Lunn Rebecca J, Leray Yann, Bucknell Steve, Stringer Daniel M
Dia-Stron Limited, Andover, Hampshire, UK (R.J.L., Y.L., S.B., D.M.S.).
J Cosmet Sci. 2018 Sep/Oct;69(5):383-396.
To date, most single hair fiber mechanical testing publications in the literature have focused on tensile deformation with torsional measurements receiving far less attention. However, there is much to be gained from the measurement of torsional properties of a single hair fiber such as providing an insight into the shear stiffness changes that are associated with cuticle damage. This study outlines the potential use of torsional measurements to differentiate between cosmetic treatments where other modes of deformation do not. A core/shell modeling approach has also been applied to separate out the potential contributions of the cuticles and the cortex on the fiber torsional modulus and the effect of relative humidity on hair fiber structural components.
迄今为止，文献中大多数关于单根毛发纤维力学测试的出版物都集中在拉伸变形上，而扭转测量受到的关注要少得多。然而，测量单根毛发纤维的扭转特性有很多益处，比如可以深入了解与表皮损伤相关的剪切刚度变化。本研究概述了扭转测量在区分其他变形模式无法区分的美容处理方面的潜在用途。还应用了一种核/壳建模方法，以分离出表皮和皮质对纤维扭转模量的潜在贡献以及相对湿度对毛发纤维结构成分的影响。
