Facilely control the SDS ability to reduce the interfacial tension via the host-guest recognition

Supramolecular chemistry provides a facile and feasible method to construct desired compounds via noncovalent interactions. Based on the host-guest recognition, the surfactant/cyclodextrin (CD) inclusion exhibited the excellent performance in potential application of various fields. The sodium dodecyl sulfate (SDS)/beta-CD inclusion was introduced to chemical enhanced oil recovery. The fabrication of SDS/beta-CD inclusion seriously affected the SDS ability to reduce the interfacial tension (IFT) between a model oil (toluene and n-decane, v/v = 1:1) and water, which may be the key factor to reduce the adsorption loss of SDS molecules via the addition of beta-CD molecules. To reactivate the interfacial activity of SDS molecules, we employed the adamantanamine chloride (AD) to the SDS/beta-CD inclusion solutions. Interestingly, the electrostatic attraction between AD/beta-CD inclusion and SDS molecule dominated the change tendency of IFT values, which was further verified by the systematical investigations on the salinity and temperature effects on the IFT. (C) 2018 Elsevier B.V. All rights reserved.