-
Free vs Bound Water
I am making Syndet bars using ground SCI as a main ingredient. My formula also contains 2% Sodium Lactate 60% solution. That means 1.2 % actual Sodium Lactate and 0.8% of Water.
1st Question - Am I right to assume that this 0.8% water is bound by the Sodium Lactate even if it is added to an anhydrous mixture of dry powder surfactants? Does it essentially stay bound?
Aside from this 0.8% water, my formula also contains 5.60 % free water from CAPB.
2nd Question - When water is used as a binder, is it considered bound or is that simply a term for free ions dissolved in water?
I have on hand Sodium Chloride, Sodium Citrate and Silicon Dioxide (Colloidal and regular)
3rd Question - How do I measure binding power of the different salts?
I know that 1g of water dissolves 0.35g of NaCl from a simple google search.
4th Question - Does this mean that 0.35 g of NaCl binds 1.00 g of water or is there more to it?
5th Question - Are there any potential complications to adding any of these salts directly to CAPB? Would using high amounts of Sodium Citrate lower the pH too much?
I know these are a lot of questions but I would really appreciate some answers. I have been reading many books and running many tests, but sometimes answers to simple questions are difficult to find on my own.
Log in to reply.