期刊
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
卷 653, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.colsurfa.2022.129971
关键词
Double-tailed ferrocenyl surfactants; Redox trigger; EOR; Interfacial activity; Supramolecular assembly
资金
- National Natural Science Foundation of China, China [52174053, 52130401]
- Natural Science Foundation of Shandong Provincial, China [ZR2019MEE077]
- China Scholarship Council [202106450020]
In this study, reversible redox-responsive double-tailed ferrocenyl surfactants were fabricated to address the issues faced by traditional surfactants in enhanced oil recovery. The surfactants demonstrated superior interfacial activity that could be accurately switched by redox triggers. The experiments showed that these surfactants could emulsify kerosene in pore media and be recycled by the addition of Na2SO3.
Stimuli responsive surfactants with reversible properties may effectively solve the problems of traditional surfactants (the switching of interfacial activity and the demulsification difficulty of emulsions) in enhanced oil recovery (EOR). In the present study, we fabricate brand-new redox-responsive double-tailed ferrocenyl surfactants 1,1'-ferrocenedicarboxylic acid-(N,N-dimethyldodecylamine) 2 (FDA-(DMDA)(2)) via the dynamic supramolecular assembly. The reversible redox-responsive interfacial behaviors of ferrocenyl surfactants are estimated by measuring the interfacial tension reduction capacity, emulsifying performance, and wettability reversal ability. Compared with oxidized single-tailed ferrocenyl surfactant (FA-DMDA-Ox), oxidized double-tailed ferrocenyl surfactant (FDA-(DMDA)(2)-Ox) displays higher interfacial activity, which can be accurately switched by redox trigger. Cyclic micromodel flooding tests show that the FDA-(DMDA)(2)-Ox can in-situ emulsify the kerosene in pore media, and the addition of Na2SO3 to the produced fluid can achieve the recycle of the surfactants. Oil displacement tests demonstrate that the developed double-tailed ferrocenyl surfactants possess the potential in EOR and recycling.
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