Home Cosmetic Science Talk Formulating General surfactants and emulsifiers

  • surfactants and emulsifiers

    Posted by Anonymous on October 15, 2018 at 6:11 pm

    I am working on a project that is a combination of oil and water, it contains about 14% oil.  In addition to that 20% is sodium chloride.  I am trying to get the mixture to first become a stable mixture while decreasing surface tension, (and here is where the problem comes in) and keep the viscosity very low (sprayable).  I am trying to stay as natural as possible also.  
    The biggest problem that I am having is with that much salt surfactant that I have tried just thickens up to the point of shampoo consistency.  
    Any ideas and thoughts would be greatly appreciated.  
    I have not done much chemistry since college but find myself with another business venture that requires some.

    MarkBroussard replied 5 years, 7 months ago 3 Members · 3 Replies
  • 3 Replies
  • belassi

    October 15, 2018 at 7:00 pm

    Use a surfactant that is not liable to thicken with salt.

  • chemicalmatt

    October 17, 2018 at 4:46 pm

    20% NaCl in a o/w emulsion? Stable? Low viscosity? Sprayable? - good luck with that.

  • MarkBroussard

    October 17, 2018 at 5:41 pm


    It sounds like you are trying to creating a sprayable emulsion that also includes a surfactant.

    (1)   14% is a lot of oil to get into solution, you might consider dropping that down significantly.

    (2)   20% NaCl … perhaps more like 2% … perhaps 20% is a typo

    (3)   Use Sucrose Stearate as the emulsifier.  It will create a milky white emulsion that is water-thin.

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