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Title:Adsorption of fucoidan and chitosan sulfate on chitosan modified PET films monitored by QCM-D
Authors:Indest, Tea (Author)
Laine, Janne (Author)
Johansson, Leena Sisko (Author)
Stana-Kleinschek, Karin (Author)
Strnad, Simona (Author)
Dworczak, Renate (Author)
Ribitsch, Volker (Author)
Files:URL http://dx.doi.org/10.1021/bm801361f
 
Language:English
Work type:Unknown ()
Typology:1.01 - Original Scientific Article
Organization:FS - Faculty of Mechanical Engineering
Abstract:The adsorption behavior of fucoidan as well as chitosan derivatives (chitosan sulfate) on poly(ethylene terephthalate) (PET) model film surface was studied using the quartz crystal microbalance technique. These systems were chosen for this study due to their promising biocompatible properties. Moreover, fucoidan and chitosan sulfate have promising anticoagulant properties and represent an alternative to heparin treatment of vascular grafts. As a first step, PET foils were activated by alkaline hydrolysis to increase their hydrophilicity. From these foils, model PET films were prepared by the spin coating technique on a silica quartz crystal. The selected polysaccharides (chitosan, fucoidan, and chitosan sulfate) were adsorbed from aqueous solutions on the PET surfaces. The adsorption was monitored using a quartz crystal microbalance with a dissipation unit. The surface chemistry and morphology of the chitosan/fucoidan or chitosan/chitosan sulfate coated PET-H films was analyzed using XPS and AFM. It was found that chitosan/fucoidan films were thinner and more compressed, while in the case of chitosan/chitosansulfate, large amounts of chitosan sulfate were adsorbed, indicating a loose and thick adsorbed film.
Keywords:PET films, fucoidan, chitosan sulfate, adsorption, anticoagulant properties
Year of publishing:2009
UDC:677.1.017
ISSN on article:1525-7797
COBISS_ID:13016086 New window
NUK URN:URN:SI:UM:DK:R9DXYJUC
Views:1449
Downloads:84
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Categories:Misc.
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Record is a part of a journal

Title:Biomacromolecules
Publisher:American Chemical Society
ISSN:1525-7797
COBISS.SI-ID:22445317 New window

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