合成了疏水链长度不同和连接基长度不同的7种系列阴离子孪连表面活性剂,研究了它们的表/界面活性。结果表明,它们有较低的表面张力和临界胶束浓度(CMC),有很好的表面活性。它们的CMC都在10-5~10-6mol/L之间,表面张力在26·5~34mN/m之间。它们有非常好的抗一价、二价盐的能力。除了C16-C2-C16在高于5%的NaCl溶液中会产生析出外,其余孪连表面活性剂都能耐盐20%以上。随着盐浓度的增加,孪连表面活性剂与烷烃间的界面张力逐渐降低,能达到10-3mN/m。与中原油田原油间的界面张力能降低到10-3~10-4mN/m,表明它们可应用于特高矿化度油藏提高采收率。 Seven series of anionic gemini surfactants with different hydrophobic chains and different linker lengths were synthesized and their surface / interfacial activity was studied. The results show that they have lower surface tension and critical micelle concentration (CMC), have good surface activity. Their CMC are between 10-5 ~ 10-6mol / L, the surface tension between 26 · 5 ~ 34mN / m. They have very good resistance to monovalent, divalent salts. Except that C16-C2-C16 will be precipitated in more than 5% NaCl solution, all other Gemini surfactants can tolerate more than 20% salt. With the increase of salt concentration, the interfacial tension between Gemini surfactant and alkane decreases gradually, which can reach 10-3mN / m. The interfacial tension with the crude oil of Zhongyuan Oilfield can be reduced to 10-3 ~ 10-4mN / m, indicating that they can be applied to the extra-high salinity reservoir to enhance oil recovery.