Surface chemistry and adhesion in carbon fiber reinforced epoxy microcomposites
| Autor: | János Gulyás, Imre Bertóti, Béla Pukánszky, László Százdi, Lívia Dányádi |
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| Rok vydání: | 2005 |
| Předmět: |
Materials science
General Physics and Astronomy Infrared spectroscopy Sulfuric acid Epoxy Adhesion Electrochemistry Surfaces Coatings and Films chemistry.chemical_compound Chemical engineering X-ray photoelectron spectroscopy chemistry visual_art Ceramics and Composites visual_art.visual_art_medium Fiber Cyclic voltammetry Composite material |
| Zdroj: | Composite Interfaces. 12:243-258 |
| ISSN: | 1568-5543 0927-6440 |
| DOI: | 10.1163/1568554053971650 |
| Popis: | In an extensive series of experiments, PAN based carbon fiber was subjected to electrochemical oxidation under a wide variety of conditions. In this part of the study, the activity and chemical composition of fibers oxidized in sulfuric acid were characterized by cyclic voltammetry (CV), diffuse reflectance infrared spectroscopy (DRIFT) and X-ray photoelectron spectroscopy (XPS). Interfacial adhesion was measured in epoxy microcomposites by fragmentation. The results proved that the type and amount of functional groups formed on the surface of the fiber depends very much on the conditions of oxidation. In sulfuric acid, a large number of sulfoxides also form besides the usual functional groups containing carbon and oxygen. The surface concentration of all functional groups increases with the intensity of oxidation, but to a different extent. Only a few of them increase interfacial interaction. Sulfur-containing groups and quinoidal compounds are not very reactive, while carboxyl groups seem to be the most... |
| Databáze: | OpenAIRE |
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