用FT-IR、1H NMR和元素分析对自制的3种磺丁基甜菜碱(SBm-4)的结构进行了表征,研究了它们的表面性能、泡沫性能和乳化性能.获得SB12-4的cmc为2.20×10-3mol/L,γcmc为31.48 mN/m;SB14-4的cmc为2.80×10-4mol/L,γcmc为29.68 mN/m;SB16-4的cmc为2.30×10-5mol/L,γcmc为32.06mN/m.3种磺丁基甜菜碱的cmc值随着烷基链长增加逐渐减小,γcmc先减小后增加,三者的起泡性随浓度增加而增加,到一定值后保持不变;泡沫稳定性随浓度增加逐渐增强,起泡性随着温度的增加有缓慢增加趋势,泡沫稳定性随温度增加逐渐降低.3种表面活性剂的乳化能力随浓度增加先增加后降低.
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