Abstract
The o/w emulsions were prepared with saccharide surfactants which were sucrose monostearate(S160), sucrose distearate(S110), and POE(20) methyl glucose stearate(SSE20). And for emulsion the oils used were n-hydocarbon, squalane(SQ), liquid paraffin(LP), octylpalmitate(OP), octylstearate(OS), alkyl benzoate(AB), isostearyl benzoate(ISB). The structures of o/w emulsion droplet were investigated by laser light scattering and the fractal dimensions were calculated from light intensity curves. Increasing of concentration, chain length, and nonpolarity of oils, fractal dimensions of emulsion droplets were found greater. In general fiactal dimensions were varied from 1.7 to 2.8 and its structures were fractal But the fractal dimensions of octadecane( $C_{18}$), 50, and LP emulsified with S110 and S160 were varied from 3.0 to 3.2 and its structures were more dense. The overall fractal dimensions of S110 and S160 were varied from 2.1 to 2.6, that of SSE20 were varied from 1.5 to 2.1. So it was found that the structures of SSE20 system were less compact than that of S110 and S 160 system, because the hindrance effect of polyoxyehtylene group of SSE20 was stronger than that of sucrose of S160. The strucures of emulsion droplets changed according to the nature of emulsifiers and to compositions of oil substances which they contained, and the structures were found similar when the hydophilic moiety of emulsifiers was same.
당류계 계면활성제인 sucrose distearate(S110), sucrose monostearate(S160), POE(20) ethyl glucose stearate(SSE20)과 오일성분인 알칸 계열의 탄화수소 hexane( $C_{6}$), decane( $C_{10}$), tetradecane( $C_{l4}$), octadecane( $C_{8}$)과 squalane (SQ) , liquid paraffin(LP) , octylpalminate(OP) , octylstearate(OS), alkylbenzoate(AB), isostearylbenzoate(ISB)를 사용하여 에멀젼을 제조하였으며 에멀젼 입자의 구조 형태는 광산란법을 이용하여 fractal 차원으로 나타내었다. 에멀젼 입자의 fractal 차원은 오일의 농도 및 탄소수와 오일의 비극성이 증가함에 따라 크게 나타났다. fractal 차원은 대부분 1.7~2.8으로 입자의 구조 형태는 fractal 구조를 이루고 있으나, S110계와 S160계의 Cla 50, LP의 fractal 차원은 3.0~3.2으로 내부 구조가 비교적 조밀한 회합체 구조를 형성하였다. S160계와 S110계의 fractal 차원은 2.I~2.6으로 서로 비슷한 fractal 구조를 형성하며, SSE20의 fractal 차원는 1.5~2.1으로 S160계 및 S110계 보다 덜 조밀한 회합체 구조를 이루는 것으로 나타났다. 입자의 구조 형태는 오일과 계면활성제의 종류에 영향을 받으며 계면활성제의 친수부가 동일하면 비슷한 구조를 형성하였으며 S160의 친수부 구조인 sucrose보다 SSE20의 polyoxyethylene group에 의한 장애효과가 더욱 크게 나타났다.다..