Surface Plasmon Resonance Studies of Pullulan and Pullulan Cinnamate Adsorption onto Cellulose
| Autor: | Zelin Liu, Thomas Heinze, Alan R. Esker, Abdulaziz Kaya, John R. Morris, Wolfgang G. Glasser, Xiaosong Du, Jessica W. Lu |
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| Rok vydání: | 2009 |
| Předmět: |
Langmuir
Polymers and Plastics Surface Properties technology industry and agriculture Regenerated cellulose Bioengineering Pullulan Surface Plasmon Resonance Biomaterials chemistry.chemical_compound Adsorption chemistry Chemical engineering Cinnamates Monolayer Materials Chemistry Organic chemistry Freundlich equation Sulfhydryl Compounds Cellulose Surface plasmon resonance Glucans Protein Binding |
| Zdroj: | Biomacromolecules. 10:2451-2459 |
| ISSN: | 1526-4602 1525-7797 |
| DOI: | 10.1021/bm900412g |
| Popis: | Surface plasmon resonance studies showed pullulan cinnamates (PCs) with varying degrees of substitution (DS) adsorbed onto regenerated cellulose surfaces from aqueous solutions below their critical aggregation concentrations. Results on cellulose were compared to PC adsorption onto hydrophilic and hydrophobic self-assembled thiol monolayers (SAMs) on gold to probe how different interactions affected PC adsorption. PC adsorbed onto methyl-terminated SAMs (SAM-CH(3))cellulosehydroxyl-terminated SAMs (SAM-OH) for high DS and increased with DS for each surface. Data for PC adsorption onto cellulose and SAM-OH surfaces were effectively fit by Langmuir isotherms; however, Freundlich isotherms were required to fit PC adsorption isotherms for SAM-CH(3) surfaces. Atomic force microscopy images from the solid/liquid interfaces revealed PC coatings were uniform with surface roughnesses2 nm for all surfaces. This study revealed hydrogen bonding alone could not explain PC adsorption onto cellulose and hydrophobic modification of water-soluble polysaccharides was a facile strategy for their conversion into surface modifying agents. |
| Databáze: | OpenAIRE |
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