[balazsomelka]

Hello,


Searching the critical surface tension for calculating the contact angle of hydrophobized particles is done by film flotation ( = hydrophobized particles staying on liquid surface).

This liquid is methanol-water solution in the articles I have read.

My question is that, do these experiments working with the same reliability by using ethanol instead of using methanol?

Thank You for the answer!

Balazs  

[deyouja]

Methanol and ethanol have slightly different surface tensions and therefore the specific mixtures with water will also have different surface tensions.  (~ difference ~ 2 dynes/cm)