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Updated: Feb 20, 2026

Enhanced Oil Recovery using a Combination of Biosurfactants
Published on: June 3, 2022
Polyoxyethylene alkyl ether carboxylic acids: An overview of a neglected class of surfactants with multiresponsive
1Technische Universität Berlin, Stranski Laboratorium für Physikalische Chemie und Theoretische Chemie, Institut für Chemie, Straße des 17. Juni 124, Sekr. TC7, D-10623 Berlin, Germany; Institut Max von Laue - Paul Langevin, Large Scale Structures Group, 71 avenue des Martyrs, Grenoble Cedex 9 38042, France.
Abstract:
In this work, an overview on aqueous solutions of polyoxyethylene alkyl ether carboxylic acids is given. Unique properties arise from the combination of the nonionic, temperature-responsive polyoxyethylene block with the weakly ionic, pH-responsive carboxylic acid termination in a single surfactant headgroup. Accordingly, this class of surfactant finds broad application across very different sectors. Despite their large use on an industrial and a technical scale, the literature lacks a systematic and detailed characterization of their physico-chemical properties which is provided herein. In addition, a comprehensive overview is given of their self-assembly and interfacial behavior, of their use as colloidal building blocks and for large-scale applications.
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