-
Can viscosity decrease anyhow in salt thickened cleanser when some water evaporates
When a Shampoo is thickened by NACL, if some water evaporates from it, viscosity increases. is there any chance that viscosity decrease anyhow?
My opinion is that viscosity should never decrease in anyway but i saw somewhere that viscosity can reduce is some cases. How?
-
2 Replies
-
I suppose theoretically if enough water was lost you could push the system to the other side of the salt curve and start losing viscosity.
See in this diagram in this surfactant system that viscosity peaks at a salt concentration around 1% and drops off around 1.6%
https://www.researchgate.net/figure/shows-the-salt-curves-for-the-SLES-alone-and-in-the-presence-of-the-four-additives-The_fig13_255766342 -
Perry said:I suppose theoretically if enough water was lost you could push the system to the other side of the salt curve and start losing viscosity.
See in this diagram in this surfactant system that viscosity peaks at a salt concentration around 1% and drops off around 1.6%
https://www.researchgate.net/figure/shows-the-salt-curves-for-the-SLES-alone-and-in-the-presence-of-the-four-additives-The_fig13_255766342Thanks
I thought the ratio of NACL & surfactants will be the same so viscosity will not change but i got the point.
Log in to reply.