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Structural, Nanomechanical, and Nanotribological Characterization of Human Hair Using Atomic Force Microscopy and Nanoindentation

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Book cover Nanotribology and Nanomechanics

Abstract

Human hair is a nanocomposite biological fiber. Maintaining the health, feel, shine, color, softness, and overall aesthetics of the hair is highly desired. Hair care products such as shampoos and conditioners, along with damaging processes such as chemical dyeing and permanent wave treatments, affect the maintenance and grooming process and are important to study because they alter many hair properties. Nanoscale characterization of the cellular structure, mechanical properties, and morphological, frictional, and adhesive properties (tribological properties) of hair are essential to evaluate and develop better cosmetic products, and to advance the understanding of biological and cosmetic science. The atomic/friction force microscope (AFM/FFM) and nanoindenter have become important tools for studying the micro/nanoscale properties of human hair. In this chapter, we present a comprehensive review of structural, mechanical, and tribological properties of various hair and skin as a function of ethnicity, damage, conditioning treatment, and various environments. Various cellular structure of human hair and fine sublamellar structures of the cuticle are identified and studied. Nanomechanical properties such as hardness, elastic modulus, tensile deformation, creep, and scratch resistance are discussed. Nanotribological properties such as roughness, friction, and adhesion are presented, as well as investigations of conditioner distribution, thickness, and binding interactions. To study the electrostatic charge build up on hair, surface potential studies are also presented.

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Authors and Affiliations

  1. Nanoprobe Laboratory for Bio- & Nanotechnology and Biomimetics (NLB2), Ohio State University, 201W. 19th Avenue, 43210-1142, Columbus, Ohio, USA

    Bharat Bhushan

  2. Insulating Systems Business, Owens Corning, 2790 Columbus Road Route 16 (Bldg 20-1), 43023, Granville, OH, USA

    Carmen LaTorre

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  1. Bharat Bhushan
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Bhushan, B., LaTorre, C. (2008). Structural, Nanomechanical, and Nanotribological Characterization of Human Hair Using Atomic Force Microscopy and Nanoindentation. In: Nanotribology and Nanomechanics. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-77608-6_24

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