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AEO 비이온 계면활성제/Cosurfactant/물/오일 시스템의 상거동에 관한 연구

Phase Behavior Study in Systems Containing AEO Nonionic Surfactant, Cosurfactant, Water, and Oil

고현길 이종기 박소진¹ 박병덕² 홍종규³ 박상권³ 임종주^3†

Hyun-Kil Ko Jong-Ki Lee So-Jin Park¹ Byeong-Deog Park² Jong-Kyu Hong³ Sang-Kwon Park³ Jong-Choo Lim^3†

애경종합기술원, 대전 300-200 ¹충남대학교 화학공학과, 대전 305-764 ²네오팜 화학공학과, 대전 305-333 ³동국대학교 화학공학과, 서울 100-715

Aekyung Industrial Co., LTD., Daejeon 300-200, Korea ¹Department of Chemical Engineering, ChoongNam National University, Daejeon 305-764, Korea ²Department of Chemical Engineering, NeoPharm, Daejeon 305-333, Korea ³Department of Chemical Engineering, Dongguk University, Seoul 100-715, Korea

jongchoo@dgu.ac.kr

HWAHAK KONGHAK, June 2002, 40(3), 316-323(8), NONE

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Abstract

본 연구에서는 AEO계 비이온 계면활성제, 물, D-리모넨의 3성분으로 이루어진 시스템 및 cosurfactant를 첨가할 경우에 대한 상평형 실험을 수행하였다. 비이온 계면활성제, D-리모넨, 물로 이루어진 3성분 시스템에 대한 상평형 실험 결과에 의하면 middle-phase 마이크로에멀젼(microemulsion, μE)이 excess water와 excess oil 상들과 평형을 이루는 3상은 형성되지 않거나 매우 적은 영역에서 형성되었으며, 생성된 단일상의 μE 구조는 전기전도도 측정으로부터 W/O μE으로 판명되었다. 또한 cosurfactant로서 butyl diglycol(BDG), butyl triglycol(BTG)을 첨가한 결과, cosurfactant 첨가량을 증가시킴에 따라 middle-phase μE을 포함한 3상이 생성되는 온도는 감소하였고 3상이 존재하는 온도 범위는 증가하였다. Microemulsion을 사용하여 비극성 오일인 abietic acid, triolein과 윤활유에 대한 가용화 실험을 수행한 결과, W/O μE의 가용화력이 가장 크게 나타났으며, cosurfactant를 첨가할 경우 계면장력이 낮아짐에 따라 가용화도는 증가하였다.

In this study, phase behavior study was performed for ternary systems containing AEO nonionic surfactant, water and D-limonene as a function of surfactant concentration and temperature. The results in the ternary systems showed that a three phase region containing a middle-phase microemulsion(μE) in equilibrium with excess water and excess oil phase was not found or formed over a very limited small region. On the other hand, addition of butyl diglycol(BDG) and butyl triglycol(BTG) as cosurfactants lowered the temperature for the formation of a three phase region including a middle-phase μE and produced a three phase region over a wide range of temperatures. The solubilization experiments for abietic acid, triolein, and lubricant using three different types of μEs showed that the maximum oil removal was achieved with a water-in-oil(W/O) μE in all cases. Addition of a cosurfactant promoted the solubilization mainly due to a decrease in interfacial tension.

Keywords

Phase Behavior Nonionic Surfactant Cosurfactant Microemulsion Solubilization Interfacial Tension

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