dc.contributor.author | Apostolides, Demetris E. | en |
dc.contributor.author | Sakai, T. | en |
dc.contributor.author | Patrickios, Costas S. | en |
dc.creator | Apostolides, Demetris E. | en |
dc.creator | Sakai, T. | en |
dc.creator | Patrickios, Costas S. | en |
dc.date.accessioned | 2019-11-21T06:16:45Z | |
dc.date.available | 2019-11-21T06:16:45Z | |
dc.date.issued | 2017 | |
dc.identifier.uri | http://gnosis.library.ucy.ac.cy/handle/7/55267 | |
dc.description.abstract | We develop a new platform of dynamic covalent model polymer networks comprising two types of four-armed star poly(ethylene glycol)s (tetraPEG), one end-functionalized with benzaldehyde groups and the other with benzaacylhydrazides, resulting in hydrazone cross-links. These materials, henceforth to be called tetraPEG DYNAgels, display remarkable mechanical properties, much superior to those based on randomly cross-linked analogues. Fast aqueous gel formation takes place both at acidic and, unexpectedly, at alkaline conditions, with gel formation times covering 4 orders of magnitude in the pH range from 2.0 to 12.5 and a maximum gelation time appearing at pH 8.5. Frequency-dependent oscillatory rheology indicates a finite lifetime of the cross-links in tetraPEG DYNAgels at acidic conditions. Furthermore, these materials exhibit self-healing ability and reversibility under acidic and moderately acidic conditions | en |
dc.description.abstract | however, these properties can be canceled by chemical reduction of the cross-links. The system is highly modular, allowing the facile incorporation of other functionalities, e.g., hydrophobicity or amphiphilicity, introduced via polymers bearing terminal benzaldehyde groups. © 2017 American Chemical Society. | en |
dc.source | Macromolecules | en |
dc.source.uri | https://www.scopus.com/inward/record.uri?eid=2-s2.0-85015342360&doi=10.1021%2facs.macromol.7b00236&partnerID=40&md5=2b5fa7917a380382055df7df2f4fe155 | |
dc.subject | Polymers | en |
dc.subject | Stars | en |
dc.subject | Crosslinking | en |
dc.subject | Gelation | en |
dc.subject | Ethylene glycol | en |
dc.subject | Polyethylene glycols | en |
dc.subject | Alkalinity | en |
dc.subject | Alkaline conditions | en |
dc.subject | Frequency dependent | en |
dc.subject | Mechanically robust | en |
dc.subject | Model polymer networks | en |
dc.subject | Multi-functional materials | en |
dc.subject | Orders of magnitude | en |
dc.subject | Oscillatory rheologies | en |
dc.subject | Polyols | en |
dc.subject | Self-healing abilities | en |
dc.subject | Self-healing materials | en |
dc.title | Dynamic Covalent Star Poly(ethylene glycol) Model Hydrogels: A New Platform for Mechanically Robust, Multifunctional Materials | en |
dc.type | info:eu-repo/semantics/article | |
dc.identifier.doi | 10.1021/acs.macromol.7b00236 | |
dc.description.volume | 50 | |
dc.description.issue | 5 | |
dc.description.startingpage | 2155 | |
dc.description.endingpage | 2164 | |
dc.author.faculty | 002 Σχολή Θετικών και Εφαρμοσμένων Επιστημών / Faculty of Pure and Applied Sciences | |
dc.author.department | Τμήμα Χημείας / Department of Chemistry | |
dc.type.uhtype | Article | en |
dc.description.notes | <p>Cited By :3</p> | en |
dc.source.abbreviation | Macromolecules | en |
dc.contributor.orcid | Patrickios, Costas S. [0000-0001-8855-0370] | |
dc.gnosis.orcid | 0000-0001-8855-0370 | |