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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?
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4 Replies
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“Too much salt makes worm-like micelles go lamellar, and shampoo becomes thin.”do you have the source?
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@Abdullah seems like it’s a description for salt thickening and the salt curve.
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@zetein 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.
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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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