双直链烷基二苯甲烷双磺酸盐的合成与性能

Synthesis And Properties Of Di-linear Alkylated

摘要:

以二苯甲烷、系列长链脂肪酰氯（月桂酰氯、豆蔻酰氯、棕榈酰氯）和氯磺酸为主要原料，合成了一类新型阴离子双子表面活性剂---双直链烷基二苯甲烷双磺酸钠盐(DSDM)。通过硅胶层析法对中间产品进行分离提纯，并采用核磁共振氢谱、质谱对其结构进行表征,证明所得产物即为目标产物。测定了DSDM的相关性能，结果表明，C12-DSDM在25℃时，cmc和γcmc分别为1.452 mmol?L-1和38.49 mN?m-1；C14-DSDM、C16-DSDM的界面张力均受温度和硬度的影响，C14-DSDM不受盐浓度的影响，C16-DSDM受盐度影响较大；C14-DSDM、C16-DSDM复配体系可达到9.44?0-3mN/m的超低界面张力。

Abstract:

Di-linear alkylated diphenylmethane sulfonate(DSDM) is a series of new-style anionic gemini surfactants, they have been synthesized from lauric acid, myristic acid , cetylic acid and chlorosulfonic acid as raw materials,and been separated and purificated by silica gel chromatography.The structures of them were characterized by 1H-NMR and MS. The surface tension and oil-water interfacial tension have been measured. The results indicated that the cmc and γcmc is 1.452 mmol?L-1和38.49 mN?m-1 at 25℃ ; The interfacial tension of C14-DSDM、C16-DSDM are affected by temperature and hardness of the water. The interfacial tension of C14-DSDM is not affected by salinity,but the interfacial tension of of C16-DSDM is affected seriously by salinity. themixed surfactant exhibits and ultra-low interfacial tension of 9.44?0-3mN/m.