Adsorption behavior and cross-linking of EHEC and HM-EHEC at hydrophilic and hydrophobic modified surfaces monitored by SPR and QCM-D
Journal article, 2007

The adsorption behavior of ethyl(hydroxyethyl) cellulose EHEC and hydrophobically modified EHEC (HM-EHEC) at hydrophilic and hydrophobic surfaces has been studied using surface plasmon resonance (SPR) and quartz crystal microbalance with dissipation monitoring (QCM-D) methods. The adsorbed amounts measured with the different methods were different due to large amounts of water in the films. The slow adsorption process made it reasonable to assume a continuous polymer reconfiguration process at the surface. This was mostly seen for HM-EHEC at the hydrophobic surface, where a more flexible structure was adopted during the adsorption process. A cross-linking agent was seen to truly interpolymer cross-link EHEC at the hydrophilic surface and HM-EHEC at the hydrophobic surface. For EHEC at a hydrophobic surface and for HM-EHEC at a hydrophilic surface, the polymers adsorbed in an individually phase-separated manner, making an interpolymer cross-linking reaction unsuccessful.

SURFACTANTS

POLYMER ADSORPTION

PLASMON RESONANCE

POLYSTYRENE

CELLULOSE DERIVATIVES

INTERFACES

ELLIPSOMETRY

ETHYL(HYDROXYETHYL)CELLULOSE

FILM THICKNESS

PHASE-BEHAVIOR

Author

J. Hedin

Chalmers

Jan-Erik Löfroth

Chalmers, Chemical and Biological Engineering, Applied Surface Chemistry

Magnus Nydén

Chalmers, Chemical and Biological Engineering

SuMo Biomaterials

Langmuir

07437463 (ISSN) 15205827 (eISSN)

Vol. 23 11 6148-6155

Subject Categories

Chemical Engineering

DOI

10.1021/la063406j

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Latest update

9/10/2018