ＴＥＭを用いた超音波処理毛の内部構造変化の観察

Abstract

We investigated the damaged hair with the transmission electron microscope with respect to the stractural changes of a hair. An ultrasonic generator was used for the purpose of accelerating the damage of a hair experimentally. A healthy hair and a cold wave treated hair were damaged by the above method. Also, a damaged hair in real life was collected from subjects and was investigated by 10cm from the root tothe tip.After a healthy hair was treated by the ultrasonic generator, elution of hair components such as inter macrofibriller material, CMC, and endocuticle was apparent. Elusion from a cold wave treated hair tended to be accelerated when damaged by the ultrasonic generator (experimentally damaged hair). The investigation on the damaged hair in real life showed that the cuticles were peeled off as the external change and elusion of hair components was recognized as the internal change. Especially at the part of hair in the split end, a number of cracks and elution ofhair components were found.In other words, the damages appeared at the cuticle part and cortex part of the experimentally damaged hair are not much different from the ones of the damaged hair in real life. These results suggest that thus ultrasonic treating method is effective in reproducing the hair damage in real life.