Preparation and performance evaluation of a novel temperature-resistant anionic/nonionic surfactant

表面张力 肺表面活性物质 接触角 吸附 临界胶束浓度 水溶液 润湿 傅里叶变换红外光谱 电喷雾电离 烷基 化学 红外光谱学 质谱法 分析化学(期刊) 核化学 材料科学 胶束 色谱法 化学工程 有机化学 量子力学 物理 工程类 生物化学 复合材料
作者
Yongwei Duan,Yanpeng Li,Bo-Ru Chen,Chi Ai,Jun Wu
出处
期刊:Scientific Reports [Nature Portfolio]
卷期号:14 (1) 被引量:2
标识
DOI:10.1038/s41598-024-56342-5
摘要

Abstract Aiming at oil extraction from a tight reservoir, the Jilin oil field was selected as the research object of this study. Based on the molecular structures of conventional long-chain alkyl anionic surfactants, a new temperature-resistant anionic/nonionic surfactant (C 8 P 10 E 5 C) was prepared by introducing polyoxyethylene and polyoxypropylene units into double-chain alcohols. The resulting structures were characterized by Fourier transform infrared spectroscopy (FT-IR), nuclear magnetic resonance spectroscopy ( 1 H-NMR), and electrospray ionization mass spectrometry (ESI–MS). Then, based on surface tension, interfacial tension, adsorption resistance, wettability, and emulsification performance tests, the performance of C 8 P 10 E 5 C was evaluated. The FT-IR, ESI–MS, and NMR spectra confirmed that C 8 P 10 E 5 C was successfully prepared. The critical micelle concentration (CMC) of C 8 P 10 E 5 C in water was 2.9510 × 10 −4 mol/L (the corresponding mass concentration is 0.26%), and the surface tension of the aqueous C 8 P 10 E 5 C solution at this concentration was 30.5728 mN/m. At 0.3% concentration, the contact angle of the C 8 P 10 E 5 C solution was 31.4°, which is 60.75% lower than the initial contact angle. Under high-temperature conditions, C 8 P 10 E 5 C can still reduce the oil–water interfacial tension to 10 −2 mN/m, exhibiting good temperature resistance. At 110 °C, upon adsorption to oil sand, the C 8 P 10 E 5 C solution could reduce the oil–water interfacial tension to 0.0276 mN/m, and the interfacial tension can still reach the order of 10 −2 mN/m, indicating that C 8 P 10 E 5 C has strong anti-adsorption capability. Additionally, it has good emulsifying performance; upon forming an emulsion with crude oil, the highest drainage rate was only 50%. The forced imbibition oil recovery of C 8 P 10 E 5 C is 65.8%, which is 38.54, 24.22, and 27.25% higher than those of sodium dodecyl benzene sulfonate, alkyl polyoxyethylene ether carboxylate, and alkyl ether carboxylate, respectively.
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