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用于提高采收率的智能聚合物纳米胶囊的制备与研究

Preparation and Investigation of Intelligent Polymeric Nanocapsule for Enhanced Oil Recovery.

作者信息

Shi Fang, Wu Jingchun, Zhao Bo

机构信息

Key Laboratory for EOR Technology (Ministry of Education), Northeast Petroleum University, Xuefu Road 99, Daqing 163318, China.

Daqing Oil Field Co., Ltd. No. 6 Oil Production Plant Test Brigade, Daqing 163318, China.

出版信息

Materials (Basel). 2019 Apr 2;12(7):1093. doi: 10.3390/ma12071093.

DOI:10.3390/ma12071093
PMID:30987019
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC6479461/
Abstract

Micro-/nanomotors colloidal particles have attracted increasing interest as composite surfactants, owing to the combined advantages of both Janus solid surfactants and micro-/nanomotors. Here we put micro-/nanomotors colloidal particles into hollow polymeric micro-encapsulates. An intelligent polymeric nanocapsule was prepared for enhanced oil recovery by the self-assembly method. The particle size range of the polymeric capsule can be controlled between 20 to 1000 nm by adjusting the cross-linking thickness of the capsule's outer membrane. The average particle size of polymeric capsules prepared in the study was 300 nm. The structure and properties of the Intelligent polymeric nanocapsule was characterized by a wide range of technics such as Fourier transform infrared spectroscopy, scanning electron microscopy by laser diffraction, fluorescence microscopy, pendant drop tensiometer, laser particle size instrument, and interface tension analyzer. It was found that the intelligent polymeric nanocapsule exhibited significant interfacial activity at the oil-water interface. When the Janus particles' concentration reached saturation concentration, the adsorption of the amphiphilic nanoparticles at the interface was saturated, and the equilibrium surface tension dropped to around 31 mN/m. When the particles' concentration reached a critical concentration of aggregation, the Gibbs stability criterion was fulfilled. The intelligent polymeric nanocapsule system has a better plugging and enhanced oil recovery capacity. The results obtained provide fundamental insights into the understanding of the assembly behavior and emulsifying properties of the intelligent polymeric nanocapsule, and further demonstrate the future potential of the intelligent polymeric nanocapsule used as colloid surfactants for enhanced oil recovery applications.

摘要

微纳马达胶体颗粒作为复合表面活性剂引起了越来越多的关注，这归因于Janus固体表面活性剂和微纳马达的综合优势。在此，我们将微纳马达胶体颗粒放入中空聚合物微胶囊中。通过自组装方法制备了一种用于提高原油采收率的智能聚合物纳米胶囊。通过调节胶囊外膜的交联厚度，聚合物胶囊的粒径范围可控制在20至1000纳米之间。本研究中制备的聚合物胶囊的平均粒径为300纳米。采用傅里叶变换红外光谱、激光衍射扫描电子显微镜、荧光显微镜、悬滴张力仪、激光粒度仪和界面张力分析仪等多种技术对智能聚合物纳米胶囊的结构和性能进行了表征。结果发现，智能聚合物纳米胶囊在油水界面表现出显著的界面活性。当Janus颗粒浓度达到饱和浓度时，两亲性纳米颗粒在界面的吸附达到饱和，平衡表面张力降至约31 mN/m。当颗粒浓度达到临界聚集浓度时，满足吉布斯稳定性判据。智能聚合物纳米胶囊体系具有较好的封堵和提高原油采收率的能力。所得结果为理解智能聚合物纳米胶囊的组装行为和乳化性能提供了基本见解，并进一步证明了智能聚合物纳米胶囊作为胶体表面活性剂在提高原油采收率应用中的未来潜力。

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