Effect of Polymer Architecture on the Adsorption Properties of a Nonionic Polymer
2008 (English)In: Langmuir, ISSN 0743-7463, E-ISSN 1520-5827, Vol. 24, no 13, 6676-6682 p.Article in journal (Refereed) Published
The adsorption of a linear- and bottle-brush poly(ethylene oxide (PEO))-based polymer, having comparable molecular weights, was studied by means of quartz crystal microbalance with dissipation monitoring ability (QCM-D) and AFM colloidal probe force measurements. The energy dissipation change monitored by QCM-D and the range of the steric forces obtained from force measurements demonstrated that linear PEO forms a more extended adsorption layer than the bottle-brush polymer, despite that the adsorbed mass is higher for the latter. Competitive adsorption studies revealed that linear PEO is readily displaced from the interface by the bottle-brush polymer. This was attributed to the higher surface affinity of the latter, which is governed by the number of contact points between the polymers and the interface, and the smaller loss of conformational entropy.
Place, publisher, year, edition, pages
2008. Vol. 24, no 13, 6676-6682 p.
Adsorption, Bioelectric phenomena, Brushes, Eigenvalues and eigenfunctions, Energy dissipation, Ethylene, Force measurement, Oxide minerals, Photoresists, Quartz, Quartz crystal microbalances, Adsorption layers, Adsorption properties, American Chemical Society (ACS), Competitive adsorption, Conformational entropy, Contact points, Non-ionic, Poly(ethylene oxide-terephthalate) (PEO), Polymer architecture, Quartz crystal microbalance with dissipation monitoring (QCM-D), Surface affinity
IdentifiersURN: urn:nbn:se:kth:diva-8157DOI: 10.1021/la800089vISI: 000257101100041ScopusID: 2-s2.0-47349124527OAI: oai:DiVA.org:kth-8157DiVA: diva2:13405
QC 20100830. Uppdaterad från accepted till published (20100830).2008-03-272008-03-272010-08-30Bibliographically approved