Unveiling the Link Between Surface Physicochemistry and Nanomechanical Behavior in Bleached and UV-Irradiated Human Hair Fibers

    Raphael C.L. Machado, Flávio B. Camargo Júnior, Wagner Vidal Magalhães, Géssica F.D. Oliveira, Alessandra Mari Goshiyama, Maria Cecília B.S. Salvadori
    TLDR Bleaching and UV exposure significantly damage hair.
    This study investigates the degradation of human hair fibers, focusing on the relationship between surface physicochemistry and nanomechanical behavior. Using techniques like Atomic Force Microscopy and Energy-Dispersive X-ray Spectroscopy, the research found that bleached hair fibers show increased adhesion and heterogeneity compared to untreated hair. The study highlights that combined bleaching and UV irradiation significantly amplify hair damage, suggesting a synergistic degradation pathway. These findings emphasize the importance of nanoscale mapping for evaluating cosmetic treatments and have potential applications in forensic and clinical diagnostics by identifying structural and chemical anomalies in hair.
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