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Palladium composite membranes were synthesized using the supercritical impregnation method in order to reduce their methanol permeation properties in direct methanol fuel cells. Pd(II)(acetylacetonate) 2 was dissolved in supercritical CO 2 and impregnated into the Nafion membranes. The impregnated Nafion membranes were converted to the palladium deposited Nafion membranes by treating...
Grafting of styrene on to Nafion membranes is carried out by impregnation and radical polymerization in supercritical carbon dioxide (scCO 2 ) as a solvent and swelling agent. Styrene monomer and the initiator 2,2'-azoisobutyronitrile (AIBN) are first impregnated into Nafion membranes using scCO 2 at 38 o C and 25MPa. After releasing CO 2 , the polymerization is carried...
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