized, the membrane has substantially uniform hydrophilic properties.