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Books > Science & Mathematics > Physics > Applied physics & special topics > Biophysics
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Biophysics of Human Hair - Structural, Nanomechanical, and Nanotribological Studies (Hardcover, 2010 ed.)
Loot Price: R3,033
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Biophysics of Human Hair - Structural, Nanomechanical, and Nanotribological Studies (Hardcover, 2010 ed.)
Series: Biological and Medical Physics, Biomedical Engineering
Expected to ship within 10 - 15 working days
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Humanhairisananocompositebiological?ber.
Maintainingthehealth,feel,shine,
color,softness,andoverallaestheticsofthehairishighlydesired.
Haircarepr- ucts such as shampoos and conditioners, along with
damaging processes such as chemical dyeing and permanent wave
treatments, affect the maintenance and
groomingprocessandareimportanttostudybecausetheyaltermanyhairprop-
ties.
Nanoscalecharacterizationofthecellularstructure,mechanicalproperties,and
morphological, frictional,andadhesive
properties(tribologicalproperties)ofhair
areessentialtoevaluateanddevelopbettercosmeticproductsandtoadvancethe
understandingofbiologicalandcosmeticscience.
Theatomic/frictionforcemic-
scope(AFM/FFM)andnanoindenterhavebecomeimportanttoolsforstudyingthe
micro/nanoscalepropertiesofhumanhair.
Inthisbook,wepresentacomprehensive review of structural,
nanomechanical, and nanotribological properties of various
hairandskinasafunctionofethnicity,damage,conditioningtreatment,andvarious
environments.
Variouscellularstructuresofhumanhairand?nesublamellarstr-
turesofthecuticleareidenti?edandstudied.
Nanomechanicalpropertiessuchas
hardness,elasticmodulus,tensiledeformation,fatigue,creep,andscratchresistance
arediscussed.
Nanotribologicalpropertiessuchasroughness,friction,andadhesion are
presented, as well as investigations of conditioner distribution,
thickness, and bindinginteractions.
Tounderstandtheelectrostaticchargebuilduponhair,surface
potentialstudiesarealsopresented.
Thebookshouldserveasareferencebookonthebiophysicsofhumanhairand
hairtreatments.
TheresearchreportedinthisbookwassupportedbyProcter&GambleCo. in
Cincinnati,Ohio,andKobe,Japan. IwouldliketothankCarmenLaTorrewhohad
assistedinvariouspublicationsonhairresearch.
Iwouldalsoliketothankmywife
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...
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