SYNTHESIS OF NOVEL ANIONIC-NONIONIC SURFACTANTS AND THEIR INTERACTION WITH HIGHLY INTERFACIAL ACTIVE SURFACTANT18-AC

Abstract

Abstract: anionic-nonionic surfactants with alkyl chains of different number of carbon atoms were synthesized, and the interaction between sodium nonylphenol polyoxyethylene ether sulfate (9-EOS), sodium dodecylphenol polyoxyethylene ether sulfate (12-EOS) and high performance surfactant (18-AC) was studied by surface tension technique. The results showed that there was an antagonistic effect between 9-EOS and 18-AC, while there was a synergistic effect between 12-EOS and 18-AC. In addition, the effects of the compound system on the wettability and oil-water interface properties of the mixtures were systematically studied. The compound system effectively reduced the contact angle on the crude oil surface. When the 12-EOS molar fraction is 0-0.6, the 12-EOS/18-AC system has a synergistic effect on the wettability, the contact angle is lower than that of individual surfactants, and the oil-water interface performance is improved.

Key words: surfactant, intermolecular interaction, synergistic

References

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