Hi I have a very difficult question about bubble properties. There are many recepies but I'd like to know parameter of surface tension for different recepies. I can measure it one by one but may be anybody knows what surface recepie has bigger/smaller surface tension? Does anybody know what shoyld be added to a juise to increase/decrease surface tension?
- There is very little difference in the surface tension of the recipes that you will find on the site. Even at 50:1, with a detergent that is similar to Dawn Pro or full-strenth Fairy, the concentration is well above the CMC. A few years ago, we speculated that the differences in film thickness one sees at different dilutions might be related to surface tension, but recently someone with access to the needed lab equipment was able to determine that there isn't a notable difference in surface tension between solutions with a lot of soap and the most dilute solutions that are workable. More here. Our polymers are pretty neutral in terms of impact on surface tension given that we are already maxxing out the surface tension reduction that can be accomplished with surfactants.
Espiegel123 (talk) 01:19, February 5, 2016 (UTC)
Thanks, it's interesting. I need to try it. I tried to measure just regular bubble liquid from walmart
I've got 30 mN/m plus-minus1%. They have 25mN/m that is quite different.
- When you say, I've got ... and they've got....
- Are you saying that you got measurements of 30 mN/m when you measured the Walmart liquid. And by 'They've got' are you refererring to the measurements in the post that I linked to?
- If so, can you try measuring 10:1 distilled water and Dawn Ultra and also plain distilled water. This should give an idea if the discrepancy is related to calibration differences.
- What equipment did you use for the measurement?
- Espiegel123 (talk) 23:38, February 5, 2016 (UTC)