Charge-Directed Fiber Surface Modification by Molecular Assemblies of Functional Polysaccharides
| Autor: | Pedro Fardim, Elina Heikkilä, Cíntia Salomão Pinto Zarth, Thomas Heinze, Holger Wondraczek, Beatriz Vega |
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| Rok vydání: | 2013 |
| Předmět: |
Sulfates
Surface Properties Surfaces and Interfaces Condensed Matter Physics Polyelectrolyte Absorption Secondary ion mass spectrometry chemistry.chemical_compound Adsorption chemistry X-ray photoelectron spectroscopy Chemical engineering Electrochemistry Surface modification General Materials Science Fiber Cellulose Absorption (chemistry) Spectroscopy |
| Zdroj: | Langmuir. 29:13388-13395 |
| ISSN: | 1520-5827 0743-7463 |
| DOI: | 10.1021/la402116j |
| Popis: | Molecular assemblies, namely, polyelectrolyte complexes (PECs) composed of negatively charged xylan-based derivatives and a novel positively charged cellulose derivative (CN(+)), were used for interfacial modification of wood fibers by charge directed self-assembly. The adsorption process was studied using polyelectrolyte titration and elemental analysis. X-ray spectroscopy (XPS) and time-of-flight secondary ion mass spectrometry (ToF-SIMS) were used as advanced techniques for the characterization of the modified fiber surfaces. The measurements revealed an intense interaction between the pulp fibers and PECs, and provided essential information for a better understanding of the adsorption process. The information gathered on this paper might contribute to the basis for the development of new value added products by the use of underutilized biomass. |
| Databáze: | OpenAIRE |
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