Exploring The Effects Of Wetting And Free Fatty Acid Deposition On An Atomistic Hair Fiber Surface Model Incorporating Keratin-Associated Protein 5-1

April 2023 in “ Langmuir ”

Jeffrey M. Sanders, Benjamin J. Coscia, Alexandr Fonari, Mayank Misra, Paulo G. M. Mileo, David J. Giesen, Andrea Browning, Mathew D. Halls

wetting free fatty acid FFA hair fiber Keratin-Associated Protein 5-1 hair damage virgin hair light damage moderate damage lattice dimensions structural properties water free fatty acids hair health hair appearance

TLDR Damaged hair allows water to penetrate more easily, and fatty acids from shampoos can deposit on hair surfaces.

The study investigates the effects of wetting and free fatty acid (FFA) deposition on a detailed atomistic model of hair fibers that includes Keratin-Associated Protein 5-1. The research examines different conditions of hair damage (virgin, light damage, moderate damage) and their impact on the hair fiber's structural properties. The findings indicate that both wetting and FFA deposition significantly alter the lattice dimensions of the hair fiber model, with more pronounced changes observed in damaged hair. This suggests that the presence of water and FFAs can affect the physical properties of hair, potentially influencing its overall health and appearance.

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