Emollient structure and chemical functionality effects on the biomechanical function of human stratum corneum
International Journal of Cosmetic Science2020Vol. 42(6), pp. 605–614
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Christopher A. Berkey, D. Kanno, Annette Mehling, J. P. Koch, W. Eisfeld, Markus Dierker, S. Bhattacharya, Reinhold H. Dauskardt
Abstract
We provide a new rational basis for understanding the effects of cosmetic emollient choice on biomechanical properties affecting SC barrier function and consumer perception. We demonstrate for the first time that emollients very likely reduce SC mechanical stress through their ability to take up volume when penetrating the SC, and how molecular weight, SC diffusivity, TPSA and viscosity are predictive of this ability. As cosmetic formulations continue to evolve to meet the needs of customers, emollient molecules can be selected that not only contribute to formulation texture and/or spreadability but that also leverage this novel connection between emollient penetration and SC biomechanics.
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