ToF-SIMS Characterization of the Lipid Layer on the Hair Surface: Effect of the 18-MEA Lipid Layer on Surface Hydrophobicity
May 2010
in “
Surface and interface analysis
”
TLDR 18-MEA is essential for hair's water resistance, and a conditioner with 18-MEA and SPDA can restore it.
This study examined the impact of 18-MEA damage on hair surface hydrophobicity and the effectiveness of replenishing this lipid layer using ToF-SIMS. It was found that 18-MEA levels significantly decreased in Japanese women who underwent coloring treatments, especially those treated more than twice a year. Even untreated hair showed over 80% loss of 18-MEA at 40 cm from the root. The study demonstrated that 18-MEA is crucial for maintaining surface hydrophobicity. A conditioner treatment combining 18-MEA with Stearoxypropyldimethylamine (SPDA) was effective in restoring and maintaining hydrophobicity and reducing friction on damaged hair surfaces.