title: Evaluation of hair fiber hydration by differential scanning calorimetry, gas chromatography, and sensory analysis.
abstract: Hair hydration is one of the effects that consumers most expect when using a cosmetic hair product. The purpose of this study was to combine differential scanning calorimetry (DSC) and gas chromatography (GC) techniques for a precise evaluation of the water content in hair fiber. DSC allowed determination of the bonding strength of water to hair fibers by quantifying the amount of energy required to remove the water. The amount of water thus removed was determined by GC. Post-treatment sensory evaluations of hair tresses were conducted to determine whether the values obtained with these techniques correspond to the moisturizing sensation perceived by consumers.
authors.affiliation: O Boticário, Av Rui Barbosa 3450, Afonso Pena, São José dos Pinhais, PR, Brazil 83065-260.
authors.forename: Klézia M S
authors.initials: KM
authors.lastname: Belletti
authors.forename: Israel H
authors.initials: IH
authors.lastname: Feferman
authors.forename: Tânia R O
authors.initials: TR
authors.lastname: Mendes
authors.forename: Angela D
authors.initials: AD
authors.lastname: Piaceski
authors.forename: Valéria F
authors.initials: VF
authors.lastname: Monteiro
authors.forename: Neftali L V
authors.initials: NL
authors.lastname: Carreño
authors.forename: Antoninho
authors.initials: A
authors.lastname: Valentini
authors.forename: Edson R
authors.initials: ER
authors.lastname: Leite
authors.forename: Elson
authors.initials: E
authors.lastname: Longo
mesh_terms: D002152:Calorimetry, Differential Scanning / Q000379:methods*; D002849:Chromatography, Gas / Q000379:methods*; D006197:Hair / Q000737:chemistry*; D006801:Humans; D013816:Thermodynamics; D014867:Water / Q000737:chemistry*
chemical_list: D014867:Water