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Why membrane pretreatment must use Ethanol?

Why membrane pretreatment must use Ethanol?

Why membrane pretreatment must use Ethanol?

(OP)
Dear all members,
Hydrophobis membrane usually must be prewetted. And in every book or journal I have read, they always use ethanol.
I am confuse. Why must ethanol?
Why not methanol instead?

Thank you,
Yul

RE: Why membrane pretreatment must use Ethanol?

Since the membrane is hydrophobic, most permeable species probably interact with the membrane through london dispersion forces.  Thus, ethanol has a higher molecular weight than methanol and will have more affinity for the hydrophobic membrane.

Floosh.

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