Contact
    Start Publications Poly(Oxyethylene)-Amidoamine Based Gemini Cationic Surfactants ...
    ←  Publication Finder
    Attension

    Poly(Oxyethylene)-Amidoamine Based Gemini Cationic Surfactants for Oilfield Applications: Effect of Hydrophilicity of Spacer Group

    Year: 2020

    Journal: Materials, Volume 13, MAR

    Authors: Hussain, S. M. Shakil; Mahboob, Ahmad; Kamal, Muhammad Shahzad

    Organizations: College of Petroleum Engineering & Geoscience (CPG), King Fahd University of Petroleum & Minerals, through a joint project with UT Austin [CPG-17-0124]; College of Petroleum Engineering Geoscience

    Keywords: poly(oxyethylene); synthesis; thermal; surface; oilfield

    Thermal stability, salt tolerance, and solubility in normal and high salinity brine are the major requirements for any surfactant designed for oilfield applications because the surfactant stays in a non-ambient environment inside the reservoir for a long period of time. Herein, a series of new gemini cationic surfactants (GSs) with varying spacer hydrophilicity were synthesized and elucidated using MALDI-ToF-MS, NMR (1H, 13C), as well as FTIR spectroscopy. GSs found to be soluble in normal as well as high salinity brine and aqueous stability tests revealed that GSs possess the ability to retain their structural integrity at high salinity and high temperature conditions because no suspension formation or precipitation was detected in the oven aged sample of GSs at 90 degrees C for 30 days. Thermal gravimetric analysis displayed a higher decomposition temperature than the real reservoir temperature and the GS with a secondary amine spacer exhibited high heat stability. The significant reduction in surface tension and critical micelle concentration was observed using 1 M NaCl solution in place of deionized water. The difference in surface tension and critical micelle concentration was insignificant when the 1 M NaCl solution was replaced with seawater. The synthesized surfactants can be utilized for oilfield applications in a challenging high temperature high salinity environment.
    View publication