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Proceedings Paper

Measurement of Young's modulus and Poisson's ratio of human hair using optical techniques
Author(s): Zhenxing Hu; Gaosheng Li; Huimin Xie; Tao Hua; Pengwan Chen; Fenglei Huang
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Paper Abstract

Human hair is a complex nanocomposite fiber whose physical appearance and mechanical strength are governed by a variety of factors like ethnicity, cleaning, grooming, chemical treatments and environment. Characterization of mechanical properties of hair is essential to develop better cosmetic products and advance biological and cosmetic science. Hence the behavior of hair under tension is of interest to beauty care science. Human hair fibers experience tensile forces as they are groomed and styled. Previous researches about tensile testing of human hair were seemingly focused on the longitudinal direction, such as elastic modulus, yield strength, breaking strength and strain at break after different treatment. In this research, experiment of evaluating the mechanical properties of human hair, such as Young's modulus and Poisson's ratio, was designed and conducted. The principle of the experimental instrument was presented. The system of testing instrument to evaluate the Young's modulus and Poisson's ratio was introduced. The range of Poisson's ratio of the hair from the identical person was evaluated. Experiments were conducted for testing the mechanical properties after acid, aqueous alkali and neutral solution treatment of human hair. Explanation of Young's modulus and Poisson's ratio was conducted base on these results of experiments. These results can be useful to hair treatment and cosmetic product.

Paper Details

Date Published: 14 April 2010
PDF: 9 pages
Proc. SPIE 7522, Fourth International Conference on Experimental Mechanics, 75222Q (14 April 2010); doi: 10.1117/12.851415
Show Author Affiliations
Zhenxing Hu, Tsinghua Univ. (China)
Gaosheng Li, Tsinghua Univ. (China)
Huimin Xie, Tsinghua Univ. (China)
Tao Hua, Tsinghua Univ. (China)
Pengwan Chen, Beijing Institute of Technology (China)
Fenglei Huang, Beijing Institute of Technology (China)

Published in SPIE Proceedings Vol. 7522:
Fourth International Conference on Experimental Mechanics
Chenggen Quan; Kemao Qian; Anand Krishna Asundi; Fook Siong Chau, Editor(s)

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