氨基磺酸型两性双子表面活性剂的合成及性能

以十二胺、2-氯乙基磺酸钠为主要原料，采用二氯代的亲水性基团作为联结基，制备了新型氨基磺酸型两性双子表面活性剂DAS-3PA和DAS-8EO；用红外光谱对其结构进行了表征，并对其表面活性和油水界面张力进行了测试。结果表明，两性双子表面活性剂表现出优于传统表面活性剂的表面活性，25℃时DAS-3PA和DAS-8EO临界胶束浓度分别达到6．9×10^-5mol／L和8．0×10^-5mol／L，此时界面张力分别降至25．01mN／m和26．17mN／m；DAS两性双子表面活性剂倾向于吸附在油水界面上，并能有效地降低原油与水的界面张力；DAS两性双子表面活性剂与聚合物复配时表现出较好协同效应，此复配二元体系均能将油水界面张力降低至10^-3mN／m以下。

Synthesis and Properties of Novel Amino-sulfonate Amphoteric Gemini Sulfactant

The amino-sulfonate amphoteric gemini surfactant, DAS, was synthesized from dodecyl amine and sodium 2-chloroethyl sulfonate, in which spacer group was made of a kind of hydrophilic group. The structure of the product was characterized with IR. The surface activity and oil-water interface tension of DAS were studied. The test results showed that the amphoteric gemini surfactants （DAS） had surface activity better than traditional surfactants. The CMC of DAS - 3PA and DAS - 8EO were 6.9 × 10^-5 mol/L and 8.0 × 10^ -5mol/L at 25℃ respectively and the corresponding surface tension decreased to 25.01 mN/m and 26. 17 mN/m respectively. The DAS could reduce effectively the oil-water interface tension, since the molecule of the DAS showed a trend of adsorption on the interface between oil and water. The binary system of DAS and polymer could reduce indeed the oil-water interfacial tension to the level of 10^-3 mN/m because of the synergistic effects between the DAS and the polymer.