• Formulating

  Why I can’t replicate the same results with the formula used in this dishwash scientific study?

  Posted by Gunther on November 21, 2019 at 10:37 pm

  The authors proposed:
  LABSA 10% (neutralized with enough NaOH to get pH 9-10)
  SLES 2%
  CAPB 2%
  all of them on an active basis (I even contacted one of the researchers to make sure they were listed on an active basis)

  https://ejchem.journals.ekb.eg/article_7631_aed50d75c833b783095ca669b368d51a.pdf
  https://pdfs.semanticscholar.org/9051/666ca47185a7fb70a0ba3f3ff06f20c19e50.pdf

  For 10% LABSA (neutralized with NaOH) + 2% SLES
  -  1.5% active CAPB makes it very thick and cloudy, even at room temperature.
  -  0.5% and 1.0% active CAPB are clear at room temperature but cloud at fridge temps (even with no salt added)
  -  0% CAPB stays clear (no salt added too)
  I tried switching CAPB suppliers to no avail (in case too much salt in CAPB was skewing my results).

  I have no idea what’s going on.
  I’ll try 10% LABSA (neutralized) + 4% SLES to see if it works any better. I feel like I’m shooting in the dark.

  Gunther replied 5 years, 1 month ago 1 Member · 0 Replies

  • dishwash
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