Lamellar structure thins shampoo but thickens cream
Too much salt makes worm-like micelles go lamellar, and shampoo becomes thin.
However, in creams/emulsions the same structure thickens the system.
Why two different results?
"Too much salt makes worm-like micelles go lamellar, and shampoo becomes thin."do you have the source?
edited June 7
seems like it's a description for salt thickening and the salt curve.
After the big peak in viscosity for SLES, what you see is that the giant worm-like micelles are being broken into smaller rods, that's why the decrease in viscosity. Not sure though if they can further be reformed into a lamellar conformation, since the packing of anionics is not precisely convenient for such ordered and tight structure.
Administrator, Professional Chemist
Colloidal solutions are complicated systems which can take on most any of the defined conformations. You would have to do a phase diagram to determine what the prevalent structures are of any given system. Each system is different
Basically, it's complicated.
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