Home Effect of Oxyethylene Groups of Fatty Alcohol Polyoxyethylene Ether Sodium Sulfates on Equilibrium and Dynamic Surface Tension in Relation to Wetting Properties
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Effect of Oxyethylene Groups of Fatty Alcohol Polyoxyethylene Ether Sodium Sulfates on Equilibrium and Dynamic Surface Tension in Relation to Wetting Properties

  • Xiaodan Ren

    Xiaodan Ren is working at China Research Institute of Daily Chemistry Co., Ltd. Her research interests are in surfactants, including the structure, formation mechanism of aggregates and physicochemical properties.

    , Ping Li

    Ping Li is working at China Research Institute of Daily Chemistry Co., Ltd. Her research interests are in surfactants, including the structure, formation mechanism of aggregates and physicochemical properties.

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    , Jianbo Li

    Jianbo Li is working at China Research Institute of Daily Chemistry Co., Ltd. His research interests are in surfactants, including the structure, formation mechanism of aggregates and physicochemical properties.

    , Xiaoyi Yang

    Xiaoyi Yang is working at China Research Institute of Daily Chemistry Co., Ltd. His research interests are in surfactants, including the structure, formation mechanism of aggregates and physicochemical properties.

    , Chaohua Guo

    Chaohua Guo is working at China Research Institute of Daily Chemistry Co., Ltd. His research interests are in surfactants, including the structure, formation mechanism of aggregates and physicochemical properties.

    and Quanhong Li

    Quanhong Li is working at China Research Institute of Daily Chemistry Co., Ltd. His research interests are in surfactants, including the structure, formation mechanism of aggregates and physicochemical properties.

Published/Copyright: September 25, 2021
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Abstract

The effect of hydrophilic chain of surfactants fatty alcohol polyoxyethylene ether sodium sulphates (AEnS, n = 2, 3, 7) on surface properties and wetting properties was investigated by the measurement of equilibrium surface tension, dynamic surface tension and dynamic contact angle. The fatty alcohol polyoxyethylene ether sodium sulphates with different head group sizes were used. From the results of equilibrium surface tension measurements, we could obtain the critical micellisation concentration, adsorption efficiency, maximum surface excess concentration and Langmuir equilibrium adsorption constant at air/liquid interface. The dynamic surface tension results showed that the adsorption of aqueous solutions at the air/liquid interface follows a mixed-diffusion kinetic adsorption mechanism. In conclusion, for both studied surfactant, the longer the oxyethylene chains, the higher the maximum rate of surface tension reduction, the higher the diffusivity and wetting properties in terms of contact angle.

Zusammenfassung

Der Einfluss der hydrophilen Kette von Fettalkoholpolyoxyethylenether-Natriumsulfaten (AEnS mit n = 2, 3, 7) auf die Oberflächen- und die Benetzungseigenschaften wurde durch die Messung der Gleichgewichtsoberflächenspannung, der dynamischen Oberflächenspannung und des dynamischen Kontaktwinkels untersucht. Dabei wurden Fettalkoholpolyoxyethylenether-Natriumsulfate mit unterschiedlich großen Kopfgruppen eingesetzt. Aus den Ergebnissen der Gleichgewichtsoberflächenspannungsmessungen konnte die kritische Mizellenbildungskonzentration, die Adsorptionseffizienz, die maximale Oberflächenüberschusskonzentration und die Langmuir-Gleichgewichtsadsorptionskonstante an der Luft/Flüssigkeits-Grenzfläche ermittelt werden. Die Ergebnisse der dynamischen Oberflächenspannung zeigten, dass die Adsorption wässriger Lösungen an der Luft/Flüssigkeits-Grenzfläche einem gemischt-diffusionskinetischen Adsorptionsmechanismus folgt. Zusammenfassend lässt sich für die untersuchten Tenside sagen, dass je länger die Oxyethylenketten sind, umso höher ist die maximale Rate der Reduktion der Oberflächenspannung, desto höher sind die Diffusivität und die Benetzungseigenschaften in Bezug auf den Kontaktwinkel.


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About the authors

Xiaodan Ren

Xiaodan Ren is working at China Research Institute of Daily Chemistry Co., Ltd. Her research interests are in surfactants, including the structure, formation mechanism of aggregates and physicochemical properties.

Dr. Ping Li

Ping Li is working at China Research Institute of Daily Chemistry Co., Ltd. Her research interests are in surfactants, including the structure, formation mechanism of aggregates and physicochemical properties.

Jianbo Li

Jianbo Li is working at China Research Institute of Daily Chemistry Co., Ltd. His research interests are in surfactants, including the structure, formation mechanism of aggregates and physicochemical properties.

Xiaoyi Yang

Xiaoyi Yang is working at China Research Institute of Daily Chemistry Co., Ltd. His research interests are in surfactants, including the structure, formation mechanism of aggregates and physicochemical properties.

Chaohua Guo

Chaohua Guo is working at China Research Institute of Daily Chemistry Co., Ltd. His research interests are in surfactants, including the structure, formation mechanism of aggregates and physicochemical properties.

Quanhong Li

Quanhong Li is working at China Research Institute of Daily Chemistry Co., Ltd. His research interests are in surfactants, including the structure, formation mechanism of aggregates and physicochemical properties.

Acknowledgements

We gratefully acknowledge the financial support from National Key Research and Development Project (2017YFB0308802).

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Received: 2020-12-24
Accepted: 2021-05-11
Published Online: 2021-09-25
Published in Print: 2021-09-30

© 2021 Walter de Gruyter GmbH, Berlin/Boston, Germany

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