以硬脂酸、2-氯乙基磺酸钠、1，3-丙二胺为主要原料，经磺化、酰胺化等反应合成了一种磺酸盐型阴离子双子表面活性剂N，N'-双硬脂酰基-1，3-丙二胺二乙磺酸钠（简称DS18-3-18）。用FT-IR、¹H-NMR对产物进行结构表征，考察了质量分数、剪切速率、温度对磺酸盐双子表面活性剂DS18-3-18溶液黏度的影响，并用扫描电镜（SEM）观察了其微观结构。结果表明，DS18-3-18溶液质量分数越大，其增黏能力越强，DS18-3-18溶液质量分数为4%时经济性最高；增大剪切速率和升高温度，DS18-3-18双子表面活性剂溶液黏度均呈先下降后趋于稳定的状态，表现出较好的耐温抗剪切性能。对DS18-3-18进行微观结构观察发现，DS18-3-18在溶液中自组装形成非常浓密的层状胶束，且胶束之间相互缠结形成类似于网状结构，促进了溶液黏度的增大。

Using stearic acid,sodium 2-chloroethyl sulfonate and 1,3-propanediamine as main raw materials,a sulfonate-type anion gemini surfactant sodium N,N'-bis-stearoyl 1,3-propanediamine sulfonate (DS18-3-18) is synthesized by sulfonation,amidation and other reactions.The structure of the product is characterized by FT-IR and ¹H-NMR and its microstructure is observed through scanning electron microscopy (SEM).The effects of mass fraction,shear rate and temperature on the viscosity of DS18-3-18 solution are investigated.The results show that the higher the mass fraction of DS18-3-18 solution,the stronger the tackifying ability of it;The highest economic efficiency can be achieved when DS18-3-18 solution is 4%;Increasing either shear rate or temperature always cause the viscosity of DS18-3-18 to decline firstly and then tend to be stable,showing a good temperature shear resistance.The microstructure observation for DS18-3-18 reveals that DS18-3-18 can form very dense wormlike micelles in solution through assembling by itself and the micelles entangles with each other to form a net-like structure,which promotes the increase of solution viscosity.

王嘉欣(1993-),男,硕士研究生,研究方向为油气田应用化学,81075897@qq.com。