Viscosity Changes

Posted by filiz on March 9, 2021 at 8:08 am

How does the amount of surfactant affect viscosity?

I’m working on hand soap and shower gel.
the shower gel has 22% surfactans
the hand soup has 16% surfactans

the result of end of the experiments;
Shower gel viscosity higher than hand soup…

used surfactans in Hand soup experiment:

SODIUM
LAURETH SULFATE 70% -10

COCAMIDOPROPYL
BETAINE 35% -3
Coco Glucoside -0,5

used surfactans in Shower gel experiment:
SODIUM LAURETH SULFATE 70% -15

COCAMIDOPROPYL BETAINE 35% -5
Coco Glucoside -0,5

Thank you…

chemicalmatt replied 3 years, 9 months ago 2 Members · 1 Reply

1 Reply

chemicalmatt

Member
March 10, 2021 at 6:55 pm

The reason you are seeing a higher viscosity with higher surfactant content is the amount of available water is decreasing. Keep going in this direction and you will soon have a jelly. However, should you change ratios of these three surfactants you would see higher or lower viscosities due to physical chemistry I am not going to spend time here explaining.