Cosmetic Science Talk

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  • Surface tension questions

    Posted by chickenskin on January 18, 2017 at 1:48 pm

    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

    jeremien replied 6 years ago 3 Members · 3 Replies
  • 3 Replies
  • DRBOB@VERDIENT.BIZ

    Member
    January 18, 2017 at 2:40 pm

    Low ST at oil//water interface but also take HLB into account for stability 

  • jeremien

    Member
    January 18, 2017 at 5:07 pm

    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. 

  • johnb

    Member
    January 19, 2017 at 7:58 am

    Surface tension is only one of a number of parameters to be considered in emulsion stability.

  • jeremien

    Member
    January 19, 2017 at 9:29 am

    It’s not related to emulsion stability, but emulsion formation. Stability is related with zeta potential, steric stabilization, viscosity of your phases, etc.