Contact
    Start Publications Effect of polymer architecture on the adsorption properties of ...
    ←  Publication Finder
    QSense

    Effect of polymer architecture on the adsorption properties of a nonionic polymer

    Year: 2008

    Journal: Langmuir. 2008 Jun 1;24(13):6676-82, 20100827

    Authors: Naderi A, Iruthayaraj J, Pettersson T, Makuska R, Claesson PM.

    Organizations: Department of Chemistry, Surface Chemistry, Royal Institute of Technology, SE-100 44 Stockholm, Sweden. ali.naderi@surfchem.kth.se

    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.