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논문 기본 정보

자료유형
학술저널
저자정보
양진모 (을지대학교) 신광준 (을지대학교 대학원 보건학과) 박승환 (을지대학교 보건과학대학 의료공학과) 하병조 (을지대학교)
저널정보
대한미용학회 대한미용학회지 대한미용학회지 제17권 제3호
발행연도
2021.9
수록면
267 - 273 (7page)

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The purpose of current study is to investigate the swelling behavior and swelling mechanism of white hair under different experimental conditions. Medullary index from swelled hair was also evaluated under various conditions, such as pH of aqueous solution and kinds of surfactants. To understand the swelling behavior, the swelling mechanism under various conditions has also been proposed in this report. The swelling capacity was found to increase significantly with increase in aqueous pH value. As the pH increased, the negative charged surface of hair predominated, resulting in increase in the repulsion of cuticle scales, which in turn increased swelling significantly. With surfactants, the largest swelling was found for anionic surfactant, sodium lauryl surfactant (SLS). The cationic surfactant, cetyl trimethyl ammonium chloride (CTAC) showed better swelling behavior than the nonionics, such as decyl glucoside and saponin. The medullary index showed a lower value with ionic surfactants than that with the nonionic ones. This means the electric double layer of CTAC may affect the total swelling of the hair, but does not destroy the inner crystalline structure of the cortex. The addition of saponin to SLS showed smaller swelling than the SLS alone. We suggest the interactions between sulfate ions of SLS and hydroxyl groups of saponin might be the cause of the reduced swelling. The process of swelling behavior requires further investigation of medullary index for practical application.

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