Role of ion ligands in the attachment of poly(ethylene oxide) to a charged surface

Liraz Chai; Jacob Klein

doi:10.1021/ja043963x

Role of ion ligands in the attachment of poly(ethylene oxide) to a charged surface

Liraz Chai, Jacob Klein^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

34 Scopus citations

Abstract

Using a surface force balance we demonstrate unambiguously that high-molecular-weight poly(ethylene oxide) (PEO) does not adsorb onto mica from purified water with no added salt, a surprising observation in view of its strong adsorption on mica from aqueous 0.1 M KNO₃ solution. Analysis of the force profiles, together with the known complexation of PEO with metal ions, suggests that the polymer attachment to the negatively charged surface is mediated by the hydrated potassium ion acting as a ligand.

Original language	English
Pages (from-to)	1104-1105
Number of pages	2
Journal	Journal of the American Chemical Society
Volume	127
Issue number	4
DOIs	https://doi.org/10.1021/ja043963x
State	Published - 2 Feb 2005
Externally published	Yes

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AB - Using a surface force balance we demonstrate unambiguously that high-molecular-weight poly(ethylene oxide) (PEO) does not adsorb onto mica from purified water with no added salt, a surprising observation in view of its strong adsorption on mica from aqueous 0.1 M KNO3 solution. Analysis of the force profiles, together with the known complexation of PEO with metal ions, suggests that the polymer attachment to the negatively charged surface is mediated by the hydrated potassium ion acting as a ligand.

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Role of ion ligands in the attachment of poly(ethylene oxide) to a charged surface

Abstract

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