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Citation: 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. doi: 10.11944/j.issn.1000-0518.2015.10.150089 shu

Dilational Rheological Properties of an Amphoteric Fluorocarbon Surfactant at the Oil/Water Interface

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a Research Institute of Engineering Technology, Northwest Oilfieid Company, SINOPEC, Urumqi 830011, China;
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b College of Petroleum Engineering, China University of Petroleum(East China), Qingdao, Shandong 266555, China;
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c Tahe Oil Production Plant Technology, Northwest Oilfieid Company, SINOPEC, Luntai, Xinjiang 841600, China

Corresponding author: LI Liang,
Received Date: 10 March 2015
Available Online: 22 May 2015
Fund Project: 国家杰出青年科学基金(50925414)资助 (50925414)

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 Na Cl can increase the FS dilational modulus,while adding CaCl₂ or MgCl₂ yields opposite results,and the concentration of Ca Cl₂ or Mg Cl₂ reaches to 0.05% and 0.1%,respectively,tanθ is less than 45°.
- fluorosurfactant,
- oil-water interface,
- dilational viscoelastic properties,
- oscillating barriers method
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