Home Cosmetic Science Talk Formulating Does pH of shampoo effect the deposition of Amodimethicone from Shampoo

  • Does pH of shampoo effect the deposition of Amodimethicone from Shampoo

    Posted by Abdullah on October 22, 2021 at 9:32 am

    If we use Amodimethicone in shampoo without cationic polymers, does pH of shampoo effect how much Amodimethicone deposit on hair? 

    I mean difference between pH 5 and pH 4.

    Recently i made two sample of shampoo with 0.3% Amodimethicone conditioner without cationic polymers. One at pH 4 and another at pH 5. The combing and hair feel after the shampoo at pH 4 is better compared to the one at pH 5. 

    Shampoo is SLES/SLS/CAPB/APG with Amodimethicone emulsion (0.3% silicone)

    Abdullah replied 2 years, 7 months ago 2 Members · 4 Replies
  • 4 Replies
  • ariepfadli

    Member
    October 23, 2021 at 5:54 pm

    Low pH will organize you hair cuticle in closed form, also more cationic surfactant deposition

  • Abdullah

    Member
    October 24, 2021 at 1:55 am

    @ariepfadli what about Amodimethicone deposition as it is not surfactant? 

  • ariepfadli

    Member
    October 24, 2021 at 7:22 am

    Amino head act as anchor to anion protein side of keratin fiber on cuticle, same with cation side on cationic surfactant

    This moety wil protonated depend on pH , more acidic , more protonated cationic side, and will higher deposition on anionic site on keratin/cuticle
  • Abdullah

    Member
    October 24, 2021 at 2:38 pm

    Thanks Ariepfli

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