The transverse vibrational properties of keratin fibres in the presence of water and other materials.
Summary Vibrating methods allow studies about the elastic properties of keratin fibres in the weak deformation range preventing interferences due to the usual problems encountered in the strain-strength studies. Two new transversal vibrating methods are presented. They afford the measurement of the dynamical elastic modulus, the specific weight and the ellipticity of the fibres. These two methods are used in order to characterise natural or chemically modified fibres. The influence of ionic bonds on water content of the fibres and therefore on their visco-elastic properties has been investigated. Effect of agents used for cosmetic treatments (hair bleaching, permanent waving, polymer coating) are interpreted in terms of the keratin structure and of its interaction with water molecules.
Garson
J C
JC
Laboratoires de Recherche de l'Oreal, Groupe de Physique, 1 av. de Saint-Germain, 93600 Aulnay-sous-Bois, France.
Vidalis
M
M
Roussopoulos
P
P
Leveque
J L
JL