Surface and Interfacial Properties and Alteration Behavior of Wetting for a Polymeric Surfactant Containing Fluorine in Aqueous and Brine Solutions

Abstract

Two novel monomers, 1H,1H,2H,2H-perfluoro-1-decyl p-vinylbenzyl ether (VF) and allyl-capped octylphenoxy poly(ethylene oxide) with the polymerization degree of 4 (AE), were synthesized. The polymeric surfactants (PAF) were synthesized with acrylamide, sodium 2-acrylamido-2-methylpropanesulfonate, AE, and VF. PAF could be expected to be applied in enhanced oil recovery to reduce water film on rock surface and interfacial tension for the oil reservoirs with the permeability of 100–10 (10–3 μm2). The introduction of VF together with AE causes PAF to display good interfacial activity and the reduction in wettability of aqueous solutions. Spherical nanometer micelles were formed, and CMC is 0.5 g L–1 in aqueous PAF solutions. The contact angle increased from 50.63° of pure water to 70.71° of 0.2 g L–1 PAF, and the interfacial tension was 0.009 mN m–1 for the 0.1 g L–1 PAF solution with 5 g L–1 NaCl and 0.3 g L–1 PS.