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Emulsion Stability of Cosmetic Facial Cream O/W Emulsions Prepared by Brij Type Non-ionic Emulsifie

Brij계 비이온성 혼합유화제를 이용하여 제조된 화장용크림 O/W 유화액의 유화안정성

  • Park, Bo Ra (Department of Chemical Engineering, Dankook University) ;
  • Lee, Seung Min (Department of Chemical Engineering, Dankook University) ;
  • Choi, Junho (Department of Chemical Engineering, Dankook University) ;
  • Lee, Seung Bum (Department of Chemical Engineering, Dankook University)
  • 박보라 (단국대학교 화학공학과) ;
  • 이승민 (단국대학교 화학공학과) ;
  • 최준호 (단국대학교 화학공학과) ;
  • 이승범 (단국대학교 화학공학과)
  • Received : 2018.02.05
  • Accepted : 2018.04.30
  • Published : 2018.08.10

Abstract

In this study, the stability of O/W cosmetic facial cream emulsions according to HLB values was evaluated by mixing nonionic surfactants, such as Brij 78&72 and Brij 98&92. Brij 78&72 (steareth-20&steareth-2, EMS-01), saturated fatty acid, and Brij 98&92 (oleth-20&oleth-2, EMS-02), unsaturated fatty acid, were used as mixed surfactants. The stability of the O/W emulsion was evaluated by using the emulsion viscosity, particle size, particle size distribution, and zeta-potential. The viscosity of the emulsion increased with the increase of time for EMS-01 while that of EMS-02 decreased with the increase of HLB value. The particle size of both EMS-01 and EMS-02 increased with time. The emulsifier with a HLB value of 10.8, which is the most similar to the required HLB value of mineral oil, 10.5, had the smallest particle size and highest density and also showed the highest emulsion stability. The zeta-potential of both emulsions tended to increase with the HLB value. No significant changes were observed in emulsions of the HLB value of 10.8 or more. The saturated fatty acid system, EMS-01, exhibited a higher zeta-potential value than that of the unsaturated fatty acid EMS-02 and also was superior in the stability.

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