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Help? make o/w emulsion

  1. Mar 7, 2015 #1
    Without using microfluidic channels how to prepare a at least 10% (by volume)mineral oil (dispersed)in water emulsion?
     
  2. jcsd
  3. Mar 8, 2015 #2

    Quantum Defect

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    Can you add a surfactant or emulsifier?
     
  4. Mar 8, 2015 #3
    yeah, like SDS(sodium dodexyl sulfate) i prepared a recipe for the emulsion but it is less than 1%.
     
  5. Mar 8, 2015 #4

    Quantum Defect

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    Have you tried sonicating?
     
  6. Mar 8, 2015 #5
    no not yet. i am not sure how sonication work to thicken the emulsion.
     
  7. Mar 12, 2015 #6

    Quantum Defect

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    Vigorously mixing some oils with water and emulsifier can get you a suspension of very tiny oil droplets that are kinetically stable. This is how you make mayonnaise (albeit without the sonicator).

    one egg yolk, dash of lemon juice, dot of mustard ==> slowly add 1 c. olive oil while beating ==> voila! mayonnaise

    The surfactants/emulsifiers are coming from the egg and mustard (lecithin)

    http://en.wikipedia.org/wiki/Lecithin
     
  8. Mar 12, 2015 #7

    Borek

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    While I agree in general (I made mayonnaise many time myself), sometimes it doesn't work. There was an oil sold here (actually some German brand) that I couldn't turn into emulsion no matter how hard I tried. No idea why.
     
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