Journal of the Society of Cosmetic Scientists of Korea (대한화장품학회지)

Society of Cosmetic Scientists of Korea (대한화장품학회)
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Stability of Nano-emulsions Containing Fatty Acid and Fatty Alcohol

지방산 및 지방알코올을 함유한 나노에멀젼의 안정성

  • 조완구 (전주대학교 의과학대학 바이오기능성식품학과) ;
  • 김경아 (전주대학교 의과학대학 바이오기능성식품학과) ;
  • 장선일 ((주)아토큐앤에이 기업부설연구소) ;
  • 조병옥 ((주)아토큐앤에이 기업부설연구소)
  • Received : 2017.08.26
  • Accepted : 2017.12.11
  • Published : 2017.12.30
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Abstract

In this study, low viscous O/W (oil-in-water) nano-emulsion with fatty acid and fatty alcohol was prepared by phase inversion emulsification method using Tween 80 and Span 80 widely used in cosmetic products. The particle size of the nano-emulsion was increased as increasing the concentration of fatty alcohol in oil phase. Adjusting the HLB of mixed surfactants, a stable nano-emulsion with a narrow size distribution was produced. Similar change in viscosity and electrical conductivity in both systems containing fatty acid and fatty alcohol was shown in the vicinity of the phase inversion point. However, high viscosity was shown in a wide range of different aqueous fraction unlike the system consisting only oils and surfactants. The low viscous nano-emulsion with less than 100 nm droplet size was stable for one month or more at room temperature. O/W nano-emulsions with low viscosity containing fatty acid or fatty alcohol produced by low-energy emulsification method can be widely used as formulations of cosmetics.

본 실험에서는 화장품에 널리 사용되는 지방산과 지방알코올을 Tween 80과 Span 80을 함께 사용하여 조성 상전이 유화법으로 O/W (oil-in-water) 저점도 나노에멀젼을 제조하였다. 지방알코올의 오일상에서의 농도가 증가할수록 나노에멀젼의 입자 크기가 증가하였다. 혼합계면활성제의 HLB를 조절하여 입도 분포가 좁고 안정한 나노에멀젼의 제조가 가능하였다. 전상점 부근에서 지방산 및 지방알코올을 함유한 계 모두에서 유사한 점도와 전기전도도의 변화를 보였으나 오일과 계면활성제만으로 구성된 계와는 다르게 넓은 수용액상 분율범위에서 높은 점도를 나타냈다. 입자 크기가 100 nm 미만의 저점도 나노에멀젼은 실온에서 한 달 이상 안정하였다. 지방산 또는 지방알코올을 함유하고, 저에너지 유화법으로 제조된 저점도 O/W 나노에멀젼 제형은 화장품의 기재로서 널리 사용될 수 있다.

Keywords

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