Biophysics of Human Hair: Structural, Nanomechanical, and Nanotribological Studies by Bharat BhushanBiophysics of Human Hair: Structural, Nanomechanical, and Nanotribological Studies by Bharat Bhushan

Biophysics of Human Hair: Structural, Nanomechanical, and Nanotribological Studies

byBharat Bhushan

Paperback | January 2, 2013

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Sudha,whohasbeenforbearingduringthepreparationofthisbook. Powell,OH BharatBhushan November2010 v Contents 1 Introduction-Human Hair, Skin, and Hair Care Products. . . . . . . . . . . 1 1. 1 HumanHair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 1. 1. 1 TheCuticle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 1. 1. 2 TheCortexandMedulla. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 1. 2 Skin. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 1. 3 HairCare:CleaningandConditioningTreatments,andDamaging Processes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 1. 3. 1 CleaningandConditioningTreatments:Shampoo andConditioner. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 1. 3. 2 DamagingProcesses. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 1. 4 OrganizationoftheBook . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 2 Experimental Methods. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 2. 1 ExperimentalApparatuses. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 2. 2 ExperimentalProcedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 2. 2. 1 StructuralCharacterizationUsinganAFM. . . . . . . . . . . . . . . . 26 2. 2. 2 SurfacePotentialStudiesUsingAFM-Based KelvinProbeMicroscopy. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 2. 2. 3 NanomechanicalCharacterizationUsingNanoindentation . . . 30 2. 2. 4 InSituTensileDeformationCharacterizationUsingAFM . . . 32 2. 2. 5 Macroscale Tribological Characterization UsingaFrictionTestApparatus. . . . . . . . . . . . . . . . . . . . . . . . . 33 2. 2. 6 Micro/nanotribologicalCharacterizationUsinganAFM. . . . . 35 2. 3 HairandSkinSamples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41 3 Structural Characterization Using an AFM . . . . . . . . . . . . . . . . . . . . . . . . 45 3. 1 StructureofHairCrossSectionandLongitudinalSection . . . . . . . . . . 45 3. 1. 1 CrossSectionofHair. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45 3. 1. 2 LongitudinalSectionofHair. . . . . . . . . . . . . . . . . . . . . . . . . . . . 45 3. 2 StructureofVariousCuticleLayers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48 3. 2. 1 VirginHair. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48 vii viii Contents 3. 2. 2 ChemicallyDamagedHair. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 3. 2. 3 Conditioner-TreatedHair. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52 3. 2. 4 EffectofHumidityonMorphologyandCellularStructure ofHairSurface. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54 3. 3 Summary. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55 4 Nanomechanical Characterization Using Nanoindentation, Nanoscratch, and AFM. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57 4. 1 Hardness,Young'sModulus,andCreep. . . . . . . . . . . . . . . . . . . . . . . . .
Title:Biophysics of Human Hair: Structural, Nanomechanical, and Nanotribological StudiesFormat:PaperbackDimensions:192 pagesPublished:January 2, 2013Publisher:Springer-Verlag/Sci-Tech/TradeLanguage:English

The following ISBNs are associated with this title:

ISBN - 10:3642266134

ISBN - 13:9783642266133

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Table of Contents

Introduction.- Human hair, skin, and hair care products.- Experimental.- Structural characterization using an AFM.- Nanomechanical characterization using nanoindentation, nanoscratch, and AFM.-Multi-scale tribological characterization.- Conditioner thickness distribution and binding interactions on hair surface.-Surface potential studies of human hair using Kelvin Probe Microscopy.- Closure.