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Emulsion w / o with soy lecithin
Hello,I would like to know if someone could tell me if an emulsion can be formed w / o with liquid soy lecithin (HLB 4). I am trying to make it with fractionated coconut oil (HLB 5) but I have not been able to stabilize the emulsion. Any advice? Maybe you know of any other oil with a low HLB?Thank you. -
5 Replies
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Hi,
could you share your process/method?
And your ingredients? -
Lecithin can be used for o/w and w/o depending on process and composition. A quick workaround would be the combination with a pure w/o emulsifier such as PGPR. And don’t mind HLB and required HLB values, they aren’t accurate/applicable in this context.
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Fractionated coconut oil is routinely used in oil in water emulsions.
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Folks, help a somewhat senior old dog chemist here: what is “fractionated coconut oil’? @Rickfon as lecithin is anionic, I would attempt to include a little anionic soap here, such as a (dare I incur the wrath of @Pharma?) phosphate ester with a higher HLB, or even Potassium Cocoate and not much of it either. On the other hand, a wee bit of PEG-10 Dimethicone will steady that w/o formula also. Honestly, I’ve never even considered using lecithin in an inverse phase emulsion before. You may be breaking new ground here.
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chemicalmatt said:…lecithin is anionic, I would attempt to include a little anionic soap here, such as a (dare I incur the wrath of @Pharma?) phosphate ester with a higher HLB, or even Potassium Cocoate and not much of it either. On the other hand, a wee bit of PEG-10 Dimethicone will steady that w/o formula also…
Except phosphatidylinositol and some minor constituents, ‘lecithin molecules’ are at physiological pH zwitterionic. However, the overall charge is negative and hence, behaviour of lecithin ‘droplets’ is anionic. Combining with what @chemicalmatt suggested is, very often, a very good advise.
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