| abstract |
In order to remove dissolved oxygen from the fuel, a method for preventing migration, ie penetration of fuel into microporous polymer membranes, such as those used in aircraft fuel deoxygenation units, requires the size of the micropores in the membrane from the first size. Heat treating the membrane to reduce to a second size, the second size being large enough to allow migration of oxygen through the membrane and small to prevent migration of fuel into the membrane. The film is an amorphous fluoropolymer on a PVDF substrate and the micropores are reduced in size by heat treatment for 2 hours at a temperature between 130 ° C. and 150 ° C. |