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 prepared upon Change of Composition

조성변화에 따라 제조된 나노에멀젼의 안정성

  • 조완구 (전주대학교 대체의학대학 기초의과학과) ;
  • 김은희 (전주대학교 대체의학대학 기초의과학과) ;
  • 전봉주 (코스메카코리아 중앙연구소) ;
  • 차영권 (코스메카코리아 중앙연구소) ;
  • 박선기 (코스메카코리아 중앙연구소)
  • Received : 2012.09.18
  • Accepted : 2013.03.13
  • Published : 2013.03.31
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Abstract

Applications of nano-emulsion for cosmetics as a means of promoting dermal absorption have been the subject of interest. In this study, the stability of nano-emulsions prepared by low-energy emulsification method and varying the composition of raw materials was investigated. By measuring the particle size of the nano-emulsion against time, the stability of nano-emulsions prepared by adding polyol to water phase was increased significantly compared with the nano-emulsions prepared by adding polyol to ethanol phase. The speed of adding ethanol phase to water phase did not have a significant impact on the particle size and stability. Depending on the type of oil, stability was not affected. However, there would be a correlation between the initial size of the nano-emulsion droplets and the molecular weight and polarity of the oil. Stability and the initial particle size according to the type of polyols showed a similar trend except 1,2 hexanediol. The initial droplet size was affected by the concentration of surfactant and oil. However, the initial droplet size did not change against time. Concentration of ethanol was observed to have a significant impact on the initial particle size and stability.

경피흡수 증진의 수단으로 나노에멀젼의 화장품 응용이 관심의 대상이 되고 있다. 본 연구에서는 저에너지 유화법으로 제조된 나노에멀젼 구성 원료들의 조성을 달리하여 안정성을 확인해 보고자 하였다. 시간 경과에 따른 나노에멀젼의 입자 크기 측정을 통한 안정성 실험 결과, 폴리올을 수상에 첨가한 경우 에탄올상 첨가에 비해 안정성이 크게 증가하였다. 에탄올상의 수상에 대한 첨가속도는 입자 크기나 안정성에 큰 영향이 없었다. 오일의 종류에 따라서도 안정성에는 영향이 없었으나 초기에 형성되는 입자 크기는 오일의 분자량과 polarity에 상관관계를 보이는 것으로 생각되었다. 폴리올의 종류에 따른 안정성과 초기 입자 크기는 1,2 헥산디올을 제외하고는 유사한 경향을 보였다. 오일과 계면활성제 농도 변화는 제조된 나노에멀젼의 초기 입자 크기에는 영향을 주었으나 시간 경과에 따른 변화는 없었다. 에탄올의 농도 변화는 초기 입자 크기와 안정성에 큰 영향을 미치는 것으로 관찰되었다.

Keywords

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