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以1,2-环氧十四烷烃和几种短碳链二醇为原料,合成了系列二烷基二羟基化合物,然后用氯磺酸作为磺化剂制得5种疏水链相同、连接基团不同的双烷基双硫酸酯钠表面活性剂,并用核磁共振氢谱(1HNMR)、傅立叶变换红外光谱(FTIR)和电喷雾质谱(ESI-MS)对其结构进行了鉴定。用Wilhelmy-Plate法测定了25℃时,5种表面活性剂水溶液的表面张力。实验发现,双直链烷基双硫酸酯钠有很低的临界胶束浓度约10-5mol/L,表明该类表面活性剂具有较好的表面活性。
A series of dialkyl dihydroxy compounds were synthesized from 1,2-epoxytetradecane and several short-chain carbon diols, then the same five kinds of hydrophobic chains were obtained by using chlorosulfonic acid as sulfonating agent. The linker The different dialkyl disulfate sodium surfactants were identified and their structures were identified by 1HNMR, FTIR and ESI-MS. The surface tension of the five surfactant aqueous solutions at 25 ° C was measured by the Wilhelmy-Plate method. It has been found that the sodium bis-linear alkyl disulfonate has a low critical micelle concentration of about 10-5 mol / L, indicating that the surfactant has good surface activity.