filters PVDF or PTFE?

[trapattack369]

what is the difference and which is better for the home chemist?

[DOUBLE J]

I read a thread on this today. I have checked every board on my list for you and now I can't find it
The thread stated you needed the PVDF and that the other would clog much faster being the material it was made from.

I'm sure this was the response from a vet but my memory is toast these days.

I tried

[71olds442]

there is a post titled "titan filters" the pvdf are the ones to get.

[trapattack369]

Drenton touched on this here a few threads down "titan filters" but he really didnt go in depth, im wondering if the membrane was the problem or that titan sucks, and what the difference was in the 2 membranes

[DOUBLE J]

Brother I honestly don't know. I will have to let someone else field this one. Sorry

[UGAguy20]

Originally posted by trapattack369
Drenton touched on this here a few threads down "titan filters" but he really didnt go in depth, im wondering if the membrane was the problem or that titan sucks, and what the difference was in the 2 membranes

I think its a little of both. PTFE is teflon. Here is something i found on a titan filters web page if it helps any.

PTFE

Polytetrafluoroethylene (TeflonŽ) membranes are chemically resistant to virtually all solvents, acids and bases. The membrane is very low in extractables and has an excellent thermal stability. PTFE is hydrophobic and requires prewetting prior to use with aqueous solvents.
Use with: Aggressive solvents, strong acids, alcohols, bases, aromatics
Don't use with: Aqueous samples without prewetting (causes high backpressure)

PVDF

Polyvinylidene difluoride is a hydrophilic membrane that is suitable for most filtration purposes. It has a broad chemical compatibility and is a low protein binder.
Use with: Alcohols, weak acids, proteins, peptides and other biomolecules
Don't use with: Strong acids, bases or ketones

[DOUBLE J]

Originally posted by UGAguy20
I think its a little of both. PTFE is teflon. Here is something i found on a titan filters web page if it helps any.

PTFE

Polytetrafluoroethylene (TeflonŽ) membranes are chemically resistant to virtually all solvents, acids and bases. The membrane is very low in extractables and has an excellent thermal stability. PTFE is hydrophobic and requires prewetting prior to use with aqueous solvents.
Use with: Aggressive solvents, strong acids, alcohols, bases, aromatics
Don't use with: Aqueous samples without prewetting (causes high backpressure)

PVDF

Polyvinylidene difluoride is a hydrophilic membrane that is suitable for most filtration purposes. It has a broad chemical compatibility and is a low protein binder.
Use with: Alcohols, weak acids, proteins, peptides and other biomolecules
Don't use with: Strong acids, bases or ketones

Nicely done

[rado]

Originally posted by UGAguy20
I think its a little of both. PTFE is teflon. Here is something i found on a titan filters web page if it helps any.

PTFE

Polytetrafluoroethylene (TeflonŽ) membranes are chemically resistant to virtually all solvents, acids and bases. The membrane is very low in extractables and has an excellent thermal stability. PTFE is hydrophobic and requires prewetting prior to use with aqueous solvents.
Use with: Aggressive solvents, strong acids, alcohols, bases, aromatics
Don't use with: Aqueous samples without prewetting (causes high backpressure)

PVDF

Polyvinylidene difluoride is a hydrophilic membrane that is suitable for most filtration purposes. It has a broad chemical compatibility and is a low protein binder.
Use with: Alcohols, weak acids, proteins, peptides and other biomolecules
Don't use with: Strong acids, bases or ketones

nice post.

[trapattack369]

thanks UGA