Shampoo with SCI same % different order different viscosity
Hello Chemists!Currently I am formulating a sulphate free shampoo. During trials, i found out that changing orders can make a different consistency even on the same percentage.I use:- Water
- Sodium Cocoyl Isethionate (powder) 9%
- Cocamide MEA 3%
- Coco Betaine 7%
When i mix water and SCI first the result of my shampoo becomes very runny almost watery. On my 3rd trial i accidentaly mix Coco Betaine & Cocamide MEA and water first, then add SCI. Its really hard to disperse the SCI but when it finally dispersed the consistency is really thick.Can someone please explain why this happens? And in which order should i put the surfactants?
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