10 citations,
November 1984 in “Journal of Colloid and Interface Science” The study found that the Marangoni effect causes the uneven wetting of surfactant-coated hair due to the surfactant moving into the water.
18 citations,
April 2010 in “Langmuir” Human hair surface varies in wettability, showing daily and monthly patterns.
36 citations,
October 2014 in “Langmuir” Bleaching hair removes its protective top layer and exposes more hydrophilic groups, changing its chemical surface and affecting how it interacts with products.
25 citations,
May 2019 in “Cosmetics” 18-MEA and cationic surfactants can restore and maintain hair's hydrophobic nature, improving its beauty and feel.
21 citations,
March 2017 in “Skin research and technology” Removing external lipids from hair reduces moisture and increases strength, while removing internal lipids decreases water permeability.