화학공학소재연구정보센터
Applied Chemistry, Vol.4, No.2, 231-234, November, 2000
비이온 계면활성제 수용액의 담점(Cloud point)에 관한 첨가제 영향
The Effects of Various Foreign Substances on the Cloud Point of Nonionic Surfactant Aqueous Solution
In order to develop the precipitation process of polytetrafluoroethylene(PTFE) dispersion using nonionic surfactants, the effect of the surfactants and additives on the cloud point(CP) of the nonionic surfactant solution were investigated. It was also shown that the higher value of CP as the number of EO group of the nonionic surfactant increases. Various additives added to these surfactant solutions significantly affected the CP: the CP was decreased by the addition of the electrolytes and the univalent cations of the added electrolytes were more active than the polyvalent cations, the order of decreasing effect was NaCl>MnCl2>CrCl3; whereas the CP increased remarkably by the addition of the ionic surfactants and the fluorinated surfactant(ammonium perfluorootanoate) was more effective than the hydn surfactant(sodium dodecyl sulfate).