In this work, we report a facile synthesis of four fluorinated zwitterionic heterogemini surfactants bearing branched CF₃CF₂CF₂C(CF₃)₂- group with perfluoro-2-methyl-2-pentene as starting material. The surface activities of as-prepared four surfactants were found to be better than that of sodium perfluorooctanoate. Meanwhile, our fluorinated surfactants with double hydrophobic chains showed much better surface activities than the monomeric fluorinated surfactant. With the introduction of an alkyl chain, the CMC could be reduced more than 200 times to 6.30 × 10⁻⁵ mol/L, together with a surface tension of 18.66 mN/m. When a new fluorinated chain was introduced in the molecular structure, the CMC could be as low as 1.74 × 10⁻⁶ mol/L, along with a surface tension of 18.42 mN/m. When the alkyl chain length is 7, the surfactant has the same ability with the double fluorinated chain one to reduce the surface tension.

在这项工作中，我们报告了以全氟-2-甲基-2-戊烯为起始原料轻松合成带有支链CF ₃ CF ₂ CF ₂ C（CF ₃）_2-基团的四种氟化两性离子杂双子表面活性剂的方法。发现所制备的四种表面活性剂的表面活性优于全氟辛酸钠的表面活性。同时，我们的具有双疏水链的氟化表面活性剂比单体氟化表面活性剂具有更好的表面活性。通过引入烷基链，CMC可以减少200倍以上，达到6.30×10 ^-5mol / L，以及18.66 mN / m的表面张力。当在分子结构中引入新的氟化链时，CMC可能低至1.74×10 ^-6 mol / L，表面张力为18.42 mN / m。当烷基链长为7时，表面活性剂具有与双氟化链相同的降低表面张力的能力。