羟基磺基甜菜碱氟碳表面活性剂在油水界面的扩张粘弹性

doi:10.11944/j.issn.1000-0518.2015.10.150089

摘要/Abstract

摘要：

氟碳表面活性剂是目前表面活性最高的特种表面活性剂,在三次采油等领域具有良好的应用前景。用小幅周期振荡法研究了羟基磺基甜菜碱型氟碳表面活性剂(FS)在油-水界面的扩张粘弹性能,考察了振荡频率、FS质量分数、无机盐(NaCl、CaCl₂、MgCl₂)对FS在油-水界面的扩张粘弹性能的影响。结果表明,FS溶液在油水界面的扩张模量、扩张弹性和扩张粘度随着FS质量分数的增加而出现最大值,随着频率的增大而略有增加。加入无机盐时,扩张模量、扩张弹性随NaCl质量分数增大而出现最大值,而随着CaCl₂或者MgCl₂质量分数的增加,FS溶液的扩张模量、扩张弹性和扩张粘度减小,而当CaCl₂或者MgCl₂质量分数分别为0.05%、0.1%时,tanθ达到最大值。

关键词: 氟碳表面活性剂, 油水界面, 扩张粘弹性, 小幅周期振荡法

Abstract:

Fluorocarbon surfactant as the highest surface active surfactant shows a good potential in enhanced oil recovery area. The dilational rheological properties of perfluorooctane sulfonamide dimethyl ammonium ethanol sulfonate(FS) at the oil/water interface were investigated using the oscillating barriers method at low frequency(0.033~0.1 Hz). Many factors, such as the oscillating frequency, bulk concentration and salts, greatly affect the dilational rheological properties. The results reveal that the dilational modulus and elasticity increase and the dilational viscosity slightly increase as the dilational frequency increases. The dilational modulus passes through a maximum value with the FS concentration increasing. Additionally, adding a moderate concentration of NaCl can increase the FS dilational modulus, while adding CaCl₂ or MgCl₂ yields opposite results, and the concentration of CaCl₂ or MgCl₂ reaches to 0.05% and 0.1%, respectively, tanθ is less than 45°.

Key words: fluorosurfactant, oil-water interface, dilational viscoelastic properties, oscillating barriers method

李亮,王彦玲,张建军,金家锋,路以文,马剡,郑晶晶. 羟基磺基甜菜碱氟碳表面活性剂在油水界面的扩张粘弹性[J]. 应用化学, 2015, 32(10): 1190-1195.

LI Liang,WANG Yanling,ZHANG Jianjun,JIN Jiafeng,LU Yiwen,MA Yan,ZHENG Jingjing. Dilational Rheological Properties of an Amphoteric Fluorocarbon Surfactant at the Oil/Water Interface[J]. Chinese Journal of Applied Chemistry, 2015, 32(10): 1190-1195.

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