University of Bayreuth, BZKG/BayColl, Gottlieb-Keim-Str. 60, 95448 Bayreuth, Germany.
Phys Chem Chem Phys. 2011 Feb 28;13(8):3248-56. doi: 10.1039/c0cp00062k. Epub 2011 Jan 5.
Microemulsion phases have been prepared for the first time from the silicone oil "M(2)" (hexamethyldisiloxane) and a surfactant mixture of a nonionic surfactant "IT 3" (isotridecyltriethyleneglycolether) and an ionic surfactant Ca(DS)(2) (calciumdodecylsulfate). For such a surfactant mixture the hydrophilicity of the system can be tuned by the mixing ratio of the two components. With increasing IT 3 content, the surfactant mixtures show a L(1)-phase, a wide L(α)-region and a narrow L(3) sponge phase. For constant temperature, two single phase channels exist in the microemulsion system. The lower channel (low IT 3 content) ends in the middle of the phase diagram with equal amounts of water and oil, the upper channel begins with the L(3)-phase and passes all the way to the oil phase. Conductivity data show that the upper channel has a bi-continuous morphology up to 40% oil while the lower channel consists of oil droplets in water. In contrast to previous studies on nonionic systems, the two single phase channels are not connected and microemulsions with equal amount of oil and water do not have a bicontinuous structure.
首次从硅油“M(2)”(六甲基二硅氧烷)和非离子表面活性剂混合物 IT 3(异十三烷基三乙氧基醚)和离子表面活性剂 Ca(DS)(2)(十二烷基硫酸钠)制备微乳液相。对于这样的表面活性剂混合物，可以通过两种组分的混合比来调整系统的亲水性。随着 IT 3 含量的增加，表面活性剂混合物呈现 L(1)-相、宽 L(α)-区和窄 L(3)海绵相。对于恒温，微乳液体系中有两个单相通道。较低的通道(低 IT 3 含量)在相图的中间结束，水和油的量相等，较高的通道从 L(3)-相开始，并一直延伸到油相。电导率数据表明，在上通道中，具有双连续形态的油含量高达 40%，而在下通道中则由油滴在水中组成。与以前关于非离子体系的研究相比，两个单相通道不连通，并且油和水含量相等的微乳液没有双连续结构。
