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New Contributor

Need help with emulsification in a formulation

Hello all, I'm looking for direction from professionals to help me find a solution to a emulsification problem I'm having with a simple formula I've created.  Soybean oil needs to mix with water and 5 other ingredients into a stable emulsified formula that doesn't separate after time.

I would like to find a chemist that can assist with this specific problem.  Should I look for a consultant first and then figure out what kind of specialist I need?

I'm willing to give more information through private message but this formula is a commercial product already on the market.

Thank you for your help!

3 Replies
New Contributor

Re: Need help with emulsification in a formulation

Really, I can easily solve your problem of the stability of an emulsion containing soybean oil. It is possible that the recipe will not be limited to the above 5 ingredients. You may need the 6th one 🙂 My contact: mypletnev46@gmail.com. Regards, Michael.

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New Contributor

Re: Need help with emulsification in a formulation

Hello,

Look into using HLB to select the correct emulsifiers. You will likely need a mixture of emulsifiers in order to get it stable-- one on the lower end, one on the higher end of the HLB scale.

Soybean Oil has a required HLB of 7. You need a mix of emulsifiers that come to an HLB of around 7. The rest depends on how much oil you are trying to emulsify, the other ingredients, etc. But HLB is the primary step.

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New Contributor III

Re: Need help with emulsification in a formulation

Dear Travis,

As Gabrielle has said there are tools like HLB or the more modern HLD ( an excellent site for explaination of  HLD see HLD | Practical Surfactants Science | Prof Steven Abbott ) that can be used to find an emulsification system.  She and Michael are on the right track that it will probably take more than one surfactant to do the job.  Surfactants are highly synergistic and mixtures often work much more efficiently than single ingredients.  I know this is inconvenient when you are trying to minimize cost and supply chain but that's what usually happens.

I would also comment that stability in emulsions is a matter of degree.  Every emulsion (excepting microemulsions that are a special case) is thermodynamically unstable and will separate.  What we usually agree is commercially "stable" is something that will hold without separation for a period of 6 months - 2 years depending on the industry.  They are also notoriously sensitive to temperature - what is stable at room temperature is not necessarily "stable" if it is shipped for a week in a truck where the temperature goes over 100 F or under freezing.  This means that you have to test for stability under a number of conditions.

I apologize if this information is already obvious to you.

I was a commercial formulator for a consumer package goods manufacturer for many years.  By now you probably have help but I also do commercial consulting if you need more help.  karenwiz2016@gmail.com

Good luck with your project.

Karen

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