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Beeswax와 실리콘계 계면활성제를 사용한 W/O 유화계에서 액정의 형성 및 안정도에 관한 연구
최문재 ( Moon Jae Choi ),이영무 ( Young Moo Lee ),진병석 ( Byung Suk Jin ) 한국유화학회 2004 한국응용과학기술학회지 Vol.21 No.4
N/A Liquid crystal (LC) system was introduced into W/O emulsion in order to enhance the stability and moisturizing effect. The LC system, composed of beeswax, surfactant, and water was formed on the surface of emulsion droplet, which was investigated through a polarized microscope. The phenomenon that the viscosity in W/O emulsion system is decreased with time, was reduced by the formation of LC with the addition of beeswax. Centrifugal separation test showed that the stability of emulsion system was increased with the addition of beeswax to 3%. The color change of vitamin C was delayed in LC emulsion systems, which indicates stabilization effect against the oxidation of vitamin C. Evaporation rate in W/O emulsion was retarded by LC, so that high moisturizing effect is expected in W/O LC system.
이상민 ( Sang Min Lee ),최문재 ( Moon Jae Choi ),이영무 ( Young Moo Lee ),진병석 ( Byung Suk Jin ) 한국공업화학회 2009 응용화학 Vol.13 No.1
Entrapment of luteolin into ethosomes was performed for improving its stability against oxidation. It was observed that the amount of added luteolin into lecithin had a considerable effect on the particle size of ethosome. The phase behavior of liquid crystalline phase in ethosome was investigated by polarized optical microscopy and DSC. The luteolin stabilization effect through its entrapment in ethosomes was evaluated by DPPH method.