油相对含氟磺基甜菜碱泡沫性能影响研究

Influence of Kerosene on foams properties of fluorinated sulfobetaine

为了研究油相对氟碳表面活性剂泡沫性能的影响,使用气流法探讨了含油量和气液比对不同浓度的含氟磺基甜菜碱体系的泡沫性能,并通过测量表面与界面张力来分析该泡沫体系在油作用下的消泡方式。结果表明,在表面活性剂质量浓度由0.3%减至0.05%,含油体积由10%增至40%,气液比由3∶1减至1∶3的各个过程中,泡沫的起泡能力和稳定性都下降,一定条件下起泡能力受泡沫稳定性影响。发现假乳状液膜理论能很好的解释泡沫稳定性实验结果。在该泡沫体系中油通过形成不稳定的油桥使泡沫膜破灭。

To study the effect of oil to fluorocarbon surfactant foaming properties,the gas flow method was used to discusses the foaming properties depending on gas-liquid ratio,oil content and concentrations of the fluorinated sulfobetaine. Surface tension and interfacial tension is measured to analyze the way of antifoaming by oil in foams. The results show that in each process of the surfactant concentration from 0. 3%to 0. 05%,the volume of oil from 10% to 40%,the gas-liquid ratio from 3∶ 1 to 1∶ 3,solution foaming and foam stability are decreased. Foaming ability is affected by foam stability. The foam stability results can be well explained by pseudoemulsion film theory. The foam film is ruptured by unstable oil bridge.