Parameters concerning the microemulsion phase behavior of nonionic surfactants of the alkyl polyglycol ether type have extensively been investigated in the last years. By studying these, essential parameters for future applications can be determined. Especially in the field of enhanced oil recovery, lubricants, and cosmetic applications these parameters are of special interest. In this work, the influence of technical grade nonionic surfactants on the phase behavior and the resulting surfactant efficiency has been studied. For this, the alkyl chain length, the degree, type, and order of alkoxylation of the surfactant have been varied. The investigation of these parameters has been conducted by measuring the phase behavior via the Kahlweit fish diagram. It has been found that varying the C-chain length has a great impact on the efficiency, whereas the influence of the ethoxylation degree is minor. By the introduction of propylene oxide, the efficiency has been improved significantly. Additionally, it is important to have the right order of alkoxylation. If the fatty alcohol is first ethoxylated and afterwards propoxylated the efficiency is significantly decreased.

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工业级非离子表面活性剂效能研究

关于烷基聚乙二醇醚型非离子表面活性剂的微乳液相行为的参数在过去几年中得到了广泛的研究。通过研究这些，可以确定未来应用的基本参数。特别是在提高采油率、润滑剂和化妆品应用领域，这些参数特别受关注。在这项工作中，研究了工业级非离子表面活性剂对相行为和由此产生的表面活性剂效率的影响。为此，改变了表面活性剂的烷基链长度、程度、类型和烷氧基化顺序。通过 Kahlweit 鱼图测量相行为，对这些参数进行了研究。已经发现，改变 C 链长度对效率有很大影响，而乙氧基化度的影响较小。通过引入环氧丙烷，效率得到显着提高。此外，正确的烷氧基化顺序也很重要。如果脂肪醇首先乙氧基化然后丙氧基化，则效率显着降低。