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首页> 外文期刊>Journal of Applied Polymer Science >Evaluation of nanoemulsions based on silicone polyethers for demulsification of asphaltene model emulsions
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Evaluation of nanoemulsions based on silicone polyethers for demulsification of asphaltene model emulsions

机译：基于有机硅聚醚的纳米乳液在沥青质模型乳液破乳中的评价

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摘要

Asphaltenes are considered the main agents responsible for stabilizing petroleum emulsions. However, due to the complex chemical nature of crude oil, it is necessary to extract these molecules and prepare model solutions to investigate the effects of the various asphaltenes separately. In this study, the demulsification efficiency of oil-in-water (O/W) nanoemulsions based on silicone polyethers was evaluated using asphaltene model emulsions. The interfacial properties of the model emulsions were evaluated, with and without the presence of the nanoemulsions, by interfacial tension and inerfacial rheology measurements and correlating them with the ability and/or speed of diffusion to the interface. Dispersion/flocculation tests of the asphaltenes were performed to assess whether the nanoemulsions were modifying the aggregation state of the asphaltenes during the process of destabilizing the model emulsions. Through the interfacial rheology tests of the model asphaltene/saltwater system, with or without addition of the systems used in the demulsification tests, it was possible to determine the influence of the nanoemulsions on the mechanical properties of the interfacial film. The results of the water/oil gravitational separation tests showed that the nanoemulsions had separation efficiency between 80 and 95%, depending on the composition of the water/surfactant/oil/asphaltene system. The nanoemulsions containing xylene as the oil phase destabilized the emulsions the fastest. (C) 2016 Wiley Periodicals, Inc.
机译：沥青质被认为是稳定石油乳液的主要试剂。但是，由于原油的复杂化学性质，有必要提取这些分子并准备模型溶液以分别研究各种沥青质的作用。在这项研究中，使用沥青质模型乳液评估了基于有机硅聚醚的水包油（O / W）纳米乳液的破乳效率。通过界面张力和界面流变学测量并将它们与扩散至界面的能力和/或速度相关联，来评估在存在和不存在纳米乳液的情况下，模型乳液的界面性质。进行沥青质的分散/絮凝测试，以评估纳米乳液是否在稳定模型乳液的过程中改变了沥青质的聚集状态。通过模型沥青质/盐水系统的界面流变学测试（添加或不添加破乳测试中使用的系统），可以确定纳米乳液对界面膜机械性能的影响。水/油重力分离测试的结果表明，取决于水/表面活性剂/油/沥青质体系的组成，纳米乳液的分离效率在80％至95％之间。含有二甲苯作为油相的纳米乳液使乳液的不稳定最快。 （C）2016威利期刊公司

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