In this study, two kinds of microemulsion-type semi-aqueous cleaning agents that consisted of organic solvent, surfactant, cosurfactant, and water were formulated by changing formulation parameters such as organic solvent type and contents, surfactant type and contents, and cosurfactant/surfactant(A/S) ratio. Physical properties and flux removal of the formulated cleaning agents have also been evaluated. The performance of oil-water separation from the rinse water contaminated during the cleaning process was evaluated for its recycling. The formulated cleaning agents in this work were found to form water-in-oil (W/O) type microemulsion and they were expected to have good penetration because of their low viscosity and low surface tension of 30.2~32.5 dyne/cm. The flux removal with the terpene type cleaning agent was higher than those of hydrocarbon type cleaning agent and two commercial products (CPA, CPB), and the solubility increased with hydrophobicity of the nonionic surfactant. The performance of oil-water separation from the rinse water containing formulated cleaning agent and soils was found to be very good. Therefore, the cleaning agents formulated in this work seemed to have good cleaning efficiency to have economical advantage and water pollution reduction by recycling the rinse water.

본 연구에서는 유기용매의 종류 및 함량, 계면활성제의 종류 및 함량, 보조계면활성제/계면활성제(cosurfactant/surfactant, A/S) 비율 등의 변수에 따라 배합된 마이크로에멀젼형의 준수게 세정제들의 물리적 특성과 플럭스에 대한 용해력을 측정하였다. 또한, 세정공정 중에 사용되는 헹굼액의 유수분리성을 측정하여 헹굼액의 재활용성을 평가하였다. 배합된 세정제들은 water-in-oil (W/O) 형태의 마이크로에멀젼을 형성하였으며, 30.2~32.5 dyne/cm의 낮은 표면장력과 낮은 점도 값을 보여 세정공정에서 침투력이 좋을 것으로 예상되었다. 플럭스에 대한 용해력은 계면활성제의 소수성이 증가할수록 높게 나타났으며 terpene을 함유란 세정제들이 hydrocarbon 형태의 세정제와 대응품(CPA, CPB)에 비해 우수한 용해력을 보였다. 그리고, 배합된 세정제들을 함유한 헹굼액은 우수한 유수분리성을 보여 헹굼액의 재활용이 가능하여 경제적인 부담과 수질오염을 줄일 수 있음을 보여주었다.