homemade membranes

[Loster]

[eco]

What you guys think about the MEMBRANES???

[kevinsatterfield]

is it possible to soak teflon in sulfiric acid (i think) and let it dry or compress it out into thin layers and then let it dr to get a nafion type membrane?what ever acid properties nafion has i cant remember but does an idea like that sound possible?

[thrival]

Sorry for getting off-topic.

I spoke with a guy at Permapure last year. (They hold the patent for nafion.) Apparently for some engineering reason and the properties of the material itself, they only manufacture it as tubing. It passes liquid water outside itself while the gases are conveyed thru the tubes. Not sure how that feature works with what you're trying to do.

[Loster]

bahr.

[kevinsatterfield]

i beg to differ thrival, DUPONT here in nashville sells nafion in sheets.they use nafion as an ionic membrane in thier fuel cells.nafion is nothing more than teflon with some acid propperties cant remember the acid but will ask again.the acid propperties allow the CURRENT to flow through the teflon based membrane.I was just wandering about soaking teflon in whatever acid it is and ...ahhh its probably not possible the way im wanting to try

[thrival]

[kevinsatterfield]

nafion from dupont is expensive.i think its like $80 a square foot.i do have easier access to ss with only teflon inner linning tubbing.teflon wont allow the current to pass through which reminds me i need to edit my last post on this topic

[thrival]

[kevinsatterfield]

i'll be looking for that patent info.

[kevinsatterfield]

patent # 6,902,849B2

[thrival]

Kevinsatterfield:

Cool.

I read the patent, they make it sound complicated and beyond the reach of kitchen chemists.

OK, they say gamma rays or ions in really high dose rates, in a vacuum. A microwave oven can fit into a large plastic trash bag, the air evacuated by vacuum cleaner. I wonder then, if just nuking some teflon or polyethylene sheet in the microwave, followed by immersion in sulfuric acid, might work. If I'm not mistaken, electrons do free radical damage, possibly creating the "micropores" talked about. If the material takes on an aged or yellowed appearance throughout, maybe what we're after. Thin sheets sandwiched together shouldn't be a problem. Plastic milk jugs are PE.

Just occurred to me, a microwave oven in a vacuum has no air moving through the fan to cool the magnetron. Could overheat, burn out.

[kevinsatterfield]

[adam666]

[eco]