Surface tension questions

As a formulator are we wanting high surface tension or low surface tension at the interface of an emulsion?  I would think low due to molecular packing?  Let me know what y'all think about this, I'm a little confused on this.  Thank you


  • Low ST at oil//water interface but also take HLB into account for stability 
  • low surface tension for emulsion application (below 30 mN.m-1) and ultralow for microemulsion application (<1 mN.m-1). The lower the surface/interfacial tension less energy you have to apply to your system to emulsify. 

  • johnbjohnb Member, Professional Chemist
    Surface tension is only one of a number of parameters to be considered in emulsion stability.
  • It's not related to emulsion stability, but emulsion formation. Stability is related with zeta potential, steric stabilization, viscosity of your phases, etc. 
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