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力学与实践 ›› 2019, Vol. 41 ›› Issue (1): 60-64.doi: 10.6052/1000-0879-18-425

• 应用研究 • 上一篇    下一篇

洗发水对头发力学性能的影响1)

杨芃芊2),*, 王素芳, 郇勇†,3   

  1. *北京市第四中学,北京 100034;
    中国科学院力学研究所非线性力学国家重点实验室,北京 100190;
  • 收稿日期:2018-10-26 出版日期:2019-02-20
  • 通讯作者: 2)杨芃芊,高中生。E-mail: qqyp115@126.com; 3)郇勇,研究员,博士,主要从事生物力学方面研究。E-mail: huany@lnm.imech.ac.cn
  • 基金资助:
    1)中国科学院关键技术人才项目资助项目

INFLUENCE OF SHAMPOO ON THE MECHANICAL PROPERTIES OF HUMAN HAIRS1)

YANG Pengqian2),*, WANG Sufangy, Huan Yongy†,3   

  1. *Beijing No.4 High School, Beijing 100034, China;
    State Key Laboratory of Nonlinear Mechanics,Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190,China;
  • Received:2018-10-26 Online:2019-02-20

摘要: 头发的弹性和抵抗意外拉断的能力是人们非常关注的指标。为了迎合这一需求,有些厂商推出了具有所谓“强韧”发质功效的洗发水,但其实并不清楚是否真能使头发变“强韧”。为此,针对市场上常见的一种标称具有“强韧”功效的洗发水,通过拉伸力学实验对头发洗护前后的力学性能进行了对比研究。结果表明,用洗发水处理后的头发,屈服应力下降,意味着头发更容易过早进入塑性变形;抗拉强度、最大应变减小,意味着头发抵抗外力拉断的能力下降;杨氏模量下降,说明头发抵抗弹性变形的能力变差。综上,所研究的洗发水对“强韧”发质没有帮助。 关键词: 头发,洗发水,力学性能,强度,韧性

关键词: 头发, 洗发水, 力学性能, 强度, 韧性

Abstract: People usually pay close attention to the fragility of their hairs. Therefore some kinds of shampoo with the function of so-called “strengthening hair” come into being on the market. However the real effect is not clear. In this paper, the mechanical properties of human hairs, treated with a typical shampoo with the function of “strengthening hair”, are determined using tensile experiments. The results indicate that after being treated with shampoo, the yield stress of the hair decreases, which means that the ability to resist plastic deformation is weakened. Also, the ultimate stress and the ultimate strain are decreased, which means a reduced ability of the hair to resist the accidental breakage. In addition, Young's modulus goes down, showing a poor ability of the hair to resist the elastic deformation. To sum up, the shampoo studied in this paper is not helpful to “strengthen” or “toughen” hairs.

Key words: hair, shampoo, mechanical properties, strength, ductility

中图分类号: 

  • V215.34