Mechanism of Frizz Phenomenon Occurring in Bleached Hair

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  • ブリーチ毛髪のうねり発生機構

Abstract

<p>The bleached hair tends to get tangled at the time of shampooing which leads it to frizz and spread from the root after drying. In order to elucidate the mechanism of frizz formation in bleached hair, we first attempted to reproduce the frizz phenomenon and examined the causal relationship between the basic physical properties of bleached hair and the frizz phenomenon, as well as the detailed internal structure of the frizz area. Bleached hair possesses the following characteristics when compared with untreated hair and colored hair. 1) Water easily spreads over the surface of the hair, making it more highly hydrophilic. 2) Water swelling is higher. 3) The elastic modulus and strength in water are low, and the recovery from deformation is also low (high residual strain is present). 4)There is little difference in elastic modulus and strength in the dry state, but recovery from deformation is low( high residual strain is present). The characteristics of bleached hair 1), 2), and 3) are factors that increase tangling by causing hairs to adhere to each other during shampooing. The characteristic 4) of bleached hair is the main factor that immobilizes the deformation generated as the entangled intersections are pulled during drying. Small-angle x-ray scattering experiments also revealed that the immobilized denatured structure is mainly due to the stretching and thinning of the intermediate filament associated proteins (IFAP) in cortex cells by pulling the intersections of the tangled bleached hair.</p>

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