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

J. Hedin ; Jan-Erik Löfroth (Institutionen för kemi- och bioteknik, Teknisk ytkemi) ; Magnus Nydén (Institutionen för kemi- och bioteknik ; SuMo Biomaterials)
Langmuir (0743-7463). Vol. 23 (2007), 11, p. 6148-6155.
[Artikel, refereegranskad vetenskaplig]

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.

Nyckelord: CELLULOSE DERIVATIVES, POLYMER ADSORPTION, PLASMON RESONANCE, PHASE-BEHAVIOR, FILM THICKNESS, ELLIPSOMETRY, ETHYL(HYDROXYETHYL)CELLULOSE, POLYSTYRENE, SURFACTANTS, INTERFACES



Denna post skapades 2008-12-10. Senast ändrad 2016-04-07.
CPL Pubid: 80971

 

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Institutioner (Chalmers)

Institutionen för kemi- och bioteknik, Teknisk ytkemi (2005-2014)
Institutionen för kemi- och bioteknik (2005-2014)
SuMo Biomaterials

Ämnesområden

Kemiteknik

Chalmers infrastruktur