【摘要】 以月桂酸、十八胺和聚乙二醇500为原料通过磺化、酯化和酯交换反应合成了非对称两性双子表面活性剂α-磺基月桂酸聚氧乙烯醚十八烷基氨基丙酸单酯磺酸盐(NSG)。通过红外光谱分析确定了产物结构,并对其物化性能进行了测定。结果表明:NSG的γcmc=48.81 mN/m,cmc=0.000 1 mmol/L;即时泡沫高度为30 mm,5 min后为20 mm;润湿时间为19.6 s;乳化时间为24.82 s(甲苯/水)和20.63 s(豆油/水)。更多还原

【Abstract】 By using lauric acid,stearyl amine and PEG-500 as the starting materials,a kind of asymmetric ampholytic dimeric surfactant NSG was synthesized through sulfonation,esterification and ester interchange reaction.The structure of NSG was characterized by IR spectrum.Physico-chemical properties of NSG were measured.The results showed that the critical surface tension(γ_cmc) of NSG is 48.81 mN/m.The critical micelle concentration of NSG is 0.000 1 mmol/L.The height of foam is 30 mm at the beginning and 20 mm after 5 min.Wetting power of NSG is 19.6 s.Emulsifying power of NSG is（24.82 s） in toluene/water system and 20.63 s in soybean oil/water system.更多还原