Preparation of novel bitumen nanocomposites out of polymer-modified montmorillonite nanoparticles
Bitte benutzen Sie diese Kennung, um auf die Ressource zu verweisen:
https://osnadocs.ub.uni-osnabrueck.de/handle/urn:nbn:de:gbv:700-2017080216026
https://osnadocs.ub.uni-osnabrueck.de/handle/urn:nbn:de:gbv:700-2017080216026
Langanzeige der Metadaten
DC Element | Wert | Sprache |
---|---|---|
dc.contributor.advisor | Prof. Dr. Uwe Beginn | |
dc.creator | Belke, Eduard | |
dc.date.accessioned | 2017-08-02T10:03:48Z | |
dc.date.available | 2017-08-02T10:03:48Z | |
dc.date.issued | 2017-08-02T10:03:48Z | |
dc.identifier.uri | https://osnadocs.ub.uni-osnabrueck.de/handle/urn:nbn:de:gbv:700-2017080216026 | - |
dc.description.abstract | To extend the time of service of asphalt roads modified montmorillonite nanoparticles were incorporated into bitumen with the aim of creating a gas barrier inside the bitumen which slows down the diffusion of oxygen through the bitumen. For this purpose [montmorillonite/alkyl-quat-primer] adducts ([MMT/PEI(nkD)xQyR]) were fabricated in which single-montmorillonite platelets were coated by a ultrathin polymer film by reacting montmorillonite particles with poly(ethylenimine) based polycations. The alkyl-quat-primer polymers were synthesised by adding ammonium groups and alkyl chains to hyperbranched poly(ethylenimine)s in a solvent-free reaction. Adducts with fully intercalated polymers were obtained when the polymers were reacted with an aqueous solution of [MMT/CTAB] or by mixing the polymers with montmorillonite and CTAB in an aqueous solution. The polymers replaced the CTAB in an intermediate formed [MMT/CTAB] adduct and adhered strongly to the montmorillonite due to a cooperative electrostatic interaction between the positively charged ammonium moieties of the macromolecules and the negatively charged montmorillonite surface. [MMT/alkyl-quat-primer] and [MMT/CTAB] adducts were incorporated via a single screw extruder into polymer- and non-polymer-modified bitumina to create bitumen-nanocomposites. Composites prepared under optimised conditions exhibited an adduct network inside the bitumen at adduct concentrations larger 5 wt.% and when non-polymer modified bitumina were modified. The aspect ratio of the incorporated montmorillonite platelets depended strongly on the adduct composition and the used bitumen, and was with [MMT/PEI(10kD)10Q80R10] adducts were very high (~ 300 - 1000) but with [MMT/PEI(10kD)10Q60R14] and [MMT/CTAB] adducts considerably lower (~ 30 - 90). | eng |
dc.rights | Namensnennung-Nicht-kommerziell 3.0 Unported | - |
dc.rights.uri | http://creativecommons.org/licenses/by-nc/3.0/ | - |
dc.subject | Montmorillonite | eng |
dc.subject | Bitumen | eng |
dc.subject | Composites | eng |
dc.subject | Polyethylenimine | eng |
dc.subject.ddc | 540 - Chemie | |
dc.title | Preparation of novel bitumen nanocomposites out of polymer-modified montmorillonite nanoparticles | eng |
dc.type | Dissertation oder Habilitation [doctoralThesis] | - |
thesis.location | Osnabrück | - |
thesis.institution | Universität | - |
thesis.type | Dissertation [thesis.doctoral] | - |
thesis.date | 2017-07-06 | - |
dc.contributor.referee | Prof. Dr. Lorenz Walder | |
dc.subject.bk | 35.52 - Präparative Organische Chemie | |
vCard.ORG | FB5 | |
Enthalten in den Sammlungen: | FB05 - E-Dissertationen |
Dateien zu dieser Ressource:
Datei | Beschreibung | Größe | Format | |
---|---|---|---|---|
thesis_belke.pdf | Präsentationsformat | 96,58 MB | Adobe PDF | thesis_belke.pdf Öffnen/Anzeigen |
Diese Ressource wurde unter folgender Copyright-Bestimmung veröffentlicht: Lizenz von Creative Commons