Abstract
The effect of surfactants on the adsorption properties of ethyl(hydroxyethyl) cellulose (EHEC) and its hydrophobically modified analogue (HM-EHEC) at the solid-liquid interface has been studied by ellipsometry. On the polar silica surface, a small addition of the anionic surfactant sodium dodecyl sulphate (SDS) caused a threefold to fivefold expansion of a preadsorbed HM-EHEC layer, while the amount adsorbed was influenced less. On the hydrophobised silica surface, SDS could replace EHEC ( above 10 mM SDS), while some adsorbed HM-EHEC could still be detected at 14 mM SDS. The nonionic surfactant octa(ethylene oxide) dodecyl ether did not affect the adsorbed layer structure on silica. It is proposed that the layer structure is governed by polymer—surfactant interactions and/or competitive adsorption, depending on the adsorption characteristics of the individual cosolutes.
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Joabsson, F., Lindman, B. (2000). Interfacial interaction between ethyl(hydroxyethyl) cellulose and sodium dodecyl sulphate. In: Razumas, V., Lindman, B., Nylander, T. (eds) Surface and Colloid Science. Progress in Colloid and Polymer Science, vol 116. Springer, Berlin, Heidelberg. https://doi.org/10.1007/3-540-44941-8_12
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DOI: https://doi.org/10.1007/3-540-44941-8_12
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